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Casing Relief Valves

  The Cla-Val Model 55L (UL Listed FM approved) Pressure Relief Valve is a direct-acting, spring loaded, diaphragm type relief valve. The valve may be installed in any position and will open and close within very close pressure limits.

The Model 55L is normally held closed by the force of the compression spring above the diaphragm. When the controlling pressure applied under the diaphragm exceeds the spring setting, the disc is lifted off its seat, permitting flow through the control. When control pressure drops below the spring setting, the spring forces the control back to its normally closed position. The controlling pressure is applied to the chamber beneath the diaphragm through an external tube on the 55L.  Read more. (PDF)







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The Kunkle Models 19, 20 and 200 Extra heavy, rugged construction. Both inlet and outlet connections are cast integral with body to permit easy inspection and servicing without disconnecting piping. Seats lapped for optimum performance. Spherical pivot between disc and spring corrects misalignment and compensates for spring side thrust. Specifications: Sizes: 1/2″ to 3″ [15 to 80 mm] Pressure/Temperature Limits: 300 psig [20.7 barg]/406°F [208°C] Applications:

• Overpressure relief and protection of pumps, tanks, lines and hydraulic systems.

• Pressure regulation.

• Continuous bypass relief.

Request KUKMC-0376-US

For Pricing and availability call (866) 522-0396                                              Read more. (PDF)

   W.L.Hamilton Pressure Relief Valve

By-Pass Relief Valves  are spring controlled for spray pressures to 600 PSI. Tee Handle permits changing to higher or lower pressures. Adjusting stem locknut to maintain pressure setting. Floating stainless steel ball and Buna-N Washer automatically adjusts to pressure variation.


Read more. (PDF)





For Pricing and availability call (866) 522-0396


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