Check (Non-Return) Valves

 

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Check (Non-Return) Valves

Johnson Valves offer check (non-return) valves for wide range of applications, we offer various patterns and connections. We also offer Storm (Scupper) Valves for the marine industry and Screw Down Non-Return Valves (SDNR) which is a globe valve and lift check valve combined.

 

Check (non-return) valves, are used in pipeline systems to allow flow in one direction only. There are a number of reasons for using check (non-return) valves, which include:

 

Protection of any item of equipment that can be affected by reverse flow.
To check the pressure surges associated with hydraulic forces.
Prevention of flooding.
Prevention of reverse flow on system shutdown.
Prevention of flow under gravity.
Relief of vacuum conditions.

Body Materials

Aluminium Bronze

Bronze

Carbon Steel

Cast Iron

Ductile Iron

Plastic (ABS & uPVC)

Stainless Steel

Patterns

Ball

Disc

Lift

SDNR

Spring Loaded

Storm (Scupper)

Swing

Sealings

EPDM

Viton

Metal

NBR

PTFE

Connections

Flanged

Threaded (BSP & NPT)

Solvent Weld

Wafer