Miniature PRI pressure relief insert ensures zero leakage

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Miniature PRI pressure relief insert ensures zero leakageA new miniature valve designed for protecting low-pressure systems that need an over pressure safety relief valve that guarantees zero leakage, is a new addition to Lee Products’ range of field-proven miniature pressure relief valves. The 187 Zero Leak PRI (Pressure Relief Insert) is for systems with pressures ranging from 20 up to 100psid and is suitable for both pneumatic and hydraulic pressure relief applications.

The benefit of zero leakage when the valve is closed is particularly important for applications such as ‘closed’ avionics cooling systems, where a safety relief valve is needed should the coolant temperature spike causing excess internal pressure.

The 187 valve is an example of Lee Products reputation for ‘innovation in miniature’, helping machine builders to meet the objectives of designing smaller, more compact systems, without compromising performance. The 187 valve weighs just 1.5grams and measures 4.75mm in diameter and 15.74mm in length.

An elastomeric valve seat ensures zero leakage and this is available in materials which are compatible with most fluids. Cracking pressure is preset at the factory enabling capabilities ranging from 20psid up to 100psid and each valve is endurance tested to ensure a long-life performance of a minimum of 100,000 cycles.

Further details for the 187 Zero Leak PRI are available from

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