Some Important Knowledge for You about the Classification and Properties of Vacuum Pump

In recent years, humans have developed a new kind of new vacuum pump. From atmospheric pressure to high vacuum, it only need a pump can achieve the goal expected before. But generally speaking, in order to obtain high vacuum, super high vacuum and extreme height vacuum, or series of multiple vacuum pump unit form to complete the pumping task. Therefore, the correct understanding of the working principle, main properties, characteristics of pump structure and classification is very important for the user to select the economic application of the vacuum pump. The rotary vacuum pump is a device, which can be used to produce, improve and maintain the vacuum. According to its working principle, it can be basically divided into two types that the gas transmission pump and gas trapping pump.

Gas transmission pump is a kind of vacuum pump, which can make the gas suction and discharge pump to vacuum pump suction. The gas transmission pump contains two categories of volume pump and momentum transfer pumps. Gas transmission pump include: liquid ring vacuum pump (water ring vacuum pump), reciprocating vacuum pump, rotary vacuum pump, stator type rotary vacuum pumps, vacuum pump, trochoidal water ring vacuum pump, dry-type vacuum pump, roots vacuum pump, vacuum pump, molecules molecular drag pump, compound vacuum pump, a water jet vacuum pump, gas jet pump, steam jet pump, and diffusion pump. This type of pump has been widely used in the fields of metallurgical, mechanical, electronic, chemical, petroleum, pharmaceutical and other industries for vacuum metallurgy, vacuum coating, vacuum heat treatment, vacuum drying processes.
Trapping gas pump is a kind of vacuum pump, which can make a gas molecules assorted or condensate inside the pump at the surface. Thereby reducing the container, there are a number of gas molecules need to achieve the purpose of the exhaust vacuum pump. It has the following pattern: adsorption pump, getter pump, getter pump, cryogenic pumps etc. There are still leaving some residual gas in high vacuum oil diffusion pump, and 80% of those are water steam, oil and other high boiling steam.
Besides its pumping capacity, there are other disadvantages like low residual gas, long time work, and have the residual gases or the source of pollution, which can make the yield and quality of products be affected. Gas capture pump is a good choice to solve this kind of problem.
All in all, when you are choosing these kinds of products, you need to pay much attention to vacuum pump manufacturer, which can give you a good security.
This article comes from: http://www.pacificpumpgroup.com/news/42416.html

The Development of Auto Aftermarket And Some Advice

In recent years, more and more people are inclined to buy automobiles with the rapid development of automobile market. In the meantime, safety, environmental protection, reliability, speediness, comfort, economical efficiency, and other aspects of the vehicles are more demanding because of technological advances, improvement of production level and living standards, highway conditions advancement, especially the emergence and development of the highway expressway.

The service of aftermarket car chassis parts is more important as auto market gradually becomes mature. The variety, structure, and performance of automobiles also turn to be more and more diversified. For the sake of adapting to some changes, the related maintenance should get a great development accordingly and meet the requirements of the social development to the hilt.
In order to make the after service perfect and attain huge economic benefit in the automobile maintenance field, a lot of special repair stations come into being. Most of people are willing to drive their cars to these places and get car care service on account of the matched technique, brand quality guarantee, uniform standards and some other factors. There are also a complete set of technical materials of vehicles to support the maintenance. The technicians have rich experience. They are able to find the failure cause of the autos with the materials. Thus, they can find the best way of solve the problem of malfunction.
Additionally, automotive electronic technology and products are widely applied in the market. This will bring upgrade and update of the industry. More and more detecting instrument and facilities will appear as well. Meanwhile, dedicated devices such as vehicle models and car chassis components will have more applications. Now, most customers want to have finer maintenance. Every basic service project evolves into multiple levels. Apart from conventional car washing projects, surface polishing, fine waxing, interior deodorizing, air-condition maintaining, and other things are also the objects which can be implemented for car owners in the special station of car maintenance.
In short, it is advisable that the workers should have qualified knowledge in the after market. The urgent affair of the whole auto industry is to strengthen the training of related maintenance technicians. By doing this, it can help the enterprise get more competitiveness and enhance the operation level of the whole industry. Some auto parts OE supplier has exhibition in various regions every year. It is also vital to put stress on dissemination and promotion at ordinary times. It is highly suggested to have some good plans of marketing and brand promotions.
This article comes from: http://www.mjautoparts.com/news/42422.html

The Classify Of Deutz Generator Sets

Deutz company is the world famous independent manufacturer of diesel generating set, deutz has a reputation for the air-cooled diesel engine in the world, and in the early 90 s, the company has developed a new water-cooled engine (1011, 1012, 1013, 1015, etc). the products with a series of significant advantages of advanced, efficient, reliable, energy saving, environmental protection. It is with functions of inlet flow, and can well adapt to the plateau, high altitude.

Deutz generator set has reliable performance, good quality, small volume, low fuel consumption, 10 ~ 1760 kw power range. The structure design is reasonable, the performance is reliable and excellent, the working life is long, the use is economic, the operation and maintenance is convenient, and it has strong environment adaptability and high reliability, wide application and little vibration, low noise, good low-temperature start.
The engine cooling system is divided into two kinds: water-cooled engines and air-cooled engine. Air Cooled Engine is with Air as cooling medium of the Engine, it relies on fan produce wind power,and guide the direction of the wind through the wind cover to take away the heat from the burning of the Engine cylinder. The engine structure has the following features: one is outside the cylinder liner is processed into heat sink, to increase the cooling area and increase the cooling effect; the other is that there is equipped with airtight enclosures wind outside, to minimize the loss of the wind. Motorcycle use air-cooled engine, more modern car use water more. But it has its drawbacks as well as, the cylinder block and cylinder head stiffness, vibration, the noise is big, and easy to overheat.
Water-cooled engines is the engine with water or water as the main component of antifreeze as cooling medium. It on the inner wall of the cylinder and the cylinder head casting out some channels for water circulation, and outside there is special radiator. It has the advantage of cylinder block and cylinder head good rigidity, small vibration, low noise, it is not easy to overheating. So it is adopted by most modern cars. Its disadvantage is that the structure is complicated, the quality is heavier, it need often added coolant, cold start is slow, and it is not easy to move.
Deutz diesel generators have achieved rapid development in China. It is mainly used in petroleum, China petrochemical, China citic group and other domestic famous enterprises, and many of the city sewage treatment project. It can provide the medium-duty truck, light vehicle, bus, engineering machinery, and other areas of the different demand with higher content of science and technology, the specialized degree stronger power products.
This article comes from: http://www.mpmc-china.com/news/42406.html

Outstanding Induction Lighting Is Applied in Many Fields

It is undeniable that various forms of light sources are being utilized in multiple fields. Light is truly necessary in our daily life. When it comes to induction lighting, we have to say that it is a good helper in many places. Since it has no electrode, its working life is longer than any other traditional lamps. It is proved that flicker will not happen to this kind of lamp. Anyway, there are a wide range of applications of the innovative lighting.
The devices provided by induction lamp suppliers have quite a lot of unique features. With amazing dimming performance, they are also good for environmental protection and energy saving. It is true that the lighting for the expressway and tunnel is extremely important. Since it is very difficult to implement maintenance in these two kinds of places, high quality lamps of long life are always required. They will help to reduce the power consumption and cost of producing lamps in the industry. Less pollution will be emitted.

