Circle Valve Technologies Inc.
1533 Gehman Road
Harleysville, PA 19438

Toll Free:800-645-6733
Phone: 267-933-6300
Fax: 267-933-6305
Email: [email protected]
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Features
  • 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
HP500 Series Relief Valve
Unit of Measure
1 2 

Item #

Body Material

O-Ring Material

Valve Size

End Connections (Inlet/Outlet)

Cracking Pressure

Operating Temperature

Weight

HP532B-2M N/A Brass N/A Viton® N/A 1/4 in N/A Popoff male pipe N/A 150 to 575 psig N/A -20 to 400 ºF N/A .06 lbs
HP532B-2MP N/A Brass N/A Viton® N/A 1/4 in N/A Inline male pipe by female pipe N/A 150 to 575 psig N/A -20 to 400 ºF N/A .16 lbs
HP532B-4M N/A Brass N/A Viton® N/A 1/2 in N/A Popoff male pipe N/A 150 to 450 psig N/A -20 to 400 ºF N/A .27 lbs
HP532B-4MP N/A Brass N/A Viton® N/A 1/2 in N/A Inline male pipe by female pipe N/A 150 to 450 psig N/A -20 to 400 ºF N/A .6 lbs
HP559B-2M N/A Brass N/A Buna N N/A 1/4 in N/A Popoff male pipe N/A 150 to 575 psig N/A -65 to 275 ºF N/A .06 lbs
HP559B-2MP N/A Brass N/A Buna N N/A 1/4 in N/A Inline male pipe by female pipe N/A 150 to 575 psig N/A -65 to 275 ºF N/A .16 lbs
HP559B-4M N/A Brass N/A Buna N N/A 1/2 in N/A Popoff male pipe N/A 150 to 450 psig N/A -65 to 275 ºF N/A .27 lbs
HP559B-4MP N/A Brass N/A Buna N N/A 1/2 in N/A Inline male pipe by female pipe N/A 150 to 450 psig N/A -65 to 275 ºF N/A .6 lbs
HP533B-2M N/A Brass N/A Neoprene N/A 1/4 in N/A Popoff male pipe N/A 150 to 575 psig N/A -40 to 300 ºF N/A .06 lbs
HP533B-2MP N/A Brass N/A Neoprene N/A 1/4 in N/A Inline male pipe by female pipe N/A 150 to 575 psig N/A -40 to 300 ºF N/A .16 lbs
HP533B-4M N/A Brass N/A Neoprene N/A 1/2 in N/A Popoff male pipe N/A 150 to 450 psig N/A -40 to 300 ºF N/A .27 lbs
HP533B-4MP N/A Brass N/A Neoprene N/A 1/2 in N/A Inline male pipe by female pipe N/A 150 to 450 psig N/A -40 to 300 ºF N/A .6 lbs
HP562B-2M N/A Brass N/A Ethylene Propylene N/A 1/4 in N/A Popoff male pipe N/A 150 to 575 psig N/A -65 to 300 ºF N/A .06 lbs
HP562B-2MP N/A Brass N/A Ethylene Propylene N/A 1/4 in N/A Inline male pipe by female pipe N/A 150 to 575 psig N/A -65 to 300 ºF N/A .16 lbs
HP562B-4M N/A Brass N/A Ethylene Propylene N/A 1/2 in N/A Popoff male pipe N/A 150 to 450 psig N/A -65 to 300 ºF N/A .27 lbs
HP562B-4MP N/A Brass N/A Ethylene Propylene N/A 1/2 in N/A Inline male pipe by female pipe N/A 150 to 450 psig N/A -65 to 300 ºF N/A .6 lbs
HP532T1-2M N/A 316 Stainless Steel N/A Viton® N/A 1/4 in N/A Popoff male pipe N/A 150 to 575 psig N/A -20 to 400 ºF N/A .06 lbs
HP532T1-2MP N/A 316 Stainless Steel N/A Viton® N/A 1/4 in N/A Inline male pipe by female pipe N/A 150 to 575 psig N/A -20 to 400 ºF N/A .16 lbs
HP532T1-4M N/A 316 Stainless Steel N/A Viton® N/A 1/2 in N/A Popoff male pipe N/A 150 to 450 psig N/A -20 to 400 ºF N/A .27 lbs
HP532T1-4MP N/A 316 Stainless Steel N/A Viton® N/A 1/2 in N/A Inline male pipe by female pipe N/A 150 to 450 psig N/A -20 to 400 ºF N/A .6 lbs
HP559T1-2M N/A 316 Stainless Steel N/A Buna N N/A 1/4 in N/A Popoff male pipe N/A 150 to 575 psig N/A -65 to 275 ºF N/A .06 lbs
HP559T1-2MP N/A 316 Stainless Steel N/A Buna N N/A 1/4 in N/A Inline male pipe by female pipe N/A 150 to 575 psig N/A -65 to 275 ºF N/A .16 lbs
HP559T1-4M N/A 316 Stainless Steel N/A Buna N N/A 1/2 in N/A Popoff male pipe N/A 150 to 450 psig N/A -65 to 275 ºF N/A .27 lbs
HP559T1-4MP N/A 316 Stainless Steel N/A Buna N N/A 1/2 in N/A Inline male pipe by female pipe N/A 150 to 450 psig N/A -65 to 275 ºF N/A .6 lbs
HP533T1-2M N/A 316 Stainless Steel N/A Neoprene N/A 1/4 in N/A Popoff male pipe N/A 150 to 575 psig N/A -40 to 300 ºF N/A .06 lbs
Unit of Measure
1 2