Griffco Valve, BPU050PH, Uni-Body Back Pressure Valve, 1/2" Size, PVC Valve Body, Union Connection, Hypalon O-ring
Features:
- Completely machined body
- No seals or glued connections
- Union style connections
- Adjustable Pressure Settings
- Anti-Siphon Function
- Composite PTFE/EPDM Diaphragm
- NSF certified (PVC only)
Griffco's unibody valve is the latest innovation to ensure leak-free connections and operation. This design allows flexibility of changing connection types, ease of maintenance, and eliminates additional system components (extra unions); saving time and money. As with all of the Griffco designs, the chemical feed system is safeguarded by either applying a continuous back pressure to the chemical feed pump, while also acting as an anti-siphon valve or allowing for system pressure relief (2-port only) in case of an upset condition. This construction ensures increased leak-free reliability in the rigorous service of municipal and industrial applications.
Griffco diaphragm back pressure valves apply positive discharge pressure to a metering pump system to prevent siphoning and eliminate varying dosage rates caused by fluctuating downstream pressure. The diaphragm is held against the valve seat by an internal spring. When the preset pressure is exceeded, the diaphragm is forced up and chemical flows through the valve to the injection point. Griffco diaphragm pressure relief valves operate when the pressure in the chemical system exceeds the preset pressure of the valve. The diaphragm is held against the valve seat by an internal spring. When the preset pressure is exceeded the diaphragm is forced up and the chemical flows out the relief port, back to the chemical tank or to the suction side of the pump.
For more information, please see 
Data Sheet