In addition, the special fluorescent powder together with great workmanship ensures that only tiny light failure will happen to induction street lights. In the mean time, the lighting quality will be well-guaranteed. There are many types of designs for the shiner of the lamps. Some are not only for lighting, but also for decorating. Usually, you are able to see such lighting devices in the street, supermarket, shopping malls, and other places where high luminance lighting is needed. They will not be harmful to our eyes. And, they can provide a sense of safety for the drivers in the street.
The light units are also applied in numerous manufacturing plants. Because a good working condition is vital in the workshops, superior lamp should be applied. The staffs who work under the warm-toned lamp will feel more comfortable. They are even able to work more efficiently. Induction high bay has its own characteristics to meet the requirement. There is no necessity to do maintenance. As long as we use this late-model way of lighting, it is possible for us to get maximum benefit.
Apparently, we should not overlook the influence of the new generation of light source. As time passed by, the lighting technology will become more and more mature. In any case, China Induction lamp is more desirable in combination to the other kinds of lighting lambs. With excellent properties, it will gradually increase in demand.
This article comes from: http://www.ynllighting.com/news/42414.html

Introduction, Design Principles and Extensive Applications of Mobile Hoists

Nowadays, mobile hoists are extensively applied in hospitals, shipyards, loading docks and some other places where they are highly required to transport different types of objects for short distance. Since the mobility hoists are mounted on wheels, thus making it easier to carry the objects to the desired positions. For instance, by the help of electric patient lifts, the ambulance men can easily move the wounded patients to the ambulance so as to save time to rescue the patients. So, how much do you know about the introduction, design principles and applications of mobile hoists?

Brief introduction of mobility hoists
Generally, portable electric patient lifts are devices which can help move the injured people who got wounded during some traffic or construction accidents. At this moment, any manual lifting and handling may consequently lead to a severe strain on the patient because inappropriate handling will result in back pain or other injuries. However, by choosing appropriate lifting hoists for disabled and using them to move the patients to hospitals, the risks of sustaining injuries will be greatly reduced. Moreover, with the help of mobility hoists, the peasants are more likely to get rescued.
Design principles
The mobile hoists consist of frames, horizontal moving devices and beds. One of the most noticeable design principles of electric patient lifts is that the patients will feel very comfortable and convenient when they sit in the mobile device. Moreover, the patient will not be influenced by the movement of portable electric patient lifts, thus the patients do not have to worry about wound dehiscence and deterioration problems. More importantly, the structures of mobile hoists are very simple, which precisely means that the devices can be made into integration with the bed. So the devices can be applied in both hospitals and homes.
Extensive applications
One of the most common applications of the mobile hoists is found in a hospital, a nursing home, or some kind of ongoing care facilities. The mobility hoists are usually applied to move the patients for short distance. For instance, if a patient got severe back injury during a construction accident and could not stand on his own or with the help of other assistants, he must be transported to the nearest hospital to get treatment by the help of portable mobile patient lifts.
Furthermore, the mobility hoists are designed in a humanized way to help the patients call for emergent bailout depending on the degree of assistance required.
In conclusion, different kinds of mobile hoists like lifting hoists for disabled and portable electric patient lifts are playing indispensable roles for emergent bailout for the patients. The mobility hoists are not only reliable but also designed in humanized ways, which makes them popular for hospital applications and home uses.
This article comes from: http://www.beiz-tech.com/news/42418.html

Four Common Types of the Vacuum Pump

What is the vacuum pump? Vacuum pump, which involves the vacuum principle, physics, chemical and machinery, is one of the most widely used pumps. And, vacuum pump manufacturer offers all sorts of pumps now.
Jet-type
This type of vacuum pump involves the use of air-liquid mixture (this may refer to air, high pressure water or steam). It's typically comprised of an ejector, water tank, liquid-vapor separator, etc. Jet-type vacuum pump is characteristic of easy operation, power conservation and so on. Furthermore, you can use it to pump gas with corrosive or toxic ingredient unlike rotary vacuum pump.
Water ring vacuum pump
It works by means of water (working solution) as well as centrifugal force. People also regard water ring vacuum pump as a compressor. By applying this type of vacuum pump, you can benefit low manufacturing cost, easy maintenance, stable running, etc. Additionally, it's able to get rid of flammable or explosive gas because of isothermality compressed gas.
On the other hand, water ring vacuum pump can't serve the interest of customers with high efficiency requirement. This is because it only offers 30~50 perfect efficiency.

Rotary vacuum pumps
Rotary vacuum pump, comprised of body, rotor, spiral slice or spring, comes in single stage or double stage vacuum pump. It works by means of centrifugal force and tension of the spring. It's often seen in the chemical, light industry, medicine industry, etc.
Rotary vacuum pump features a flexible use - that means you can take it as low vacuum pump and meanwhile combine it with high vacuum pump. However, you can't take it as a compressor.
While, there are a few limits when using rotary vane vacuum pump. When pumping gas with high oxygen, explosive or toxic content, you'd better substitute another vacuum pump for rotary vacuum pump allowing for safety.
Reciprocating vacuum pump
The influence of reciprocating movement of piston allows pump to work. Reciprocating vacuum pump, made up of body, cylinder, crank axle, connecting rod, piston or gas valve, is available in vertical as well as horizontal type.
It's characterized by high efficiency and high vacuum degree, but features complicated maintenance. Currently, it works well to pump corrosive gas with no solid particles.
As vacuum pump features higher efficiency, stable performance as well as durability, it has won the trust of customers. Its popularity is also due to numerous types, offering customers enough space to choose which type is more suitable.
This article comes from: http://www.pacificpumpgroup.com/news/42230.html

Which One Has the Good Market Outlook: Hot Dipped Galvanized Steel Pipe or Cold Galvanized Steel Pipe?

The galvanized steel tube has been used in water supply lines of buildings for about one hundred years. It has the good stiffness, impact resistance and wear resistance. The raw materials of galvanized steel pipes are easy to obtain and easy to machine. With these advantages and the moderate price, the galvanized steel pipes are generally acceptable in agriculture and as the water supply lines and fire pipelines in construction industry.

In order to increase the corrosion resistance of steel pipes, they must be galvanized. According to the different zinc-plate processes, galvanized steel pipe can be classified into two categories: hot dipped galvanized steel pipe and cold galvanized steel pipe.
Hot Dipped Galvanized Steel Pipe
Here is the process of hot dipped galvanizing: at first, remove the ferric oxide on the surface of the steel pipe; after then it's the solution cleaning process that put the steel pipe into the solution tank which is can be ammonia chloride solution tank or zinc chloride solution tank or the ammonia chloride and zinc chloride mixed solution tank; at last, put it into hot dipped tank. The essence of the hot dipped galvanizing process is that the molten metal reacts with the iron matrix and then the alloy layer is generated on the surface from the reaction to protect the steel pipe from corrosion. The hot dipped galvanizing has the advantages of high uniformity of zinc coating, high coating thickness and strong adhesion and the hot dipped galvanized steel pipes has the long service life.
Cold Galvanized Steel Pipe
The cold galvanizing is equivalent to the electro galvanizing. It has the completely different galvanizing process to the hot dipped galvanizing. In the process of hot dipped galvanizing, the steel pipe is put into the molten zinc liquid at the temperature of 450 to 480 centigrade. But the process of cold galvanizing is the electroplating method at the normal temperature. The zinc coating mass of the cold galvanized steel pipes cannot measure up to that of hot dipped galvanized steel pipes. And what is more serious is that the cold galvanized steel pipes are prone to cause water solution when they are used as water pipes and gas pipes, so that the cold galvanized steel pipes have already banned in many countries.
Most of the regular manufacturers have already abandoned the electro galvanizing to meet the best quality requirement and galvanized pipe suppliers have barely supplied the cold galvanized steel tube today. The hot dipped galvanized steel pipes has the much thicker zinc coating, the better corrosion resistance and its service life can be 30 to 40 years! The cold galvanized steel pipe is generally eliminated, but the hot dipped galvanized steel pipe has the great market prospection.
This article comes from: http://www.eaststeelpipe.com/news/42224.html

