Installation, Operation and Maintenance Manual
MAN 608 Rev. 5
December 2020
Operation and Use
17
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.
Figure 13
OLGAS with hydraulic manual handpump
3.3
Operations
(refer to specific document: operating diagram furnished).
3.3.1
Emergency Manual Operation
The OLGAS actuators can have an emergency manual override in addition to the local
and/or remote control panel which controls the oil supplied by a power pack for the
“normal” actuator operation.
The emergency manual override mounted on the actuator, consists of an hydraulic manual
override and a hydraulic manual selector to choose the actuator “Normal operation”,
with oil supply from a power pack, or the “Emergency manual operation”. The compact
hydraulic manual override consists of:
•
handpump to deliver oil from the tank to the actuator cylinder to control the
actuator operation against the spring
•
stop valve which allows the connection of the actuator cylinder to the oil tank to
control the actuator operation by spring
•
relief valve to prevent the oil pressure delivered by the hand pump from exceeding
the maximum allowable value
•
oil tank
On request the emergency manual override can be included in the power pack.
