Rotary Vane Vacuum Pump Gas Ballast Valve: The rotary vane pump is designed to pump out condensable gas and consists of a throttle valve and a check valve. The throttle valve controls the amount of mixed gas. When the gas pressure in the pump chamber is higher than the mixed gas pressure, the check valve prevents backflow. In order to return oil and inject oil into the pump, improve the lubrication conditions of the pump and expand the application range of the pump, the rotary vane pump is also equipped with many accessories, such as oil mist trap, molecular filter, dust particle filter, chemical filter , oil filter, etc.

Rotary vane vacuum pump performance parameters

The performance parameters of rotary vane vacuum pump include ultimate pressure, pumping rate, power, temperature rise, vibration, noise and life. The most important thing is the ultimate pressure of the pump, the pumping rate, and the motor power. Ultimate pressure: the lowest stable pressure obtained by the pump, in Pa, related to the following factors:

a. The type of vacuum gauge used by the rotary vane vacuum pump to measure the pressure is related to the type of the vacuum gauge. b. Pump oil circulation c. It is related to the working temperature of the pump oil: the higher the oil temperature, the higher the saturated vapor pressure of the oil, and the lower the ultimate vacuum of the pump. d. The rotary vane vacuum pump is related to the harmful space between the contact point of the pump cavity and the exhaust port. The gas in the harmful space cannot be discharged from the pump cavity by the rotary vane pump, but will be brought back to the suction side, resulting in an increase in the limit pressure. High, the circulating pump oil in the pump is filled into the harmful space, which can eliminate the influence of the harmful space on the ultimate pressure. e. Machining accuracy of parts, clearance between moving parts, shaft end seals, etc.

Pumping rate of rotary vane vacuum pump: the volume of gas discharged per unit time, the unit is L.S-1. Motor power: related to compressing gas, overcoming friction, and overloading.