Hydraulic
Hydraulic actuators use oil under high pressure as energy power source.
Main features of hydraulic actuators are:
- Compact and small design
- Smooth operation over complete valve stroke
- Spring return actuators for fail-safe operation
- Possibility for submerged or sub-sea operation
Hydraulic actuators can be equipped with many ancillaries such as:
- Limit switches (direct mounted to actuator or in a switchbox)
- Solenoid valves
- Throttle block
- Potentiometer
- Pilot operated check valves
- Lever or hand pump unit
Function:
- Remote open/close position monitoring of the valve (mechanical switches or inductive proximity sensors)
- Remote on/off operation of actuator
- Speed control for increased operating times
- Continuous valve disc position feedback (resistance signal)
- Maintain valve disc position after hydraulic supply failure
- Manual override of operation after hydraulic supply failure
Specific technical information on request.
