Cowan Dynamics

ESD Valve System

ZE-ESD Module

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.

Overview

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.

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.

ESD Valve Safety

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.