December 2020
Installation, Operation and Maintenance Manual
MAN 606 Rev. 5
Operation and Use
14
Section 3: Operation and Use
Section 3: Operation and Use
3.1
Operation Description
In the normal operating situation, the double-acting actuator is fed by pressurised oil
which flows into the relevant cylinder chamber (for example opening). The cylinder
piston stroke causes the actuator operation and the consequent valve movement to the
operational position requested (in this case to the “open” position).
Upon a demand, the closing chamber the cylinder is fed by pressurised oil and at the
same time the oil is discharged from the open chamber into the return line: the actuator
performs the closing operation driven by the piston movement, and the valve moves from
the open position to the close (safety-related) position.
For local or remote operations, please refer to Sections 3.3.1, 3.3.2, and 3.3.3 and prior to
technical documentation furnished with actuators.
Typical schematics for various applications are follow attached for information only.
The power and control systems are supplied on specific customer demand.
!
WARNING
For all the relevant information please refer to the specific technical documentation
supplied with actuators.
