The R-K PBP series pressure bypass valve is a 3-port valve designed to relieve excess fluid pressure in piping systems. When mounted in-line, the pressure by-pass valve will permit fluid to pass through the system. When the fluid pressure approaches the valve setting, the excess fluid is vented through the bottom port.
Adjustable screw and lock-nut makes it easy to accurately pre-set relief pressure.
Wide working pressure range (10 to 80 PSIG)
Top entry for easy in-line maintenance and can be factory pre-set upon request.
No metal contact with fluid Note:This valve is not designed to be used in piping systems with back-pressure on the downstream side.
Upstream Pressure Vacuum to 150 PSIG
Relief Pressure 10 to 80 PSIG
Pressure differential Plus or Minus 5 PSIG from any pre-set pressure relief point.
Material ValveBody PVC Type 1, Grade 1
Diaphragm Primary Teflon
Pressure differential Plus or Minus 3 PSIG from any pre-set pressure relief point.
Temperature Range 0 F to 140 for PVC
0 F to 180 F for POLYPRO
0 F to 280 F for PVDF
0 F to 340 F for TEFLON
Valve ports 1/4" to 1" Valve FNPT
1.5" to 2" Valve MPT
All valves are fully ported
Mounting Method (4) 1/4" -20 tapped holes for
standard machine valve body.
(1/4" to 1.00")
Kalrez® and Viton® are registered trademarks of DuPont Dow Elastomers.
The chart below will specify R-K standard
valves regarding valve size, valve material, and seal material.
For special orders, please consult the factory for pricing
and delivery information.