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All Categories > Relief Valves > HP500 Series Relief Valves 150 to 575 psig > Item # HP532B-2M  
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Item # HP532B-2M, High Pressure Popoff Relief Valves

List Price $38.45

  • Very accurate cracking pressure
  • Zero leakage up to 95% of cracking pressure
  • 100% seat leakage tested
  • Tamper-proof adjustment
  • PED certifications and CE marking available for most models
Proper filtration is recommended to prevent damage to sealing surfaces.

Circle Seal Pressure Relief Valve HP500 Series

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Dimensional Drawing

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Unit of Measure: Imperial | Metric | Both 

Specifications · Applications · Leakage · Safety




Operating Pressure

150 to 575 psig
10 to 40 bar

Body Material


O-Ring Material


Valve Size

1/4 in

End Connections (Inlet/Outlet)

Popoff male pipe

Cracking Pressure

150 to 575 psig

Cracking Pressure Tolerance


Operating Temperature

-20 to 400 ºF

Spring Material

17-7 PH Stainless Steel

Dim. A

1.17 in


5/8 in

Shipping Weight

.06 Pound


.06 lbs

  • System overpressure protection
  • Storage tanks
  • Freon® recovery systems
  • Medical equipment
  • Refrigeration & heating equipment
  • Measuring & dispensing pumps
  • Communications equipment
  • Process control instruments
  • R & D pilot plants

Leakage: Ascending pressure 0 up to 95% of cracking pressure

Reseal pressure: 90% of cracking pressure

Leakage at Reseal pressure: Zero

For Your Safety
It is solely the responsibility of the system designer and user to select products suitable for their specific application requirements and to ensure proper installation, operation, and maintenance of these products. Material compatibility, product ratings and application details should be considered in the selection. Improper selection or use of products described herein can cause personal injury or property damage.


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