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Pressure Relief Valves

Our pressure relief valves are designed to protect industrial piping systems and vessels from over-pressurization. These valves open when there\'s an increase from the set pressure, and close when the level drops before the set pressure.

Three functional elements of a HVAC pressure relief valve:

  • Valve element – typically a spring-loaded poppet valve
  • Sensing element – a piston or a diaphragm
  • Reference force element – usually a spring

 

When selecting a pressure relief valve, special care should be taken. We at Evergreen recommend customers browse through our stock of atmospheric pressure relief valves, straight through pressure relief valves, & female connection pressure relief valves to select the type that best serves your specific purpose.

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Pressure Relief Valves - PRV - Evergreen Midwest Co.

Showing 121-140 of 379 items

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Product SKU DESCRIPTION MANUFACTURER
angled pressure relief valves 3220-400 Angled Pressure Relief Valves, 1/2 NPT x 5/8 SAE, 400 PSI, Discharge Capacity 26.8 Superior HVACR
angled pressure relief valves 3220-425 Angled Pressure Relief Valves, 1/2 NPT x 5/8 SAE, 425 PSI, Discharge Capacity 28.4 Superior HVACR
angled pressure relief valves 3220-450 Angled Pressure Relief Valves, 1/2 NPT x 5/8 SAE, 450 PSI, Discharge Capacity 30.1 Superior HVACR
angled pressure relief valves 3220-500 Angled Pressure Relief Valves, 1/2 NPT x 5/8 SAE, 500 PSI, Discharge Capacity 33.3 Superior HVACR
angled pressure relief valves 3220C-600 Angled Pressure Relief Valves, 1/2 NPT x 5/8 SAE, 600 PSI, Discharge Capacity 39.9 Superior HVACR
angled pressure relief valves 3220C-650 Angled Pressure Relief Valves, 1/2 NPT x 5/8 SAE, 650 PSI, Discharge Capacity 43.1 Superior HVACR
angled pressure relief valves 3220C-700 Angled Pressure Relief Valves, 1/2 NPT x 5/8 SAE, 700 PSI, Discharge Capacity 46.4 Superior HVACR
nut assembly 7560-55 Bolt, Stud and Nut Assembly Rego
nut 7560-56 Bolt, Stud, Nut - Manhole Cover Plate Rego
959BX10 959BX10-600 Safety Device Approved by Bureau of Explosives, File 25-16-242-25AG. Water Capacity 538 LBS for Liquefied Gas. Sherwood Spec
1 959BX2-475 Safety Device Approved by Bureau of Explosives, File 25-16-242-25AG. Water Capacity 538 LBS for Liquefied Gas. Sherwood Spec
959BX5-E-375 959BX5-E-375 Safety Device Approved by Bureau of Explosives, File 25-16-242-25AG. Water Capacity 538 LBS for Liquefied Gas. Sherwood Spec
1 959BX5-E-450 Safety Device Approved by Bureau of Explosives, File 25-16-242-25AG. Water Capacity 538 LBS for Liquefied Gas. Sherwood Spec
375 959BX8-E-375 Safety Device Approved by Bureau of Explosives, File 25-16-242-25AG. Water Capacity 538 LBS for Liquefied Gas. Sherwood Spec
AR AR4104A100 Pressure Relief Valve, Angle, ASME 1/2" x 1" 100 PSI SET PRESSURE Rego
AR AR4106A100 Pressure Relief Valve, Angle, ASME 3/4" x 1" 100 PSI Rego
ARV ARV250B ARV - Adjustable Liquid Relief Valve - 1/4" NPT Male x 3/8" NPT Female Rego
NPT outlet B-19434-5 1/2" F.NPT outlet for B & C - 19434B Series Rego
1/2" NPT Set 235 PSIG ASME B-19434B235 1/2" NPT Set 235 PSIG ASME Rego
1/2" NPT Set 250 PSIG ASME B-19434B250 1/2" NPT Set 250 PSIG ASME Rego
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