ARI Armaturen PREDU 700 EN - Manual (Page 11)

Rev. 0040701000 1714 Page 2-11
Operating and installation instructions
PREDU
®
5.4 Control line, flow restrictor, water seal pot
The control line should at least have a diameter of 10 mm and can be fixed with the help of
the supplied 90
-screw. The downstream connection for the control line should be 10 x DN,
at least 1 m behind the pressure reducing valve, preferably on top or on the side of the pipe.
With following distributor, the connection should be direct on the distributor.
Fig. 5
-
ATTENTION !
Install water seal pot for temperature in excess of 100 °C
Fill the water seal pot with water before starting up, e.g. with water vapour.
Fill through the filler neck using the funnel attached.
The water seal pot is mounted near the control line connection. The arrow on the
shield must show downwards. You can fill the pot with the help of the supplied
funnel (max. limit values PS 20 bar, TS -10°C to 350°C for downstream
pressure).
Only when the pressure reducing valve shows unstable working, the supplied
flow restrictor must be built in between actuator and control line.
Adjusting plate
Actuator
Control line
Water seal pot
Plug
90°-screw
(e.g. Ermeto WE 10-LLR)
R 1/4
Flow restrictor ( only by unstable working !)
G 1/4 / G 1/4
Fill hole
Connection R 3/8
Weld screw
(e.g. Ermeto AS 10-PL)
Funnel
Ventilation
plug
to bleed water seal