December 2020
Installation, Operation and Maintenance Manual
MAN 606 Rev. 5
Installation
10
Section 2: Installation
The Biffi insert bush with 2 external keys at 45° allows to position the keyway for the valve
every 90°. Consequently actuator can be mounted in 4 positions at 90° on top of the valve.
For biggest actuator models, the bore of the yoke can be machined according to the
dimensions of valve stem.
2.4.2
Assembly Procedure
NOTICE
Failure to comply with the following procedures may impair product warranty.
!
WARNING
Installation, commissioning and maintenance and repair works should be carried out by
qualified staff. A non-conforming assembly could be the source of serious accidents.
For actuator assembly on the valve:
NOTICE
Check that the assembly position, as shown on the documentation, complies with system’s
geometry. Check the consistency of the parts of actuator-valve coupling.
•
Operate the actuator so that it reaches the position matching valve position
(Section 3.3).
•
Lubricate valve stem with oil or grease.
•
Properly clean and remove grease from coupling flange surfaces.
•
Connect, if supplied separately, the adjustment insert to valve stem and fasten it
with the special fastening pins.
•
Lift the actuator using the special lifting points (Section 2.2).
•
Install the actuator so that valve stem inserts in the coupling area. This coupling
should be made without forcing.
•
Fasten the two parts with the threaded connections (screws, tie rods, nuts). If
holes of coupling flanges are not aligned, adequately operate the actuator if
necessary move the mechanical stops backwards (Section 3.4).
•
Fasten threaded connections. Please refer to Table 2.
Table 1.
Position 2
Position 3
Position 4
Rotate insert-bush 180° around
vertical-standard position (1)
Rotate insert-bush 180° around
axis A-A, from position 2
Rotate insert-bush 180° around
axis A-A from position 1
Insert bush turned upside down
