Rotork CMA range

Compact modulating control valve actuators

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Product features

Compact precision modulating electric actuator range → matches the valve movement and control duty
All-electric continuous modulation with internal lcd configuration → supports controlled and repeatable valve operation
Integrated status and diagnostic functions → help maintenance teams identify operating issues
Configurable control options → supports integration with different plant control architectures
Documented environmental protection → supports selection for demanding installation conditions
Manual or local operating provisions where configured → support commissioning and service work
Rotork service documentation and spare-parts support → helps maintain the installed asset base
Application-specific sizing → reduces the risk of under- or over-sizing the actuator
Current and installed-base Rotork platforms can be assessed → supports planned modernisation
AxFlow selection and service support → provides one contact for specification, quotation and lifecycle needs

Product description

Info

Configuration

The Rotork CMA Range provides for simple, safe and easy set-up via an internal electronic 6-segment LCD display and push button configuration.

Features

Linear, quarter-turn and rotary drive action

Optional Local Controls with LCD Display (linear, quarter-turn, rotary)

Local Controls with LCD Display Plus Supercapacitor Reserve Power Pack (RPP) (linear and quarter-turn only) units available

Permanently lubricated and maintenance free drive train

Capable of being mounted in any orientation

Accurate and repeatable position control

4 to 20 mA loop powered, feedback signal

Digital communication options including HART®, Foundation FieldbusTM, Profibus®, Pakscan, RIRO and Modbus® available

Field selectable adjustments for:

Deadband

Zero and span

Command signal type

Standard or reverse acting

Manual-auto operation

Output shaft position on loss of signal

All CMA units have the ability to adjust their speed 50-100% of operation

Shut off torque/thrust capability (60 -150% of rated) for required tight shut off at the valve in the CLOSE position

Wide standard ambient temperature range:

EP Product: -4 to +149 °F (-20 to 65 °C)

WT Product: -22 to +158 °F (-30 to 70 °C)

Optional low temperature trim

Manual override standard

Electronic thrust/torque limiting

Two standard adjustable position switches

24 VDC option

Pakscan, HART®, Profibus®, Modbus, DeviceNet and Foundation Fieldbus® available

Optional hard wired RIRO (Remote In Remote Out)

Rotork is independent of valve manufacturers allowing us to work with a wide variety of valve makers and manufacturers worldwide.

CMA Range Benefits

Available in linear, quarter-turn and multi-turn versions and a range of five compact sizes

Economical operation of numerous types of control valve, damper and pump stroke adjuster applications

Maintenance-free drive train

Accurate and repeatable positional control

Resolution is 0.20% on linear and quarter-turn applications and 2 degrees on the multi-turn configuration

Continuous modulating performance

What is Rotork CMA used for?

Rotork CMA is used for linear, part-turn and multi-turn control valves plus metering and dosing equipment. The exact application depends on valve type, required duty and selected configuration. AxFlow can help confirm whether the actuator fits the process requirement.

How should Rotork CMA be selected?

Selection should start with valve movement, required torque or thrust, duty cycle, power or air supply, control signals and installation environment. Hazardous-area and functional-safety requirements must also be checked where applicable. AxFlow can support sizing and configuration before quotation.

Which technical data should be checked for Rotork CMA?

Key checks include valve torque or thrust, operating angle or travel, operating frequency, supply, ambient conditions, enclosure requirement and control interface. CMA supports continuous S9/Class D modulation; CML and CMQ variants provide positioning accuracy up to 0.1%, with a standard ambient range of -30 to +70 °C. The final configuration should always be verified against the selected actuator size and Rotork documentation.

Can AxFlow support service and spare parts for Rotork CMA?

AxFlow can support identification of the installed unit, service planning and spare-parts requirements for Rotork actuators. Availability depends on the exact generation, size and configuration. Provide the actuator nameplate and application details when requesting support.

What should be considered when replacing an installed Rotork CMA actuator?

Replacement should be based on the installed actuator data and the valve requirement, not only the series name. Mechanical interfaces, output, supply, control architecture and certifications should be checked. AxFlow can help compare the installed Rotork CMA configuration with an appropriate replacement.

UAB AxFlow

Phone: +370 (37) 291271

info@axflow.lt

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