Designed for quarter-turn, rotary or linear operation, robust Rotork CMA actuators perform numerous process control valve, metering pump and damper applications demanding precise position control and continuous modulation. Single-phase or DC electrical power is all that is required for simplified installation and control valve actuation. Explosion proof certification to international standards is available for hazardous area applications.
Local controls offer manual operation at the valve, combined with a vivid LCD display of valve position, which also incorporates critical and non-critical fault symbols. Control selection knobs enable selection of Local, Stop or Remote operation and Open or Close input commands in the Local control mode. Each mode can be locked in place to prevent unauthorised operation. The LCD display shows the valve position as a precise percentage of total valve travel.
For fail-to-position performance, a reserve power pack provides the actuator with the ability to perform a predetermined action on power failure. The power pack also preserves position indication on the LCD display during power failure. Upon restoration of mains power, the power pack is swiftly recharged to ensure continued fail-to-position functionality. Action on power loss is easily configured with the standard CMA HMI interface as part of the user-friendly actuator set-up menu, utilising a 6-segment LCD display and push button configuration. Successful CMA applications include choke valves on shale gas installations, stroke adjusters on metering pumps, precision metering on chemical dosing and the operation of dampers.