Some Knowledge About Check Valve

2021-07-03

Check Valve is Also Called Check Valve. Check Valve is An Automatic Valve.

It relies on the pressure of flowing medium in the pipeline to push the valve disc to close and open the valve. When the medium stops flowing, the check valve disc will close. It can effectively prevent the medium in the pipeline from backflow. Check valve plays a great role in ensuring the safety of the pipeline.



According to The Structure of Check Valve:

  • It can be divided into lift check valve, swing check valve and butterfly check valve
  • Lift check valve can be divided into vertical check valve and straight check valve
  • Swing check valve is divided into single check valve, double check valve and multi check valve
  • Butterfly check valve is divided into double plate butterfly check valve and single plate butterfly check valve
  • According to the connection form, check valve can be divided into threaded check valve, flange check valve, welded check valve and clip check valve.



Material of Check Valve

Check valve material can be selected according to the medium, body material: stainless steel, cast steel, cast iron, ductile iron, etc.

Body
Cast iron, Stainless steel, cast steel, ductile steel
Disc
Ductile iron with zinc plated or AL-bronze/stainless steel
Stem
Stainless Steel
Spring
Stainless steel
Rubber gasket
NBR/EPDM

How to Choose Check Valve

When the user inquires with us, we want to know the valve caliber, pressure, medium, temperature, link mode, etc. you require. We will recommend the valve according to these.

DN (mm)
50~800
PN (mm)
1.0~2.5
Slowly-closing time
3~60s
Applicable Medium
Clean water,sewage and seawater
Connection
Wafer
Design temperature
0~80℃
Design standard
Face to Face is according to ISO Standard
Inspection and Test Standard
API598

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