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Design Features
The R-K SBR series diaphragm pressure relief valve is designed to protect piping and equipment from pressure changes where a rapid release of excess pressure is required. Prevents pumps from dead heading, over pressurization, pressure surge conditions, and maintains back pressure in closed loop systems.
Adjustable screw and lock-nut makes it easy to accurately pre-set desired relief pressure
Teflon (primary) and EPDM (back-up) diaphragms standard.
No Metal contact with fluid
Wide adjustable relief pressure range (10-125 PSI)
Small pressure differential band from cracking point to fully open, and from fully open to close.
Top entry makes in-line maintenance quick and easy.
Ideal for DI water, harsh chemical, and other high purity applications.
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Diaphragm Pressure Relief Valve
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Specifications
Upstream Pressure Vacuum to 150 PSIG
Relief Pressure 1/4" to 3/4" 10-125 PSIG
1" 10-100 PSIG
1-1/2" & 2" 10-60 PSIG
Material ValveBody PVC Type 1, Grade 1
Polypropylene
PVDF
Teflon
Piston Teflon
Diaphragm Primary Teflon
Backup EPDM
Seal EPDM
Viton(R)
Kalrez(R)
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.
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Order
Information
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.
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