7
Installation, Operation and Maintenance Manual
MAN 571_EAC Rev. 1
September 2020
Installation
Section 2: Installation
Figure 6
GPO suitable for mounting on valve with horizontal stem.
2.2.1
Instruction for Transport with Gas-Hydraulic Tanks
in Horizontal Position
NOTICE
The GPO actuators have to be maintained always with the gas-hydraulic tanks in vertical
position, in order to avoid that the hydraulic oil flows out through the pneumatic pipes and
the control group.
The presence of oil in the pneumatic control group can be dangerous for the possibility
of fouling by presence of dust or sand.
This could compromise the correct operation of control valves.
Additionally the loss of part of the hydraulic oil from the gas-hydraulic tank compromises
the correct functioning of GPO actuator.
If the actuator, for reason of transport dimensions, must be boxed in horizontal position
it is mandatory to isolate the oil inside of the gas-hydraulic tanks to avoid losses.
The pneumatic pipes must be removed and their-ends must to be protected by plastic
plugs, to avoid ingress of dirtiness.
They have also to be fixed by proper adhesive tape, to avoid damages during the transport.
!
WARNING
For the transport of actuator with gas-hydraulic tanks with horizontal axis, the packing
has to foresee a proper support for the tanks.
If the necessity of horizontal transport is known at the order date, Biffi Italia s.r.l. can
provide two ball type isolation valves at the inlet of the bottles. In this case it’s very easy to
isolate the oil bottles, simply closing the stop valves before the boxing.
The correct procedure for the transport of GPO actuator with gas-hydraulic tanks in
horizontal position is the following (see Figure 7).
