ARI Armaturen STEVI AS 350 DN15-50 EN - Manual (Page 8)

Page 2-8 Rev. 0040322000 3413
Operating and installation instructions
Y-pattern processing valve - STEVI
®
AS 350
5.2 Requirements at the place of installation
The place of installation should be easily accessible and provide ample space for
maintenance and removing the actuator. The valve should preferably installed vertically
with the actuator at the top.
To protect the actuators from excessive heat, the pipes have to be insulated.
5.3 Installation instructions concerning actuators
Normally, stop valves are supplied complete with actuator fitted.
It is not permitted to mantle / dismantle actuators with valves operating and service
conditions (temperature and pressure). At retrofitting or maintenance, the mounting of the
bonnet has to be done acc. to item „7.1 Replacement of bonnet“.
During assembly work, the plug is not be turned on its seating at air supply pressure.
5.4 Installing valves with butt weld ends
Please note that only qualified persons using appropriate equipment and working in
accordance with technical rules are allowed to install fittings by welding.
The responsibility for this lies with the system owner.
Refer to the data sheet for information about the shape of the butt weld ends.
Fig. 10: Pipeline vertically Fig. 11: Pipeline horizontally
ATTENTION !
Before welding, the bonnet has to be dismantled in order to avoid damage
to the plug sealing.