A vacuum is a given space with a gas pressure below 101,325pa. In a vacuum, the pressure of the gas, the fineness is generally expressed in natural gas, the smaller the pressure value, the thinner the gas. There are many kinds of industrial vacuum pumps, pump performance test methods need to be t...

In the process of chemical production, can work according to the detailed process of the requested pressure fluctuation and the nature of the suction gas reasonable select vacuum pump, firstly a detailed process required working pressure, negative pressure distillation, distillation and sublimati...

The core components of molecular pumps are rotating blades and fixed blades. The speed of rotating blade reaches 1800 ~ 90000rpm, and the speed of blade end reaches hundreds of m/s, which is close to the average speed of molecules. The gas molecules are transported to the exhaust port through the...

The pumping speed of the oil diffusion pump remains unchanged within a wide range of inlet pressure. At this time, the pumping speed of the pump is independent of inlet pressure. However, under low and high inlet pressure, the pumping speed of the pump tends to decrease. In the low inlet pressure...

The vacuum pump is made up of: pump cover, pump body, disk, impeller, mechanical seal, motor and other parts. Properly assembling the impeller on the shaft can ensure that the water ring vacuum pump has good volume efficiency and prevent vibration. Vacuum pump impeller center hole there is a scre...

Roots pump is a kind of rotary varactor vacuum pump, will only be used with backing pump with, in a wider range of pressure pumping speed, greatly to be pumping gas containing dust and water vapor is not sensitive, it is widely used in metallurgy, chemical industry, food, electronic plating, etc....

A vacuum valve is a vacuum system element used in a vacuum system to change the direction of the air flow, adjust the size of the air flow, and cut off or connect pipes. The vacuum valve closure is sealed with a rubber seal or metal seal. The bellows of the bellows globe valve are made of stainle...

The vacuum is obtained by means of the vacuum pump. Different types of pump, it has certain working conditions and range, when choosing vacuum pump, it should take full consideration of its characteristics and specifications, and start from the following four conditions of the designed system. (1...

2 x type rotary vane vacuum pump to the two-stage structure and its working performance levels by high pressure and low pressure of two parts, its inlet connected to the vacuum container or a vacuum equipment, when operating the gas will be a lot of suction and discharge container. When equipment...

Because the working principle of various electric vacuum devices is based on electric and magnetic fields to control the movement of electrons in space so as to enlarge, oscillate and display images. And vacuum pump system can prevent the electrons and the collision of gas molecules, ensure that ...