Features And Usage of Some High Efficiency Washing Machine

The emergence of washing machine has helped us get rid of miscellaneous and toilsome housework. However, it also causes a lot of noise which may impact our life. To be honest, we are not very satisfied with the noise, high energy consumption, small washing capacity, etc. So, knowing how to solve these problems is quite important.

Actually, high efficiency variable frequency motor is adopted for Panasonic XQB72-QF7130 pulsator washing machine. It can provide extraordinary laundry experience for users because it is not only a quiet washing machine but also good for saving energy. Furthermore, it has air-drying function. It won't destroy the clothes when it is working. It is really an excellent invention for environmental protection and our health. Its washing program design is so diversified that users can be content with it. The crate is made of zincizing steel plate. It is simple and convenient for usage.
Moreover, there are a variety of washing functions with the brand product. You can reach to self-compiled programs according to practical necessity and wash all of your clothes more carefully and more cleanly. You can make an appointment to do washing anytime. This is a humanization design that suits for office workers and people living in the places where time-of-use electricity price is carried out. Safe child lock function will meet the curiosity of kids. Adults will not need to worry about anything.
It is worth mentioning that the internal cylinder of high efficiency top loading washing machine is made of highlighted stainless steel which features corrosion resistance, oxidation resistance and durable service. The capacity for washing is very huge. The bucket self-purification function can avoid the secondary pollution. This machine has a box where crumb softener is packed there. It makes the abluent be dissolved fully and improve the detergency of the clothing.
The design philosophy of Panasonic XQB72-QF7130 machine is truly humanized. It is user-centered. The designers are dedicated to bring the best washing experience for us. The perfect combination of advanced washing technology and utility design scheme helps us obtain the perfect pulsator washing machine. It is believed that it will offer unexpected pleasure when you are using it.
Of course, there are also many other types of energy efficient washing machines. Overall, if you are a person who likes to enjoy quiet life, you will find that it provides timely help instead of cresting the house when all electric appliances are designed with low noise and energy conservation. The world can be in peace and quiet. Anyway, it is rather imperative that most of consumers should take a washing machine with advantages of quiet and high efficiency.
This article comes from: http://www.washing-machine.cc/news/42234.html

Fuctions and Classifications of Optical Isolator

Optical isolator is a kind of free space isolator. It is common optical equipment and device used in optical fiber communication system and precision optical measurement system. It is a kind of passive optical component that allows only unidirectional light goes through. Its working principle is based on the non-reciprocity of Faraday rotation. The light reflected by the optical fiber echo can achieve good isolation effect by optical isolator. So optical isolator is to allow light to one direction and block it to the opposite direction by the passive components. Its function is to limit the direction of the lights to make the lights only go to a single direction, and in this way it can improve the efficiency of light transmission. The characteristics of optical isolator are high isolation efficiency, low insertion loss, high reliability and high stability.

Let us have a look at its working principle and function. In detail its role is to prevent the back lights made in the light transmission process for a variety of reasons do harm to the light source and optical system. For example, if between the semiconductor laser light source and optical transmission system there is an optical isolator installed; this can largely reduce the bad effect that the reflected light does to the spectrum of output power stability. In the optical communication system, we install an optical isolator in every other distance; we can reduce the power loss. Therefore the optical isolator plays an important role in optical fiber communication system, optical information processing system, optical fiber sensing and precision optical measurement.
There are a wide variety of optical isolators in the world. According to its internal structure it can be divided into block type optical isolator, fiber optical isolator and the waveguide optical isolator. There are also other kinds, such as in-line isolator and so on.
1. Block type optical isolator
This kind of isolator is a discrete component structure. It means getting together the gap of optical isolators in the light path structure through the lens of the gathered polarizer and Faraday rotator. This kind of device is relatively mature in technology, now it is commonly used in the market. The opto isolator manufacturer produces many products for the use in optical systems. However, it also has some disadvantages. It needs many optical devices, so it is relatively huge.
2. Fiber optical isolator
This type refers to do some work on the optical fiber end surface, such as polishing coating in the light path structure of isolator. It has the following characteristics. It has small size, light weight and good resistance performance to mechanical vibration. However, making the devices we should use the special optical fiber, and it requires high machining accuracy, complex producing technology and much manufacturing cost.
3. Waveguide free space isolator
Waveguide optical isolator belongs to the integrated optics. It is made on the basis of lithium niobate with Ti, and it is processed by deposition, photoetching, spreading and it is made into magneto-optic waveguide. After that it is processed together with other components. In this way we have this kind of optical isolator. It has small volume and light weight. Its thermal stability and mechanical stability are good. But due to the immature technology, its real performance still has some disparity with the required standard.
This article comes from: http://www.glsun.com/news/41790.html

The Current Situation and Future Direction of China Washing Machine Exports

China washing machine exports enters rapid growth period since 2003, but since the start of 2009, under the influence of global financial crisis, China washing machine exports have been great changes. After the financial crisis China washing machine exports have been reduced, but compare with other countries, have gained, rather than lost in the international market share.

In 2012, the proportion of China washing machine exports in total sales was about 35% .The exports of China washing machine products to Japan , the united states and some other developed area has maintained its equilibrium, yet the sales of cheap washing machines grow faster in the emerging markets. In the background of a worsening environment for exports, the washing machine export growth will slowdown in the future, but as soon as home appliances policies being withdrawed, China washing machine companies would find it difficult to sell products at home, and the importance to sell abroad would showed up.
On the other hand, in Asia, Africa, and Latin America, especially Countries like Indonesia, Egypt who has large population start to show its huge consumption potential. In 2012,the Exports of washing machine to Indonesia, Egypt both exceed that to us, exports to Indonesia was twice to us:china exported 373700 washing machines to Indonesia,22.38% increased year-on-year,189300 washing machines to Egypt, 14.48% increased .The new Market above-mentioned rise rapidly, which makes exports more important. Insiders estimated that the exports of cheap washing machines and other appliances will keep growing, and Asia, Europe and Latin America will still be major markets to China.
So far with the whole situation to China washing machine exports at the present state, washing machine manufacturers from Cixi,Ningbo city who make middle-low-priced products has no price advantage after appreciation of the RMB, at the same time market who need middle-low-priced products becomes Saturated. From the washing machine development in China, it is doing increasingly well in the high end of the market, in this case China washing machine exports should try to improve the product structure, export on high-end way.
By comparison, foreign companies seem more optimistic in exports. cause foreign companies operates global, some of its manufacturing bases which operating cost too much have been closed , reduced or moved to China in a depressed economy, no doubt it has larger exports in China. For many washing machine manufacturers in China who simply produce on contract for global brands, profit margins are already razor-thin, and raising prices could hurt business, they have no price advantage in middle-low-priced products.
This article comes from: http://www.washing-machine.cc/news/41792.html

Extensive Application of Solar Mosquito Killer Lamp

Solar mosquito killer lamp adopts the solar energy production technology and solar battery new technology. It transforms the solar energy into the power for storing and using. It receives the solar light during the day to store; during the night, it starts automatically the ultraviolet light source through the intelligent electronic control; the solar LED lamp is opened; and then the photovoltaic effect is produced. This can kill the pests and eradicate their propagation.

