Product Range
Actuators
Gas Over Oil Actuators
Electro Hydraulic Actuator

Electro Hydraulic Actuator

Rotex EHF Series Actuators are self contained; electro-hydraulic actuators are particularly well suited for applications requiring critical control and high reliability.

The EHF series has a wide range of applications and is resistant to environmental influence, even in marine environments. The electro- hydraulic actuators are recommended within district heating plants, oil and gas depots where Explosion-proof equipment is required and where pressurized air is not available or unsuitable. Within the oil and power industry, safety is of the highest importance. In emergency situations the failsafe function i.e. close or open the valve automatically with the aid of a return spring in the actuator.

Advantages:

Reduced installation and maintenance costs
Most reliable means of positioning a valve in a safe position on loss of power or signal
The actuator is constructed for direct mounting on valves according to ISO-standards.
Designed for safety critical applications
Confirms valve availability and minimises plant shutdown
Improved process control and product quality
Provides local operator information
Complete sealing allows calibration and interrogation of the actuator in all environments
Environmental protection maintained for internal components during installation and commissioning
Interfaces with a variety of communication networks
Suitable for harsh environments including immersion up to 7m

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EHF Series
ProductDescriptionDownload
Compact design
IN BUILT Linear cylinder 2”to 6” bore
Stroke up to 8”
Megneto resistive feedback
ON OFF or regulating application
Fail safe open to fail safe close or vice versa can be done at site
Speed regulator built in

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EHF Series
ProductDescriptionDownload
Input signal 4 to 20 mA
Output signal 4 to 20 mA
Discrete control design
Cylinder bore up to 20”
Stroke up to 2 m
Megneto resistive feedback
ON OFF or regulating application
Fail safe open to fail safe close or vice versa can be done at site
Speed regulator built in

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EHF Series
ProductDescriptionDownload
Hydraulic system with rotary quarter turn actuator
63 Nm to 600000 Nm torque
Heavy Duty, High-performance, Internal tie rods, Female shaft drive
Local /remote operation
Discrete control design
Pump pressure switch
Hand pump for power fail manual operation

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EHF Series
ProductDescriptionDownload
Redundant Pump system
Built in oil filtration system
Twin controls for two linear cylinders installed on Cocker valves
High speed operation 3 m/s
Diagnosis controls built in
Pressure transmitter, Level transmitter, servo system, health of pump and motors, health of cylinder leakages monitored and transmitted via modBUS

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