Expro unveils new power relief valve system

Expro has unveiled the PRV MAX mud pump pressure relief valve system, an automated relief valve with an integrated hydraulic actuator, separate hydraulic power unit that can be mounted directly to the valve or within 20 ft (6 m) of the valve, and a remotely mounted touchscreen control panel.

Offshore staff

LONDON -- Expro has unveiled the PRV MAX mud pump pressure relief valve system, an automated relief valve with an integrated hydraulic actuator, separate hydraulic power unit that can be mounted directly to the valve or within 20 ft (6 m) of the valve, and a remotely mounted touchscreen control panel.

The PRV MAX is constructed using non-interacting mechanical components, which means that a single point of failure will not spread to other valves. During tests, the PRV MAX fully opened in under 375 milliseconds after mud pressure exceeded the set point.

Tungsten carbide sealing components provide high erosion resistance and extended trim life, without the use of elastomeric components. This extends service life between maintenance periods, which was validated by DNV witness-testing to 250 pressure relief cycles. Seal integrity was maintained throughout.

The pressure retaining components of the PRV MAX are forged construction from API 75 K materials. The system is ATEX certified for hazardous areas.

01/24/2011

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