Solar mosquito killing lamp can be widely used in agriculture, forestry, vegetables, tobacco, storage, wine brewing, gardens, orchards, urban greening, aquaculture and so on. The solar mosquito killer lamp can kill various pests, such as underground pests, wheat pests, rice pests, cotton pests, grains pests, vegetables pests, storage pests, fruit trees, forest pests and so on.
Solar mosquito killer lamp uses the physical instruments to replace chemical pesticide plant protection. It reduces the use amount of chemical pesticides, lowers the cost of agricultural production and produces the pollution-free agricultural products. It is a significant innovative research. The solar mosquito killer lamp saves the work force and money and increases production of agricultural products. And there are no pesticide residues. The agricultural products are beneficial to the health of the people.
The solar mosquito killer lamp not only gets a good effect in the agricultural industry, but also receives a good effect in the public places.
The city has entered the modern style. After finishing the busy work, everyone wants to walk in the green residential garden, hotel space, public squares or other nearby public places. Sometimes you can sit in the chair of public places. But it is annoying that there are many mosquitoes. Mosquitoes have characteristic of the phototaxis. The solar mosquito killer lamp adopts new mosquito killer concept; it uses advanced biological mosquito induction technology and physical mosquito killing device to lure and kill the pests. The kind of LED street light mainly kill the mosquitoes, moths, flies and other 100 kinds of harmful insects. The solar mosquito killer lamp realizes the real high efficient, practical and novel characteristics. It has the environment automatic recognition switch, outdoor lighting and decorative function. It realizes the perfect combination of use and decoration. The solar mosquito killer lamp can be used in the indoor and outdoor place, municipal construction and so on.
Solar mosquito killer lamp can greatly reduce use of the pesticides and replace the conventional electricity; and it has the advantage of saving energy. Therefore, it is the most ideal physical mosquito killer method in the modern society.
This article comes from: http://www.yourlite.com/news/41788.html

Structure, Matters and Attention of Deutz Genset

Deutz Corporation is the world famous independent manufacturer of diesel engine, founded by inventor of four circle engine in 1864. Currently, the corporation has four engine works in Germany, 17 certificate of authority and cooperation works in the world. Power of diesel engine produced is from 5 horsepower to 5,000 horsepower, while gas engine power is from 250 horsepower to 5,500 horsepower. Deutz Corporation is famous for air-cooled diesel engine. We will focus on characters, matters and attention of Deutz Generator Sets in this article.

What features does deutz generator set have on earth that makes it known all over the world? Well, don't worry, the answer is here. Compared to other generator sets, Deutz Genset has a close structure, reasonable design, reliable capacity and long life expectancy. On top of it, it is economical. On products structure, C, E and D three products platforms are owned by this company, with power from 85 horsepower to 340 horsepower. What's more, more than three hundred of various variants and adaptable products are produced to provide high-tech and professional dynamic products for fields of heavy duty truck, coach and engineering plant and so on. Therefore, Deutz Generator sets have endless advantages such as: advanced, high effective, energy-saved and environmental protection. What deserves mentioning is the air reflow feature, which can easily adapt to table land and high latitude localities.
However, all good quality products have disadvantages, if you don't care, maybe they will malfunction and bore you. So I am here to explain some matters and attention for deutz diesel generator set as follows:
(a)After every 50 hours' operation, water in the oil-water separator should be let off. Besides, remember to check and start battery electrolyte;
(b)After 200 to 300 hours' operation, do not forget to check valve lash and oil atomizer;
(c)Every 400 hours' operation, driving belt needs to be checked and regulated, and exchanged if necessary. Otherwise, check and clean radiator core fin and exhaust silt sullage in the fuel tank;
(d)Lubrication oil and lubricating oil purifier should be changed after every 600 hours' operation. According to quality of lubricating oil, fuel sulphur content and lubricating oil consumption, frequency of the unit to change the oil cycle is different;
(e)Exchange oil-water separator and fuel filter during every 800 hours' operation;
(f)After every 1200 hours' operation, get valve lash regulated and have a completely cleanness of radiator water tank chip and water pipelines;
(g)Check oil atomizer and completely check, clean turbine blower and have a wholly inspection on the Generator Sets after 2400 hours' operation. Keep in mind what mentioned above, which is good for preservation of Deutz Generator Sets and keep a long life expectancy of deutz diesel generators.
This article comes from: http://www.mpmc-china.com/news/41784.html

Selection Tips for Automotive Radiators

The operating temperature of an engine of a car is critical because engine could work well within certain range of temperature. The operating temperature could ensure longevity and high performance of an engine, but it can also ruin the engine when it is too high. Engine generates a large amount of heat which could damage itself, and therefore, an all aluminum radiator for the engine is very necessary. The automotive radiators dissipate heat generated by the engines through the circulation of coolant. They have certain period of service life, and therefore, when you select new auto radiators, you could consider the following tips.
Material which is made for manufacturing the racing radiators should be taken into consideration at first because heat transfer coefficients of different materials are different. In the market, the automotive radiators are usually made from aluminum and copper because these materials have good heat dissipation ability. But automotive specialists suggest that aluminum racing radiators are more favored for cars because aluminum is stronger and lighter. On the contrary, copper is softer, and it is heavier than aluminum by 60% when they are made into the same automotive radiators. Aluminum auto radiators could provide excellent heat dissipation effect and fuel saving advantage.

Structure of the auto radiators requires more attention from you because it also determines the heat dissipation effect of automotive radiators. Structure of a radiator could be divided into down-flow radiator and cross-flow radiator according to the travelling ways of coolant in the radiator. The type of the structure could be determined by packaging limitations of engine bay. An original type of engine bay requires a down-flow radiator while a modified engine bay could use a cross-flow radiator. When it comes to comparison, the cross-flow radiator is more efficient than the down-flow radiator.
The auto radiators could be selected according to the modes of cars. Business cars could use ordinary automotive radiators which could serve the vehicles fully. Racing cars should be equipped with racing radiators because engines in racing cars generate more heat and have higher requirement for the heat dissipation performance of auto radiators.
In order to select good auto radiators, users should know more knowledge about radiators so as to select appropriate and high performance radiators. At the same time, automotive radiators should be purchased from reliable automotive radiator suppliers so that the radiators have excellent after service, proper design, stable working performance and reliable quality.
This article comes from: http://www.spdmaster.com/news/41780.html

Classification, Effect, Working Principle and Characters of Optical Isolator

Optical Isolator is an optical passive device that only allows passing through of one-way light, whose effect is to limit direction of light and keep light transports in a single direction. Thus, via fiber optic cables echo reflected light can be isolated by Optical Isolator to improve optical transmission efficiency. This article, I will focus on classification, working principle and features of Optical Isolator.

