281 Zero Leak PRI

The 281 Zero Leak PRI (Pressure Relief Insert) is the latest addition to Lee’s line of miniature pressure relief valves. This new valve is ideal for thermal relief and low flow hydraulic pressure relief applications where zero leakage is needed.

PDS 81 (2011-05) - 281 Zero Leak PRI-1

The cracking pressure is preset at the factory with capabilities ranging from 800 psid up to 4700 psid. Typical flow rates range from a few mL's per minute for thermal relief applications, and up to 0.5 GPM for low flow pressure relief applications. Each Zero Leak PRI is 100% tested and inspected to ensure reliable, consistent performance.

Please contact your Engineer for assistance in solving your zero leak relief valve needs.

  • Cracking Pressure from 800 - 4700 psid
  • Zero Leakage in a One Minute Test; One Drop Per Hour Maximum
  • Weighs only 6 grams
  • Working Temperature from -65°F to +275°F
  • 100% Tested and Inspected
  • Endurance Tested to 100,000 Cycles Minimum

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    Precision Hydraulics

    Pressure Relief Valves