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Pressure relief valve
max. 5 000 psi THE LEE COMPANY

Lee’s PRI (Pressure Relief Insert) Valves are high capacity miniature inserts available in cracking pressures from 20-5400 psid. Lee Relief Valves come in a wide range of styles. Each style has been developed to satisfy specific relief needs commonly found in hydraulic systems. Styles include:

* Screened and unscreened for design flexibility
* Zero Leak
* High Pressure
* “Momentum Free” styles that compensate for momentum forces
* NACE Compliant styles for harsh duty applications

The 187 PRI is the smallest relief valve, only three sixteenths of an inch in diameter and a little over a half inch long, covering cracking pressures from 20 to 100 psid.

Lee's TRI (Thermal Relief Insert) Valves are designed to relieve fluid pressure caused by thermal expansion. The inserts are optimized for relieving small flows, and are available for 3000, 4000 and 5000 psi systems. High pressure TRI Valves are available for thermal relief applications where the thermal relief valve will experience severe pressure spikes or pressure change rates in excess of 25,000 psi per second.