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 1 : protective cap 2 : Adjustment screw 3 : Blocking nut 4 : Diaphragm 5 : Piston 6 : Flat seal 7 : Sealing surface |
- Pressure relief valve for positive deplacement and centrifugal pumps
- In-line or bypass installation according the operating condition
The DHV 712-R maintains the upstream pressure at a set value to protect the piping in case of override pressure. The thrust of the pressure of fluid on the diaphragm must be greater than the spring strength to release the fluid by the outlet.
The diaphragm in EPDM (PTFE coated) separates the adjustment dry space (including the calibrated spring), from the lower space for flowing fluid. All wet parts are made of plastics; The adjustment screw is protected with a plastic cap and secured by a lock nut
| Body | PVC-U, PP, PVDF Options PTFE or stainless steel (on request) |
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| Diaphragm | EPDM, coated with PTFE | |
| Seals | EPDM or FPM (According body material) | |
| Fittings | Unions or male spigot ends (Flanges on request) | |
| Pressure adjustment range | 0.3 ... 10 bar | |
| Override pressure excess | 0.3 ... 0.5 bar | |
| Hysteresis | About 0.3 bar |
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EC Conformity: The instrument meets the legal requirements of the current
European Directives.
