Introduction to the basis of vacuum valve selection

The basis for considering the vacuum valve

There are low vacuum valves, high vacuum valves and ultra high vacuum valves depending on the working pressure.

According to the structural characteristics, there are flapper valves, flapper valves, butterfly valves, ball valves, diaphragm valves, angle valves, straight-through valves, and three-way valves.

According to the transmission principle, there are manual, pneumatic, electric and electromagnetic. Generally, the pneumatic is the process of the electromagnetic pilot and the cylinder performing the action, and the process of performing the action of the pilot valve cylinder can also be controlled by hand. Electric for both hands and electricity, when the power is off, you can manually operate. According to the material, stainless steel, carbon steel, aluminum alloy as the main material of the valve.

Metal-sealed and non-metallic sealed valves are also available depending on the material of the dynamic seal. O-ring rubber seal for shaft seal Generally, the vacuum seal of the vacuum seal has a leak rate of 10-4Pa.L/S. The vacuum is not high during the movement of the shaft. It can be used under the condition of high vacuum. The shaft seal is metal corrugated. The tube seal has a leak rate of 10-7Pa.L/S and is suitable for use under ultra-high vacuum conditions.