Image for PBV Series Diaphragm Back Pressure Valves from Flow Control
PBV Series Diaphragm Back Pressure Valves
Product Description
All thermoplastic diaphragm Back Pressure Valve for chemical feed systems, applies back pressure to a metering pump to prevent siphoning and eliminates varying dosage rates resulting from fluctuating downstream pressure. All valves are preset for 50 psi, but are field adjustable via the adjustment screw.
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  • PVC, CPVC, PP or PVDF Body, and Noryl™ Molded Dome
  • PTFE/EPDM Diaphragm
  • 304 Stainless Steel Bolting
  • FNPT Threads
  • Adjustment Screw with Slot
  • Spring: 10 – 150 psi (Spring pre-set: 50 psi)
  • Anti-Siphon Function
  • PVC, CPVC and PVDF rated to 250 psi @ 70°F/17.2 Bar at 21°C, PP rated to 150 psi @ 70°F/10 Bar at 21°C


  • Chemical Dosing
  • Transfer and Processing
  • Chlorination Systems