1″ BSP PVC-U PLV (griffco)

  • Pressure Loading/Relief Valve
  • 375 lph max flow
  • PVC body, PTFE diaphragm
  • 1″ BSP

2 in stock

SKU: BPG100-PB Category:


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. The valves are preset for 3.5 bar, however they are field adjustable from 1 – 10 bar via the adjustment screw. 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.



Griffco’s new molded Noryl top extends the temperature and pressure rating of the standard valves. New valve designs continue 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. New construction ensures increased reliability in the rigorous service of municipal and industrial applications. Wetted materials include: PVC, CPVC, PP, PVDF, PTFE, 316 SS, A 20 and Hast. C. Available sizes: DN8, DN10 and DN15.


NEW Molded Noryl Top

High Reliability / Low Cost

Compact Size for OEM Applications

Adjustable Pressure Settings

Optional 25 Bar Rated Metal Valve

Anti-Siphon Function

Robust, Machined Body Construction

Vulcanised PTFE/EPDM Diaphragm

Wide Range of Materials

ISO 9001 Certified

Additional information

Weight 2 kg

Valve Type

Max Pressure

Pressure Setting Range