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2. General Information
2.3 General Actuator Description
Building on Rotork’s historical success with innovative
technology, the CMA offers a highly accurate and responsive
method of automating control valves and pumps without the
complexity and cost of a pneumatic supply.
With a minimum resolution of 0.2% of full stroke for linear
& quarter-turn units and 2° of full stroke for multi-turn, the
Rotork CMA range helps to maximize product quality and
plant capacity.
CMA range actuators are self contained, purpose designed
and built for continuous remote electrical operation of
control valves.
CMA range of actuators delivers a series of sizes suitable
for almost all linear, quarter-turn and rotary control valve
and pump applications requiring exact position control and
continuous modulation.
Refer to Section 3 – Approvals for further detail concerning
approved actuators.
2.3.1 CML - Linear
The CML is a high precision linear actuator. It is capable
of producing between 100 to 750 pounds of force and a
maximum of 2 inch stroke length at a speed of between
0.125 to 0.25 inches per second.
NOTE: Thrust and Speed are dependant on frame size.
See PUB094-001 for full details.
2.3.2 CMQ - Quarter-Turn Actuators
The CMQ is a high precision quarter-turn actuator capable
of producing between 250 to 1000 lbf.in at speeds between
5to 22 seconds for a 90° operation.
NOTE: Torque and operating times are dependant on
frame size.
See PUB094-001 for full details.
2.3.3 CMR - Rotary
The CMR is a high precision rotary unit with torque outputs
between 50 to 250 inch pounds at output speeds between
5 to 24 RPM depending on frame size.
NOTE: Torque and operating times are dependant on
frame size.
The actuator comprises:
•
Absolute encoder
•
LCD user interface
•
DC brushless electric motor
•
Simple, maintenance free geartrain
•
Motor controller with travel and
torque/thrust adjustment
•
Manual overide
•
Hazardous area certification meeting
international and national requirements
•
Options
•
Local controls & external display
•
Reserve Power Pack (RPP)
•
Bus system option PCB
•
Remote Input Relay Output
RIRO option PCB card
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