Cowan Dynamics ZE-ESD Emergency Shutoff Valve

Zero-Emission Emergency Shutoff (ESD) for valves that require an automatic fail-safe position where power is not available and/or the user must eliminate fugitive emissions from the actuator.

This self-contained Emergency Shutdown (ESD) module can be used with rotary or linear valves and consists of a hydraulic manifold block, a leakage compensating accumulator, a small reservoir, and a hydraulic hand pump.

The ZE-ESD is compatible with linear and rotary valves such as gate valves, ball valves, or butterfly valves. In normal operation the system keeps the valve in its “normal” or “operational” position locked in place.

These systems are engineered by Cowan to be retrofitted onto existing pipelines without taking the valve out of service.

In the event of a failure, triggered by an ESD signal, the system will use stored hydraulic pressure to move the valve actuator to the desired fail-safe position (open or close) ensuring an automatic fail-safe system without the need for external power.

This system is designed to minimize maintenance and is engineered for tough heavy-duty industrial applications to operate valves with high thrusts and torques.

Emergency shutoff valves (ESD valve) are specifically designed to shutoff the process within the pipeline in the case of an undesirable event. The ZE-ESD easily works as a drop-in replacement for ESD valves without taking the valve out of operation. The ZE-ESD does not require any power source nor emits fugitive emissions during the operation the actuator.

Courtesy of Cowan Dynamics.
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