For the purpose of satisfying demand of different fields, Optical Isolator Manufacturer produced various kinds of Optical Isolator, mainly include: In-Line Isolator, Free Space Isolator and Fiber Optical Isolator and so on. It is widely used in optical fiber amplifier, fiber laser, fiber CATV net and satellite communication and so many fields. Generally speaking, wavelength of Optical Isolator is from 800nm to 1300nm, of course, there are some exceptions.
Now let's have a look at working principle of free space isolator: magneto-optical crystal Faraday Effect. As shown in the following, forward incoming signal light turns to linearly polarized light through polarizer. Faraday rotation magnetic media and external magnetic field make signal light have a 45 degree rotation at right. To backlight, when linearly polarized light pass through place media, its direction also have a 45 degree turning at right, thus, make polarization direction of backlight cross-cut with polarizer to completely block the transportation of reflected light.
Besides, follow me to effect of Optical Isolator. That is to prevent all bad influences on light source and light system caused by after transmission light. For example, install an Optical Isolator between diode laser source and light transmission system can decrease bad effect that reflected light have on stability of spectra of the light output power. At the same time, in the system of high speed direct modulation and direct detection of optical fiber communication, backward transmission light will produce extra noise which can make the system performance degradation. At this time, Optical Isolator is needed to remove the noise. Apart from these, installation of in-line isolator at both sides of fiber amplifier can improve working stability of fiber amplifier.
The most important thing is the characters of Optical Isolator. Due to its high isolation, low insertion loss, high reliability, high stability, extremely low polarization loss and polarization mode dispersion, it is widely accepted by customers all over the world. That's why so many Optical Isolator Manufacturers are flooding into the international market to challenge the fierce competition and manage to make their product a good selling point.
This article comes from: http://www.glsun.com/news/41146.html

Repair and Maintenance of Engine Cylinder Liner and Piston Ring

Engine cylinder liner and piston ring is a critical friction pair of a car which works in high temperature and pressure. The friction pair is easily abraded and out of shape because of working in a complex environment for a long time, which shortens the life of the engine and results in a waste of money. That's the reason why it means so much for the piston ring manufacturer and the cylinder liner manufacturer to find a way to mitigate the situation.

There are several reasons for the abrasion such as the high temperature and the lack of lubrication. It's normal for an engine to be abraded for structural reasons. While, an inappropriate use and maintenance will probably result in an uneven wear.
A combustible mixture of air and fuel burning in the engine can produce water and acidic oxide, which will finally be turned into mineral acids. The mineral acids coupled with other organic acids produced while burning will corrode the surface of the cylinder liner and the engine main bearing. The corrosion will be scraped by the piston ring during the friction, which causes the deformation of the cylinder liner.
Mechanical impurities such as the dust in the air or the gases in the lubricating oil will slip in and out of the cylinder with the master cylinder piston, which increases the abrasion.
Things will get worse if the effect of the lubricating oil filter is poor. Metal fragment will pile up in the bottom of the engine, which will definitely cause great damage to the engine cylinder liner and the piston ring.
In view of the above reasons, following measures should be taken to maintain the engine cylinder liner and the piston ring:
1. Remember, a car should be started with a low gear until the temperature of the oil is normal. In this way you can reduce the wear caused by the shortage of lubricating oil in gear oil pump.
2. Choose the best value of the lubricating oil according to the seasons and the performance of the engine. Keep this in mind that we should never purchase inferior crude oil.
3. Keep the temperature of the engine between eighty to ninety degrees. Water vapor condenses into water droplets in the engine to produce acids because of the low temperature just as mentioned earlier. Meanwhile, accidents occur easily when the temperature of the engine is over ninety degrees.
This article comes from: http://www.mjautoparts.com/news/41176.html

Two Differences Between the Single Stage Pump and the Double Suction Pump

Centrifugal pump is divided into single stage pump (SSP) and double suction pump (DSP) according to suction method. Seen from appearance, the SSP has one water inlet on its impeller whereas the DSP has two on the two sides of the impellers. However, differences between the two pump types are far more than the number of water inlet.

Structure
The fundamental parts of a single stage pump, also called an end-suction pump, are an impeller which rotates with high speed and a fixed pump case in the shape of snail. The impeller with some backward bent vanes is tightened on the pump spindle and revolves with the spindle at a high velocity under the drive of the dynamo. The suction inlet in the center of the pump case is connected with the suction line which has a one-way foot valve in the bottom. And the outlet aside the pump case is combined with the discharge line loaded with a regulating valve.
The double suction split case pump has two back-to-back impellers which have symmetrical structures and the water flowing out of the impellers gathers into one volute. What's more, the inlet and the outlet of the DSP are in one direction and are perpendicular to the pump spindle. Some other chief units of the DSP are: pump body, pump cover, pump spindle, double suction sealing ring, spindle sleeve, shaft bearing and so on, among which the pump body and the pump cover constitute the work room of the impeller. On the flanges for water inlet and outlet there are pipe screw holes loaded with a vacuum gauge and a pressure gauge. And the pump spindle is supported by two single-row-radial-ball shaft bearings that are installed in the bearing bodies at the two ends of the pump body.
Advantage
For the single stage pump, there are two prominent advantages. Firstly, it is energy efficient, because during design the relationship between the pressure distribution and the velocity distribution is analyzed and counted out on the basis of computational fluid dynamics and the runner design of the pump is optimized, thus a high-efficiency hydraulic line is ensured and the productivity is prompted. Secondly, it is heat resisting, since the pump body is centrally supported. Therefore, the problems of press concentration and change of coupler center resulted from inconsistent thermal expansion of the pump package in high temperatures are solved. In addition, there are cooling chambers in the pump stand, the pump cover, the suspension body and the machine-sealing gland, and so they can be cooled down by the cooling water or the cooling air in different temperatures.
As to the double suction pump, it owns mainly four merits. To start with, its compact structure and good stability help for assembling. Then, it operates steadily, for the optimized double suction impellers reduce the axial force to a minimum, the blade profile has an excellent hydraulic performance, and through precision casting the inner surface of the pump case and the surfaces of the impellers are especially smooth, bringing about outstanding cavitation resistance and high efficiency. Third, the shaft seal of the double suction pump is chosen from the BURGMANN mechanical seals and the BURGMANN packing seals, and thus it can work for 8000 hours without leak. At last, its shaft bearing is of a SKF or a NSK bearing, making the operation more stable, the working noise lower, and the service life longer.
This article comes from: http://www.pacificpumpgroup.com/news/41160.html

The Necessary Functions of Automotive Radiators for You to Learn

When people crank the motor, the large amount of heat will have enough power to destroy it. As the result of this, it is very needed to install automotive radiators for the car. At this time, many people may have a doubt what the exact functions are. In order to learn it well, we need have a clear idea of the basic work principle and characteristics of the modern car. This article will introduce about these aspects in details. In order to avoid the over heat of engine, it is very important to cool the parts around combustion chamber, such as cylinder, cylinder head, valve and so on. Otherwise, if you want to make sure te cooling effect, your auto radiators system need to made of radiators, thermostat, water pump, cylinder block, cylinder head, and waterway channel fan. Different parts will have different function, which you need to have a good recognize. Radiator has the responsibility to cool the circulating water, and most of its materials for water pipe and heat sink are made of aluminum. Aluminum racing radiators and racing radiators are very common to see. The aluminum water pipe can be made into flat shape; heat sinks are carried with a shape of corrugated, which will focus on cooling performance and should be installed perpendicular to the direction of air. It need try to decrease the air resistance smaller and smaller, and make the cooling efficiency higher and higher.

