Screw vacuum pump start-up and shutdown steps

The screw vacuum pump is equipped with a migrant rotor with fixed blades, which throws water into the stator wall. The water forms a liquid ring concentric with the stator, and the liquid ring and the rotor blade together form a variable volume rotary displacement vacuum pump. So what are the starting and stopping processes of screw vacuum pumps? Here we will understand in detail.

A screw vacuum pump that has been shut down for a long period of time has been started and needs to be rolled several times by hand to prove that the pump is not jammed or otherwise damaged. At this point the need to open the exhaust valve, start the motor, but pay attention to the positive rotation of the motor, and then gradually add water supply, water supply compliance rules to request a stop, at this point should be careful not to do the task of vacuum pump.

When the screw vacuum pump stops, if there is a valve in the intake pipe, the valve on the intake pipe should be blocked at this moment, then the water supply pipe should be blocked, and the vacuum pump should be shut down quickly, and also pay attention to the water in the cavity of the screw vacuum pump should be released after the shutdown, to avoid re-starting, will constitute a blade and pump shaft cracking.