How to purge the screw vacuum pump

The screw vacuum pump is an air pumping device that USES a pair of screws to perform reverse rotation at the same pace in the pump shell to provide suction and exhaust functions. It can be applied in the field with more dust. Therefore, it is a basic job to carry out purging of the screw vacuum pump

I. cleaning and purging

Screw vacuum pump cleaning purge is mainly used to remove corrosive, harmful or thick substances, such as: tree esters.

Clean and purge usually before stopping the pump, turn off the gate valve of the inlet of the screw vacuum pump, and run it for 20 ~ 30 minutes after filling the inlet with hydrogen or water steam, to purge the screw vacuum pump cavity screw, and clean the residual process steam or thick adhesive material on the surface of the cavity.

Refrigeration purge

Refrigeration purge is used to refrigerate the inner cavity of the screw stator and screw vacuum pump.

Screw vacuum pump, air inlet into the process of gas absorption as the rotation of the screw of the stator is narrow and sent to the air outlet, shrinking process RGL body temperature rising, this needs to maintain with refrigeration purging screw vacuum pump is not due to overtemperature stuck dead gas will be used for refrigeration and scavenging substances, but under special conditions with hydrogen or cooling process after gas purging material. A filter is installed around the outlet of the screw vacuum pump to absorb gas to maintain the cooling purge.

3. Sealing blow

Sealing purge is to use hydrogen gas to pressure the back end cover of the screw vacuum pump to prevent the process steam or liquid from entering the engine cover with tooth shaft and bearing shaft.

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