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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 81-100 of 379 items

Set Descending Direction
Product SKU DESCRIPTION MANUFACTURER
3020C-650 3020C-650 Straight-Thru Pressure Relief Valve, 1/2 NPT X 5/8 SAE, 650 PSI, Discharge Capacity: 40.5 Superior HVACR
3020C-700 3020C-700 Straight-Thru Pressure Relief Valve, 1/2 NPT X 5/8 SAE, 700 PSI, Discharge Capacity: 43.5 Superior HVACR
3020C-750 3020C-750 Straight-Thru Pressure Relief Valve, 1/2 NPT X 5/8 SAE, 750 PSI, Discharge Capacity: 46.6 Superior HVACR
3020C-800 3020C-800 Straight-Thru Pressure Relief Valve, 1/2 NPT X 5/8 SAE, 800 PSI, Discharge Capacity: 49.7 Superior HVACR
Pressure Relief Valve 3030-235 Female Connection Pressure Relief Valve, 1/2 NPT x 1/2 FPT, 235 PSI, Discharge Capacity: 36.9 Superior HVACR
Female Connection Pressure Relief Valve, 1/2 NPT x 1/2 FPT, 300 PSI, Discharge Capacity: 46.6 3030-300 Female Connection Pressure Relief Valve, 1/2 NPT x 1/2 FPT, 300 PSI, Discharge Capacity: 46.6 Superior HVACR
Female Connection Pressure Relief Valve, 1/2 NPT x 1/2 FPT, 350 PSI, Discharge Capacity: 54.0 3030-350 Female Connection Pressure Relief Valve, 1/2 NPT x 1/2 FPT, 350 PSI, Discharge Capacity: 54.0 Superior HVACR
PRV 3030-400 Female Connection Pressure Relief Valve, 1/2 NPT x 1/2 FPT, 400 PSI, Discharge Capacity: 61.4 Superior HVACR
PRV 3030-425 Female Connection Pressure Relief Valve, 1/2 NPT x 1/2 FPT, 425 PSI, Discharge Capacity: 65.1 Superior HVACR
PRV 3030-450 Female Connection Pressure Relief Valve, 1/2 NPT x 1/2 FPT, 450 PSI, Discharge Capacity: 68.8 Superior HVACR
PRV 3045-235 Female Connection Pressure Relief Valve, 3/4 NPT x 3/4 FPT, 235 PSI, Discharge Capacity: 36.9 Superior HVACR
PRV 3045-300 Female Connection Pressure Relief Valve, 3/4 NPT x 3/4 FPT, 300 PSI, Discharge Capacity: 46.6 Superior HVACR
PRV 3045-350 Female Connection Pressure Relief Valve, 3/4 NPT x 3/4 FPT, 350 PSI, Discharge Capacity: 54.0 Superior HVACR
Female Connection Pressure Relief Valve, 3/4 NPT x 3/4 FPT, 400 PSI, Discharge Capacity: 61.4 3045-400 Female Connection Pressure Relief Valve, 3/4 NPT x 3/4 FPT, 400 PSI, Discharge Capacity: 61.4 Superior HVACR
PRV 3045-425 Female Connection Pressure Relief Valve, 3/4 NPT x 3/4 FPT, 425 PSI, Discharge Capacity: 65.1 Superior HVACR
PRV 3045-450 Female Connection Pressure Relief Valve, 3/4 NPT x 3/4 FPT, 450 PSI, Discharge Capacity: 68.8 Superior HVACR
1 3060-235 Female Connection Pressure Relief Valve, 1 NPT x 1 FPT, 235 PSI, Discharge Capacity: 88.0 Superior HVACR
PRV 3060-300 Female Connection Pressure Relief Valve, 1 NPT x 1 FPT, 300 PSI, Discharge Capacity: 111.0 Superior HVACR
1 3075-235 Female Connection Pressure Relief Valve, 1 1/4 NPT x 1 1/4 FPT, 235 PSI, Discharge Capacity: 111.0 Superior HVACR
PRV 3075-300 Female Connection Pressure Relief Valve, 1 1/4 NPT x 1 1/4 FPT, 300 PSI, Discharge Capacity: 111.0 Superior HVACR
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