It is wrong to think that choosing the radiator only according to the ability of cooling, and thing the better cooling ability, the better for the engine. You should know that over cooling can do harms to the engine. If the temperate of air cylinder is too low, it will make the fuel can not be fully combustion, with the pulling of gas emissions. At the same time, the consumption of fuel will increase. The viscosity of lubricating oil will increase under the condition of low temperature, which will make every parts of friction during the movement cost more power consumption and then it will reduce the output power. At the same time, with the drops of lubricating oil coming into, it will appear some problems in the movement without lubrication and increase the wear. Too low temperature will decrease the efficiency of engine. In addiction, water vapor post exhaust combustion and sulphide condenses will change into a call and sulfuric acid droplets at low temperature, which also can corrode many parts and cylinder in the long-term low temperature is also very easy to wear.
The modern motorcycle radiators are moving towards the direction of light, high efficiency and economic, which have been appreciated by the professors and common users.
This article comes from: http://www.spdmaster.com/news/40816.html

Application and Development Trend of Solar Street Lamp

Solar street lamp adopts crystal silicon solar battery to supply the power and uses the ultra bright LED lamp as the light source. The LED Street light can replace the traditional public electric lighting lamp. It has advantages of good stability, long service life, high luminous efficiency, simple installation, high safety performance, energy saving and environmental protection. Application of solar street lamp is very wide.
Firstly, the solar street lamp is used in the relatively developed city of the coastal area. Chinese solar street lamp is firstly used in the coastal developed region. The solar street lamp uses independent or grid connected system. The LED street light can be automatically switched to supply the power through using the city power in the long term rainy insufficient illumination condition.

Secondly, the solar street lamp is used in the western region. In recent years, in the western part of China or partial western area, because the power supply distance is too large and the loss is large, now more and more LED street lights are used to replace the conventional lighting way. The LED street light is a green pollution-free and environmental protection lighting way.
Thirdly, it is also used in the project lighting. Road lighting uses solar energy street lamp. It is actually a nonstandard road lighting design. Street LED lights manufacturer adopts the industrial level chip with low power design. It can work under the condition of high temperature and cold temperature.
In recent years, garden lights, street lamps and landscape lamps are also widely used. However, many experts also point out some problems which are worthy of paying attention to.
Firstly, the LED street light lacks the relative technology. At present, the LED street light still has some problems in the power, light efficiency and service life.
Secondly, the problem of environmental pollution: the battery of the solar street lamp mainly uses the lead-acid battery. There are large quantities of lead in the waste battery acid liquid. If the battery is optionally thrown out, it will seriously damage soil and water.
The design of solar street lamp needs to be scientific and reasonable. We should overall consider the street lamp construction, especially the development of street lamp battery. And then we need to combine with practical experience and optimize the design; in order to ensure normal work of the solar LED lamp.
LED street light is the most ideal road lighting tool. With the improvement of people's living standard and social scientific research development, it will be widely applied to various regions.
This article comes from: http://www.yourlite.com/news/40824.html

Excellent Performance and Wide Application of Flood Light

Flood light is a type of point light source that shines evenly from all directions. It can randomly adjust shining range and performs an octahedral icon in the scene. As a most widely applied light source in effect picture manufacture, flood light is applied to light up the whole scene with flood lighting fixtures. It often produces good effect to apply several flood lights at the same time. When feeding bulb for taking picture into large scale reflection umbrella for the application of high brightness diffused light source, it can be regarded as a good light source of good illumination efficiency.
Outdoor flood lighting is primarily suitable for application in AD board, highway, railway, tunnel, bridge culvert, plaza and building. Its light up does not limit to certain range. In the scene, many flood light can play coordinative function to produce good effect. What's requires attention is that flood light should not establish overmuch. Otherwise, the effect icon would perform ordinary and rigid. As the replacement product of electrical light source, security flood lights have been accepted by more and more people and have been applied in a lot of fields. By following, let's come to its advantages.
Firstly, long service life. Generally, filament lamp, fluorescent lamp, energy saving lamp and other gas discharging lamp all have filamentary cathode or electrode. However, filamentary cathode and electrode are right necessary components that limit lamp service life. Compared with others illumination lights, scoop light is more than ten times of them in service life. Ultra long service life greatly reduces scoop light maintenance trouble and replacing time, saves it material cost and labor expense and ensures it long time normal application.

Secondly, energy saving and environment protective. Compared with filament lamp, it saves about 75 percent of energy. Flood light of 85W has roughly equivalent luminous flux with filament lamp of 500W. So, small power flood light can produce same good illumination efficiency effect. Besides, it adopts solid mercury agent so that it doesn't cause pollution on environment. More than 99 percent of lighting material is recyclable. We can say, it is the real green environment protective light source.
Thirdly, excellent performance. Because of its high working frequency, it totally doesn't have flicker effect or cause eyes fatigue and well keeps eyes healthy. With good color rendering property, its color rendering index is more than 80. Soft light always presents objects lighted natural luster. Color temperature can be selected according to customers' requirement. Capable of producing colorful bulbs, it is applied in gardens decoration illumination. With high proportion of visible light reaching over 80 percent in emitting lights, it has good visual effect.
Fourthly, convenient application. With electron rectifier, it can instantly start and restart. Multiple times switching doesn't cause light fading phenomenon like common electric discharge lamp with electrode. As we know, flood light has excellent electrode performance, high power factor, low current harmonics, constant power supply and constant output luminous flux. As the consequence, it saves much repair fee for excellent property and sound quality. What's more, it has installation adaptability. With outdoor flood lighting fixtures, it can be randomly installed in any position.
This article comes from: http://www.ynllighting.com/news/40838.html

The Primary Difference between Single Suction Pump and Double Suction Pump

Single suction pump, also known as end-auction pump or single stage pump, working principle of which is: when the pump starts, the pump shaft drives the impeller for high speed rotary motion, forcing the pre-filling fluid between blades to rotate. With the effect of inertial centrifugal force, the fluid moves along radial direction from the impeller center to the peripheral region. When the fluid obtains the energy in the movement through the impeller, the static pressure is increased and the flow rate is increased as well. After the fluid leaves the impeller and flows into the pump shell, it is slow down in the expanding tube within the shell, causing part of the kinetic energy converted to static pressure, and finally it is discharged from the pipeline along the tangential direction. When fluid from the impeller is pushed towards to the peripheral direction at the same time, low pressure area is formed in the center of impeller. With the impact of total static pressure difference between fluid level of storage tank and the impeller center, the fluid is sucked into the impeller center. Relying on the continuous operation of the impeller, it is possible to make continuous fluid suction and discharge.

