Pressure
Relief Valves

Pressure relief valves are designed and engineered to provide high-volume discharge primarily for use on liquid receiver applications above the liquid refrigerant level. Models are available with multiple seat configurations, high pressure settings, and certified for use with R410a refrigerant. Combine a relief valve with rupture disc to relieve an over pressure condition and pressure gauge to reveal visual indication.

Pressure Relief Valves
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Style: Internal

Internal pressure relief valves (IPR) are compressor safety devices that limit the maximum operating pressure of the compressor. Valves are designed in accordance with individual country code requirements, and are set to open at specific settings when the high side to low side differential pressure has been exceeded. When the valve opens, high side pressure is relieved to the low side and once equalized the IPR valve will reseat. When evaluating compressor problems, it is important to note that small amounts of system contaminants may become trapped in the relief valve seat area, potentially allowing some high to low side leakage within the compressor.

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Quality & Technical Information

  • Continuous operating temperature (COT): -40°F/300°F, -40°/149°C
  • Designed primarily for use on liquid receiver applications above the liquid refrigerant level (it is recommended that the factory be consulted before the valves are used on ther applications)
  • Satisfy ASHRAE Standard 15 code requirements for a refrigerant vessel safety device (Application information can also be found in ASHRAE Guide and Data Book)
  • Comply with ASME code for unfired pressure vessels
  • Discharge rates are certified by National Board of Boiler & Pressure Vessel Inspectors
  • Designed for maximum discharge capacities

Uses

  • Refrigeration
  • Air Conditioning
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Specifications & Technical Drawings

  • Internal Style – Dimensions – English / Metric

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  • Selection Process - English

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  • Certifications - English

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  • Internal Style – Dimensions – Chinese

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  • Selection Process - Chinese

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  • Certifications - Chinese

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  • Internal Style – Dimensions – Spanish

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  • Selection Process - Spanish

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  • Certifications - Spanish

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