EB 3003 EN
11
Installation
5.5
Control line, compensation
chamber and needle valve
Control line
· A control line preferably as an
8 x 1 mm stainless steel pipe must be provid-
ed at the site of installation. Connect the con-
trol line to the main pipeline at least five
times ØD away from the valve. If a manifold
is located in between, increase the distance
correspondingly. How the lines are routed
generally depends on the installation site.
We recommend connecting the control line
at the side of the main pipeline. Install any
instruments that can cause turbulence in the
flow sufficiently far away from the pressure
tapping points.
Do
not
change the pipe diameter of the
main pipeline so that it is
off center
!
Control line kit
· A control line kit for tap-
ping pressure directly at the valve body is
available as an accessories part from
SAMSON (
u
T 3095). These control line kits
for tapping pressure directly at the valve
body already take into account the flow con-
ditions. As a result, no special attention has
to be paid to the flow conditions on connect-
ing the regulators.
Compensation chamber
· A compensation
chamber is required for liquids above
150 °C as well as for steam (valve balanced
by a bellows). The mounting position of the
compensation chamber is indicated by an
adhesive label on the chamber itself as well
as by an arrow and the word "top" stamped
on the top of the chamber. This mounting po-
sition must be adhered to; otherwise the safe
functioning of the pressure reducing valve
cannot be guaranteed.
Correct!
Fig. 5.4:
Connection at the side – optimal
Incorrect!
Fig. 5.3:
Connection at the top – incorrect po
-
sition
Incorrect!
Fig. 5.2:
Connection at the bottom – incorrect
position
(–)
Ø d
min.
3 x Ø d
min.
3 x Ø d
min.
5 x Ø D
Ø D
M
(+)
Fig. 5.1:
Control line connection, depending
on how the pipeline is routed
Fig. 5:
Control line connection