Check valve

Also for cryogenic use
Check valve.jpg

pdfDatasheet CL4 check valve
English 496 KB ver. 15.0



A check valve is a valve that normally allows fluid (liquid or gas) to flow through it in only one direction and so designed to prevent any flow reversal of fluids. An arrow marked on the body shows which way it most be installed. Vertical mounting is advised on an upward flow. In case of an horizontal mounting, the pressure difference between downstream and upstream to ensure sealing should be at least 1bar.

Sizes DN 10 tot DN 50
Reduced bore and Full bore
Max. pressure* 80 bar
Temp. range -200°C to 200C
Connections ISO, ASME, DIN, SMS, S10, S40
Type of connections Butt weld, Socket weld, Thread (NPT and BSP), Compression fittings, Triclamp ends, Orbital welding
Material - Body, connections: 1.4404 (316L)
- Seals: PTFE
Certificates 3.1 and CE/PED

* Max. pressure is depending on the temperature. See the Pressure/Temperature diagrams for more information.


  • Other materials: 304L, carbon 904L, Hastelloy C22
  • Client specific connections
  • Cryogenics applications
  • Degreased version for oxygen application