CMA Actuators Increase Scope of Electric Control-Valve Technology
Rotork has announced its new CMA series of all-electric modulating actuators sized for linear, quarter-turn and rotary control valve and pump applications requiring precise position control and continuous modulation. They have several applications throughout chemical processing plants.
CMA actuators are powered by single-phase or direct-current supplies, eliminating the need for air hoses and compressors used with similar pneumatic control-valve actuators. Set-up and configuration is can be completed via push-buttons and an internal six-segment LCD display.
Resolution is 0.25 percent on linear and quarter-turn applications and 2 degrees on the multi-turn configuration. Other features include a permanently lubricated and maintenance-free drive train, a 4-to-20 mA loop-powered, feedback signal and digital communication options including HART, Foundation Fieldbus Profibus, Pakscan, RIRO and Modbus.