In the latest development of its successful range of CMA electric control valve actuators, Rotork has introduced a new version specifically designed for the demands of choke valve operation.
Built with extensive industry experience, the CMR-250/GB3 actuator meets exacting requirements for low power, high torque modulating control in a compact package for applications including severe service upstream wellhead production and injection valves. The low power requirement and a 24VDC option enables solar powered and battery back-up supplies to be introduced in remote locations, whilst the all-electric technology delivers considerable system simplification and economy in any environment by eliminating the on-going costs associated with an instrument air supply.
Easily adaptable to suit any type of valve, the CMR-250/GB3 delivers a maximum output torque of 45 Nm (400lbf in). Available for a range of single-phase or DC power supplies, the design combines a brushless motor with permanently lubricated, high efficiency gears to achieve accurate, responsive and continuous modulating control. Rotary output speed is adjustable down to 50% of full speed.
The compact actuator enclosure is environmentally sealed to IP67 as standard and available with ATEX, IECEX, FM and GOST hazardous area certification. The wide ambient operating temperature range (-20 to +65ºC for explosion proof models and -30 to +70ºC for watertight models) facilitates long-term reliability and maintenance-free operation in the harshest of environments.
Actuator set-up is performed in a logical menu-driven process using an internal electronic 6-segment LCD display and pushbuttons. User selectable adjustments encompass speed, dead band, zero and span, command signal type, standard or reverse action and loss of signal position. A standard 4-20mA signal is used for control and feedback, whilst digital network options include Rotork Pakscan, HART®, Profibus®, Modbus® and Foundation Fieldbus®. A hard-wired RIRO (Remote-In-Remote-Out) option is also available. As with all Rotork products, the CMR-250/GB3 actuator is backed by the worldwide sales and service network of the Rotork flow control group, providing a local source for complete support in every territory using fully trained engineers.