Double suction pump is an important type of centrifugal oil pump. This type of pump impeller actually consists of two back-to-back impellers, from which the water flow into a volute. One double suction pump works just like two same diameter end-suction pumps work at the same time, so its flow quantity can be doubled by using the same outer diameter impeller. The horizontal split structure of pump shell makes easy inspection and maintenance possible. Meanwhile, the entry end and exit end of double suction pump are in the same direction, being perpendicular to the pump shaft, which is helpful for the layout and installation of pumps and water pipes; double suction pump is characterized by symmetrical impeller structure and non axial force, so it can run more smoothly and can satisfy the operating requirement of mass flow and high lift. It is widely used for the fluid delivery in drainage and irrigation of farmland, waterworks, pump stations, power stations, chemical industry, mining, fire fighting and shipping, etc.
Double suction split case pump is a type of double suction pump. It is suitable for those ordinary and recycled water supply needed mass flow and high lift flow. Transmission medium is required to be clear water or other liquid with similar physical and chemical properties to clear water.
The primary difference between single suction pump and double suction pump is: impeller of single suction pump has only one water inflow end, while double suction pump has two ends; fluid flows into the single suction pump in only one end, but flows into the double suction pump in two ends, benefit of which is to decrease the axial force and increase the flow quantity; In addition, double suction pump generally has bigger caliber so that it can be applied to industry more widely.
This article comes from: http://www.pacificpumpgroup.com/news/40840.html

A Brief Description of the Oil Transfer Pump and Its Overhaul

Definition: The oil transfer pump is able to guarantee diesel oil at low pressure inside the loop and supply sufficient quantities and to a certain pressure fuel injection pump. The quantity of oil transferred should be 3-4 times of the maximum loaded quantity of injection.

Category: gear oil pump, diaphragm pump, piston pump, pipeline pump and so on.
How it works:
1, the process of preparing: With the rotation of the fuel injection pump’s camshaft, the eccentric wheel pushes the roller, plunger and piston outward. The oil pressure raises in the pump chamber I due to a decrease in volume. At the same time, with the closing of the inlet valve 3, and the opening of the delivery valve 15 under pressure, the diesel then pumps flow from the chamber I, through the delivery valve and into the pump chamber 2.
2, Suction and pressure stroke: When the convex portion of the eccentric wheel turns away from roller, with the action of the spring, the plunger pushes inside. Then the oil pressure increases in the pump chamber 2, and the oil valve is closed, meanwhile the diesel flow through the pile to the oil filter diesel. In this case, the pump volume of the chamber 1 becomes larger, and the pressure drops. As the inlet valve 3 is sucked on, the diesel flows through the inlet and then the inlet valve into the pump chamber 1.
3, the automatic adjustment of the amount of oil: the amount of oil transported depends on the piston stroke, as well as the oil pressure depends on the tension of the spring. When the piston stroke is equal to the eccentric eccentricity, the amount of oil is max. When the amount of oil required reduces, the hydraulic pressure of chamber 2 will increases accordingly and there will be an idle stroke between the push rod and the piston. That is, the effective stroke of the piston is reduced, as well as the decrease of the output of oil. When the fuel consumption increases, the effective stroke is increased. Thus, the aim of the automatic adjustment of the amount of oil and the oil pressure is achieved.
Failure reasons of the pumps:
In general, the mechanical pump is very reliable. Esven if a fault appears, it is often a lack of oil transportation caused by the rupture of diaphragms. Sometimes, excessive wear of pump rocker arm or spring, can also cause the oil transportation shortage, which is very easy to identify. The old-fashioned pumps are repairable, whereas the new types of pump cannot be removed; therefore once there is a fault, the pump is needed to be replaced.
Repair methods:
1, Check the push rod in the pump first, which drives the work of the diaphragm. Block the pump inlet with your fingers gently, and try to start the engine. At this time, if there is a feeling of suction, then it proves that the push rod is intact.
2, On the other hand, if you feel no suction of the finger tips, it is indicated that the push rod is damaged, and fuel pump should be replaced. As the electric fuel pump working, if there is a powerful pumping sound, it indicates that the pump is in good condition, if not, it is an indicating of malfunction.
This article comes from: http://www.pacificpumpgroup.com/news/40590.html

Top Tips on How to Maintain Gear Pump

Gear pump is one of popular pumps in the current, which is widely applied to a lot of industrial fields. Comparatively speaking, it enjoys much easier structure that consists of two same size toothed gears, front and behind shields and pump body. The simple structure paves the way for understandable working principle. An enclosed space is made up the mentioned four parts. When two toothed gears begin rotating, such an enclosed space is becoming bigger increasing. At the same time, the liquid substances will come into that enclosed chamber. When the chamber reaches the biggest volume, it will start to shrink until the liquid is squeezed into pipeline totally.

There are several different types of high quality pumps in the nowadays market like multiple gear pumps, PTO gear pumps and the like. What are they used for? Get to know the basic function of gear pump in the very first place. All of the gear pumps are mainly used to transport liquid substance or pressurize them based on the volume change of the enclosed working chamber. Concretely speaking, it can be used in many occasions. First of all, it is used as the hydraulic dynamical system for many engineering machineries, such as excavator, mechanical loader, pavement roller, bulldozer or crane and so on. At the same time, it can be used to deliver and pressurize fuel during the fuel transfer system. What is more, it also can be a lubricating gear oil pump that is widely applied to many industrial areas.
In order to make sure the high working efficiency and long service life, besides reliable and credible gear pumps manufacturers and gear pumps supplier, maintaining the machine at the fixed intervals is also an effective method. Here are some useful maintenance tips. Before starting up, the tightness of pipeline flange and joint should be checked. The coupling should be made sure no friction noise. Meanwhile, the liquid should be added in the pump if it is the first starting-up. Besides, the valve and electrical machine also should be examined before and after the operation. In order to avoid the oil leakage problem, a control valve had better be installed and it can replace the pipeline between pump and direction valve, which also reduces the cost. Low leakage guarantees reliable operation, too. Parts attrition of gear pump should be paid special attention to, or it will affect the normal working condition. Therefore, the attrition condition should be checked at the fixed period, and replace the wearing ones in time.
This article comes from: http://www.grhfluid.com/news/40640.html

The Market Prospects of Cummins Generator

Since the nineteen seventies, cummins generator sets began to enter the Chinese market, and then achieved a certain status. Also, with the development of global industrial production, cummins generator is going to be widely applied around the world. Today, in the second quarter, cummins generator achieves new records. All of engine and component companies refresh the record of their sales and earnings. It can be seen that cummins generator market presents a relative grow momentum.

