This valve protects pumps and pipes from pump startup and shutoff pressure surges due to power failure.
Pump off means valve normally closed. If pump starting cause pressure surge, the pilot smoothly opens the valve to limit pressure rising. Quick relief valve opens due to both pressure rises and falls, fully reducing any pressure fluctuation.
The valve closes totally the pipe line when back flow occurs. The valve is complete with an hydraulic control circuit able to regulate operation’s speed during closing, preventing surge.
Valvola a sfera in acciaio al carbonio A352-LCB brunito, con sfera ed asta in acciaio inox AISI 304, con connessione organo di comando ISO 5211, filettatura F/F, a passaggio totale.
Limiti di temperatura:-20° +160°
Vuoto:10-2 torr
Valvola a sfera in acciaio al carbonio A352-LCB brunito, con sfera ed asta in acciaio inox AISI 304, con connessione organo di comando ISO 5211, filettatura F/F, a passaggio totale.
NPT B.1.20.1 F/F
Limiti di temperatura:-20° +160°
Vuoto:10-2 torr
Valvola a sfera in acciaio al carbonio A351-LCB brunito, con sfera ed asta in acciaio inox AISI 304, filettatura F/F, a passaggio totale.
Limiti di temperatura:-20° +160°
The valve maintains downstream pressure to a constant and pre-set rate of upstream value. No pilots needed. The valve chamber is directly exposed to the downstream pressure and this varying pressure value modulates the valve to open or close according to upstream pressure.
Valvola a sfera in acciaio inox AISI 316-CF8M, con connessione organo di comando ISO 5211, filettatura F/F, a passaggio totale
Limiti di temperatura:-20° +160°
Vuoto:10-2 torr
The valve controls tanks and reservoirs emptying and avoids overflow.
The valve operates by means of a differential hydraulic float complete with regulating levels mounted on the tank side. The float maintains the valve closed and opens only when the minimum pre-set level is reached. Once the valve is open, float allows tank inlet until maximum water level is reached again.