Extended actuator range offers improved control valve automation
Rotork has extended its CMA range of compact modulating actuators with new sizes specifically designed for reliable automation of larger linear control valves.
The new actuator is capable of a maximum 20 kN seating thrust. The new sizes increase the CMA range modulating thrust performance to 13 kN with a 114.3 mm stroke length for the automation of larger valves with higher pressure ratings.
The actuator range offers a low power consumption solution for automation in established or remote installations such as oil installations and offshore facilities where there are pneumatic limitations. The design allows for solar powered and battery back-up supplies in remote locations where electric energy consumption is a concern and power is often provided through solar collection for the operation of remote automated critical systems such as wellheads.
CMAs are said to be robust enough to handle extreme temperature swings and corrosive environments. They are also available for explosion proof areas. The CML-1500 and CML-3000 models, including those with hazardous area approvals, are watertight to IP68 for temporary submersion (7 metres, 72 hours).>
Source: Control Engineering Europe - All Articles