Rotork manPower fail-safe actuator control system

The Rotork manPower range of fail-safe actuator control systems for quarter-turn and linear valves and dampers provides high-integrity fail-safe valve operation without the need for any external power supply. The self-contained system is suitable for workshop or field mounting on a wide range of rotary- and linear-operated valves and dampers. It offers a cost-effective solution for actuator applications where operation is infrequent. Typical applications include: emergency shutdown valves and over- or under-pressure protection at remote, unpowered locations.

Each module contains a compact, manually operated hydraulic power unit that provides hydraulic pressure to operate a spring-return actuator. The fail-safe system can be controlled by electrical control signal(s), pressure pilots or fire sensors. When tripped, the actuator spring cartridge drives the valve to its fail-safe position. The safe and easy-to-operate system is manually recharged via the hand pump. There are four power module variants. Rotork installs the appropriate model on an actuator sized to meet the end user’s valve torque demand. Modular construction from its standard components facilitates quick delivery and simplifies installation, operation and maintenance. Configurations are available for virtually any size or type of valve.

The unit is easy to mount on either new or existing valve actuators or dampers. The closed-loop, non-breathing hydraulic circuit is temperature compensated for use in the most extreme environments. It is also compatible with FDA-approved, food-grade hydraulic fluids. Installation costs are reduced because the need for plant air, fuel gas, electricity or nitrogen backup systems is eliminated.