The principle of anti-return device for vacuum pump

Two-stage rotary vane vacuum pump is belonging to an oil-sealed vacuum pump. In order to prevent the vacuum pump oil from returning to the pumped container when the pump is stopped, the built-in stop pump anti-return device is very important.

Preventing pump back oil is usually achieved by a combination of gas path and oil path. Common methods are:

1. Set the pump stop anti-return device on the intake passage
2. There is a pump stop control anti-return device on the oil road.
3, the above two combinations

Two-stage rotary vane vacuum pump
During the operation of the 2XZ series two-stage rotary vane pump, the control piston is kept sealed against the spring under the action of oil pressure. The valve disc of the anti-backup valve is kept in a lower position due to its own weight (valve open). After the pump is stopped, the oil pressure drops and the spring will control the piston to the top. This creates a path between the fuel tank and the piston of the anti-backup valve.

2XZ series two-stage rotary vane pump
tags: Rotary vane vacuum pump, Two stage rotary vane vacuum pump
Edited by Catherine Qin / EVP Vacuum Solution

Contact us

If possible, kindly suggest please your working industry/process, working pressure, working medium, etc. Given detailed request helps to gain better-matched customized solution. Thanks for your patience.

your request will be responsed within 3 hours, kindly pay attention to your email please.


Three-blade Roots Blower

Posted on Thu, 06 May 2021 07:35:38 +0000

Liquid ring vacuum system In Building material steam recovery

Posted on Wed, 05 May 2021 06:07:19 +0000

Steam ejector vacuum pump for vacuum distillation tower of oil refinery

Posted on Tue, 04 May 2021 05:33:45 +0000

Molecular pump for Mass Spectrometer

Posted on Mon, 03 May 2021 05:33:28 +0000

steam jet in evaporation system of application

Posted on Sun, 02 May 2021 05:08:23 +0000

water ring compressor used in environmental protection sewage treatment

Posted on Sat, 01 May 2021 03:21:45 +0000