2.4 Assembling the Actuator Onto the Valve
To assemble the actuator onto the valve proceed as follows:
1. Check that the coupling dimensions of the valve ange and stem, or of
the relevant extension, meet the actuator coupling dimensions (valve stem
and ange). Lubricate the valve stem with grease in order to make the
assembly easier.
2. Connect a sling to the support point of the actuator and lift it. To make easier
the assembly, the valve stem has to be in perfect vertical position.
NOTICE
The eyebolt is sized for the lifting of the only actuator (NOT ACTUATOR+VALVE).
Proper lifting points have to be foreseen for the valve.
3. Screw the actuator coupling joint onto the valve by rotating the actuator,
or screw down the valve stem stroke-ring with Red Loctite® 542 and x
the half-bearings when the threaded holes of the actuator ange are in
correspondence with the holes on the valve ange, screw the proper stud
bolts. Screw the nuts on the stud bolts and tighten up the valve ange is in
contact with the actuator ange.
4. Tighten the nuts of the connecting stud bolts evenly with the torque
prescribed in the table. The stud bolts must be made of ASTM A320 L7 steel,
the nuts must be made of ASTM A194 grade 2 steel as minimum.
2.3 Storage
The actuators leave the factory in excellent working conditions and with an
excellent nish (these conditions are guaranteed by an individual inspection
certicate); in order to maintain these characteristics until the actuator is installed
on the plant, it is necessary to observe a few rules and take appropriate measures
during the storage period.
1. Make sure that plugs are tted in the oil connections and in the cable entries.
The plastic plugs which close the inlets do not have a weatherproof function,
but are only a means of protection against the entry of foreign matter during
transport. If long-term storage is necessary and especially if the storage is
outdoor, the plastic protection plugs must be replaced by metal plugs, which
guarantee a complete weatherproof protection.
2. If the actuators are supplied separately from the valves, they must be placed
in a wooden pallet to protect the coupling ange to the valve. In case of
long-term storage, the coupling parts (ange, drive sleeve, insert bush) must
be coated with protective oil or grease. If possible, blank o the ange with a
protection disk.
3. In case of long-term storage, it is advisable to keep the actuators in a dry
place or to provide at least some means of weather protection. If possible,
it is also advisable to periodically operate the actuator with ltered,
dehydrated and lubricated air; after such operations, all the threaded
connections of the actuator and the valves of the control panel (if existing)
should be carefully plugged.
September 2023
Installation, Operation and Maintenance Manual
MAN 627 Rev. 0
4
Section 2: Installation
Installation