Cummins is the largest manufacturer specialized in alternators in the world, and has rich production lines, including diesel generator sets, engine main parts, power generation system, as well. Diesel generator sets are widely applied in the lines of ship, petrochemical, road, bridge, public engineering, industrial and mineral enterprises, and so on. Also, cummins has long term adherence with Chinese large enterprises of strategic alliances, and realizes common development. For 30 years, genset cummins China have made great progress.
Cummins diesel genset has a good, complete configuration, including control system, heat release system, filter system, and some attachments. In a number of high reliability control system, it tends to have high computing power and cost-effective. Also, some attachments such as muffler, bellow, pipe bender, and other parts result in a better performance of cummins generator.
Beside, cummins generator has a great deal of innovative features. First of all, it is characterized by the low consumption of oil, low pollution emission and a bright future for development. Fuel consumption ratio of cummins generator is lower than other generators, and the rate of saving power is about 5%. Secondly, it uese PT pump technology to ensure stable and reliable performance. Thirdly, it is featured with compact structure, stable, easy operate and convenient on repairing. Fourthly, cummins generator is designed optimized to get longer service life and lower production cost. Finally, it meets EuroⅢ emissions standard in industry, which can reduce damage to the environment.
What's more, cummins genset manufacturer, which is a professional production and sales of diesel generator sets of large-scale specialized enterprise products, offers these machines in variegated specifications at industry-leading prices in order to cater to the diverse requirements of customers. Its proposition to customers is an offer of lower price and best quality prducts.
All in all, according to its features, there is no doubt that cummins generator is an important tool not only in industry but also in many other areas. Therefore, cummins generator has vast market prospects.
This article comes from: http://www.mpmc-china.com/news/40244.html

The Selection of Fire Pump

The water that is used for firefighting always needs to be pressurized by fire pump so as to reach the requirement of pressure. And the defects of fire pump set probably cause a great loss that could have been avoided. The function of fire pump should superior than the water in life and production, so it is important to choose a qualified fire pump for firefighting.

The United States stipulates that the maximum flow of fire fighting pump should be 150% of designing flow; the minimum head is 65% of the head of selected work-yard. When the fire pump is closed, the maximum head is 140% of the head of selected work-yard, the pump flow is 1-2L/S, the head is 1.1-1.2 times on the head of fire pump. And a flow meter should be installed on the outlet pipe of fire pump, its range should reach 175% of selected pump flow. A pressure gauge which is up to 89mm in diameter should also be fixed on the outlet pipe. All these parameters can be used as references for designers and purchasers.
The function of pump regulator in supply system is to maintain the normal pressure of fire pump. The pressure of pump regulator can be determined by the pressure of the system, its pressure should normally 0.1Mpa-0.2Mpa higher than the main pump, or 1.1-1.2 times of the main pump. As to the flow of pump regulator, the NFPA20 (1996 Edition) set that the flow of Pressure Maintenan Pumps/Jockey Pumps/Make Up Pumps is not less than the amount of leakage of the system under normal conditions. And the pressure of pump regulator should be sufficient to maintain the system pressure.
According to a survey that the flow of pump regulator is always between 0.5L/S to 2.0L/S in many countries, the water hammer may exist when the pump is closed without pressure tank in the system. The flow of pump regulator is recommended within 1.0L/S-2.0L/S, the pressure of it should be 0.1Mpa-0.2Mpa higher than the main pump, or 1.1-1.2 times of the main pump. And a pressure tank should be installed in system, if not, the controller of pump regulator should be paid more attention to avoid the pump regulator starting frequently because of the effect of water hammer. Only in this way can a fire pump system work normally. And these standards can also be applied to electric fire pump.
This article comes from: http://www.pacificpumpgroup.com/news/40252.html

Why You Should Choose Electric Power Wheelchair with Lithium Cell

With the development of society, aging problem becomes increasingly important. To improve people's living standard, wheelchairs come into families with the old. Several years ago, wheelchairs are almost moved by hands, but now, things have totally changed. Electric power wheelchairs are really popular with the old.
Based on the ordinary wheelchair, electric power wheelchair has the power plant. When choosing the material of electric source, the scientists think that both lead-acid cell and lithium cell are practical. In today's market, you can surely find different the electric power wheelchairs with lead-acid cell and lithium cell.

However, a few tests told us that lithium cell electric power wheelchair will be better than lead-acid cell electric power wheelchair. Although lead-acid cell are able to be produce cheap electric wheelchair. The content of the cell is small and the service life is also too short. Thus, many designers believe that lithium cell is more suitable to be used on the electric power wheelchair.
The lithium cell power wheelchairs have so many advantages that you should buy one for the old or those who are not able to move. Firstly, you can choose to push the wheelchair by power or by your hands. If you are walking with the one in the wheelchair, you can push the wheelchair by your hands. If the one who are not able to walk freely wants to go out by himself, he can use the power to make the wheelchair go to where he wants to go. Then since the lithium cell can be charged again and again, the service life of the electric power wheelchairs is very long, which can save your money. Besides, lithium cell is small, light and eco-friendly. Like ordinary wheelchair, this motor electric wheelchair can also be folded and put in the car when you are traveling.
Apart from this, electric power wheelchair with lithium cell has bandages made of PU and a safety belt, which can keep those in the wheelchair save when the wheelchair is moving by electricity. Moreover, this wheelchair can turn around with the control of the control column and people can also set different speed when they are doing different things. You may also wonder that when moved by electricity, the speed should be very fast. The design of intelligent electromagnetic brake and the manual brake is helpful to keep those in the wheelchair safe.
To draw a conclusion, electric power wheelchair with lithium cell will become the main stream of the electric power wheelchair in the future. And all the power wheelchair manufacturers should also concentrate on this profit point. No matter who master this technology, he will take the control of the electric power wheelchair market.
This article comes from: http://www.beiz-tech.com/news/40256.html

Main Classifications and Applications of Limit Switch

Various limit switches have been used in our daily life, such as rotary limit switches, piston limit switches or hinge limit switches and so on. What are they used for? Then, this article will introduce the main classifications and applications of the so-called limit switch.

First of all, what is the limit switch? Actually, it is a kind of appliance that can protect the built-in micro switch from being damaged by external harm, such as water, oil or dust and so on. When it comes to the classification, generally speaking, there are two main classification methods. One is operating principle and the other is the interior structure.
According to the working principle, it can be divided into operating limit switch and ultimate limit switch. The former is designed to send out the signal to mechanism, while the latter is used to prevent the accident being generated from the overlarge mechanism motion. However, based on the driving mechanism of the built-in micro switch, there is piston-type limit switch, hinge pendulum rod limit switch and rotary pendulum rod limit switch. The piston-type limit switch has two main varieties. One is sealed by O-shape ring, which enjoys excellent function of blocking scarps. The other one is based on sealing rubber, which has much better sealing property. Which one will be chosen is based on the practical application occasion. The hinge pendulum rod limit switch is in accordance with activity volume of the plunger to make sure the rod proportion. The rotary pendulum rod limit switch relies on coil spring to gain the reset force and cam wheel to drive kicker ram. Besides the mentioned three main types, limit switches manufacturers have produced many other ones so as to satisfy different occasions.
Then, what concrete applications do those limit switches have? Specifically speaking, the application area of the limit switches can be divided into daily life field and industrial manufacturer field. When it comes to the daily life, the LED push button switch can be seen in washing machine, video cassette recorder, dust collector, microwave oven, dryer and the likes. Take the washing machine for instance. As we all know, spin-dry course of washing machine asks for high rotate speed, which will do harm on people if their hands touch the cover. In order to stop such an accident, a limit switch can be adopted. Then, the power supply will be cut off once people close to machine. As to the industrial manufacturing area, the limit switch plays a key role in delivering the electrical signal of machinery movement so as to avoid the safety accidents and the machine tool is a typical application occasion.
This article comes from: http://www.tayee-electric.com/news/40258.html