Cowan Dynamics continues to advance valve automation with the release of the E2H-ESD. The E2H-ESD actuator is the newest addition to their electro-hydraulic actuator lineup and is designed specifically for Emergency Shutoff Valve (ESD) automation. The ESD-E2H combines the best of hydraulic, and electric actuation in one self-contained system. The E2H-ESD features a completely modular design consisting of the following modules: hydraulic power, hydraulic cylinder, scotch yoke mechanism, spring canister, and control panel for local and remote operation.
In the E2H-ESD actuators, the motor stops when there is no movement required from the valve, this leads to very low power consumption, increased life of moving components, and eliminates any downtime often needed in units where the operation is done using pressurized oil in an accumulator system. In these systems, if it is true that the capacity and energy consumption its lower, the system must recharge the accumulators after a few operations have been completed at which time the unit is inoperative, this could affect the reliability of the actuator to achieve an emergency action.
Emergency shutdown signals can be designed to perform the desired action per application specifications and move the valve to the desired position (fully open/close, last-locked) within the specified time.
Its modular design is unique in the market and not only provides multiple benefits for standardization, service, and maintenance but also allows the user to completely remove the hydraulic power and the electrical controls from the actuator mechanism in cases of high vibration or when there are issues with accessibility.