PBV Series Back Pressure Valves
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.
Key Features and Benefits
o Available in PVC, CPVC, PP or PVDF Body with Noryl™ Molded Dome o PTFE/EPDM Diaphragm o Spring: 10 - 150 psi (Spring pre-set: 50 psi) o 304 Stainless Steel Bolting o FNPT Threads o Anti-Siphon Function o Adjustment Screw with Slot o 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
o ANSI or DIN / EN Threaded, Socket, True Union Socket or Flanged End Connections
o 0 - 50 psi and 10 - 250 psi Springs
o PTFE/FPM Diaphragm
o PVC Cell Class 12454 per ASTM D1784 o CPVC Cell Class 23447 per ASTM D1784 o PP per ASTM D4101 o Natural PVDF per ASTM D3222 Type 1