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Back pressure and pressure relief valves

Griffco diaphragm back pressure valves and diaphragm pressure relief valves are designed to enhance the performance of chemical (dosing) pump systems by applying a continuous back pressure to the chemical feed pump, while also acting as an anti-syphon valve. The robust construction ensures reliability in heavy-duty industrial applications, among others.
Griffco offers back pressure valves and pressure relief valves with multiple options and material choices. This makes the Griffco back pressure valves and pressure relief valves suitable for almost all applications. Virtually all connection options are available: from threaded to flanged, from DN8 to DN100. Pressure ranges from 0.7 to even 275 bar. Choice of materials in plastics from PVC, PP, PVDF, PTFE to CPVC and in metals from 304 SS, 316 SS, Alloy-20 to even Hastelloy-C.

Pressure relief valves
Pressure relief valves

There are 5 types of back pressure valves:

Small connections
(1/4″ to 1/2″ or DN 8 to DN 15)

Average to large connections
(1/2″ to 4″ or DN 15 to DN 100)

(connections from 1/2″ to 2″
or DN 15 to DN 50)

Medium pressure up to 55 bar
(1/2″ to 1″ or DN 15 to DN 25)

High pressure up to 275 bar
(1/4″ to 1″ or DN 8 to DN 25)