Griffco Valve, BPG155S1FOSS, G-Series 1-1/2" Medium-Flow Back Pressure Valve 316 SS, 50 psi Spring, PTFE/EPDM Diaphragm, Flange Connection, 316 SS Top
Features:
- Anti-siphon function
- Solid, robust, machined construction
- Flange Connection
- 316 Stainless Steel Top
- Valve body material - 316 Stainless Steel
- Molded PTFE/EPDM diaphragm
- Adjustable up to 50 psi
- Valve size 1-1/2"
- Tamper-resistant adjustment screw
- High reliability at affordable price
- Long diaphragm life
- Factory or field settable
Griffco G-Series back pressure valve is designed to enhance the performance of chemical feed systems by applying a continuous back pressure to the chemical feed pump, while also acting as an anti-siphon valve. Robust construction ensures reliability in the rigorous service of municipal and industrial applications.
Operation
Griffco diaphragm back pressure valve 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.
The valve is preset for 50 psi. Installation should be as close to the injection point as possible to prevent chemical line drainage and it is most important that all chemical system equipment such as pulsation dampeners and pressure gauges are between the pump and back pressure valve.
For more information, please see 
Data Sheet and User Manual
