Griffco Valve, PRG300P, G-Series Pressure Relief Valve, 3" Size, Material PVC, Flanged Connection
Features:
- Molded Noryl Top
- High Reliability / Low Cost
- Molded PTFE/EPDM Diaphragm
- Adjustable 10 - 150 Psi
- Ventable to Suction Line
- Robust, Machined Construction
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. The valves are pre-set at 50 Psi, however they are field adjustable from 10 - 150 Psi, (up to 350 Psi) via the adjustment screw. The relief valve should be set approximately 15 Psi higher than the system pressure. Installation should be made as close to the pump as possible, without any valves or accessories between the relief valve and the pump.
Griffco G-Series diaphragm pressure relief valves are designed to protect chemical feed systems from over pressure damage caused by defective equipment or a blockage in the chemical feed line. Robust construction ensures reliability in the rigorous service of municipal and industrial applications.
For more information, please see 
Data Sheet
