Electro-hydraulic Emergency Shut-off Valve Automation

These valves can be found mostly in the oil and gas industry, installed in pipelines, production wellheads or tank farms. Typically, they are in very remote locations where sources of energy are limited or not available. These valves are critical to process safety and need a reliable self-powered automatic shutdown system.

The E2H-ESD actuator is a reliable and energy efficient equipment that combines the precision and large force capacities of hydraulic systems with the convenience and availability of electric power. Designed to operate any type of rotary valves in hazardous areas under extreme conditions, this actuator has been tested and certified to meet requirements under the CSA Group for its electrical components and in conformance with requirements under IEC 61508 standard to meet its safety integrity level.

In the E2H-ESD actuators, all hydraulic components and sensors are integrated into a compact manifold block. This results in space saving, ease of installation and elimination of leaks and break points by removing all hoses which leads to reduction in down time required for service.

Units come standard with components certified to Explosion proof under hazardous area classifications, even when all components within this module are rated to hazardous areas the module is fully enclosed and pad-lockable for additional protection to environmental conditions and safety to operators

The E2H-ESD uses a hydraulic cylinder from Cowan’s own series of heavy – duty 3000 psi rated linear actuator, ML.

To ensure a safe and reliable failure condition regardless of the operation status, the power-fail-safe model of the E2H-ESD is completed with a spring that is fully sealed in a compact canister, all Welding is Certified to CSA 47.1 Division 2.

The electrical control panel comes standard mounted directly on the unit providing a self- contained compact design ready to be used. When required, the panel can be mounted remotely in the areas where the unit cannot be accessed easily due to installation, environmental conditions, etc. Moreover, to provide cost savings and ease of status monitoring for operators in case of multiple actuators, a central control panel can be mounted remotely to control multiple units.

Designed to be energy efficient, In the E2H-ESD Series actuators the motor stops when there is no movement required from the valve, this leads to very low power consumption and increased life of moving components.

Understanding that emergency shut off valves are critical parts of safety systems and therefore a reliable actuator is a must, the design of the E2H-ESD is a non-complex (Type A) component based on the definition of IEC 61508 (device with well-defined failure modes, well known failure rates, and behavior under fault conditions that can be completely determined), for which has a Safety Integrity Level of 3. Components which are in effect in the fail-safe function are all SIL certified.