ARI Armaturen STOBU PN63-160 EN - Manual (Page 11)

Operating and installation instructions
STOBU
®
PN63-160
Rev. 0040102002 0213 Page 2-11
5.6 Requirements at the place of installation
The place of installation should be easily accessible and provide ample space for
maintenance and removing the actuator. Stop valves should be installed before and after
the control valve to enable maintenance working without draining the piping system. The
valve should preferably installed vertically with the actuator at the top. Inclined or horizontal
installation without supports is permissible only with light actuators.
For this installation position, the two distance columns (or joke) have to be above each
other in the vertical plane
:
Permissible actuator weights for valves with unsupported horizontal stem is 25 kg.
The pipes must be lagged to protect the actuators from excessive heat. Sufficient space
must be left for the maintenance of the stem packing.
5.7 Installation instructions concerning actuators
Normally, control valves are supplied complete with actuator fitted.
It is not permitted to mantle / dismantle actuators with valves operating and service
conditions (temperature and pressure). The actuators must be assemble as describe in the
operating instructions during conversion and maintenance.
During assembly work, the plug is not be turned on its seating at closing pressure.
When connecting the electrical actuators, you must comply with the specifications of the
Low Voltage Directive. Connection (grounding) of electrical actuators must only be carried
out by qualified personnel.
fig. 12: Pipeline vertically fig. 13: Pipeline horizontally