December 2020
Installation, Operation and Maintenance Manual
MAN 606 Rev. 5
Operation and Use
16
Section 3: Operation and Use
3.2
Residual Risks
!
WARNING
The actuator has parts under pressure.
Use the due caution.
Use individual protections provided for by the laws and provisions in force.
3.3
Operations
Refer to specific document: Operating Diagram Furnished.
3.3.1
Local Manual Operation
The OLGA actuators can only have the hydraulic manual override for local operation.
The compact hydraulic control unit mounted on the actuator consist of:
•
handpump
•
directional control valve to select “to open” or “to close” actuator operation
•
relief valve to prevent the oil pressure delivered by the handpump from exceeding
the maximum allowable value
•
oil tank
Accessory are available on request, for instance:
•
dual pilot operated check valve
•
bladder-type or piston-type accumulator delivered
Figure 12
