Electric actuators generally use a worm drive because of its advantages of high drive ratio and self-locking.
Depending on the markets and types of facilities, the features of emergency manual control, key functions of the actuator, can be very different.
The IEC 60034 standard defines the electric motors' standard duty cycles. According to this standard, S2 duty rating is short time duty: motors using this duty cycle adapt to constant load.
Bernard Controls INTELLI+® is an integrated control solution which includes a control logic as well as power contactors.
Thanks to absolute sensors, which constantly measure the position & torque of your valve, you can get precise and reliable information.
In the process, some control valves need to be equipped with Emergency Shutdown Device (ESD) in order to protect the pipeline and equipment from damage.
The fieldbus present on a large number of installations is used more and more to communicate information and commands with multiple actuators and contactors connected in series on a single pair of wires.