28
EB 2512 EN
Assembly
5.2.2
Pipeline routing
The inlet and outlet lengths vary depending
on the process medium and the flow condi
-
tions in the valve. To ensure the regulator
functions properly, follow the installation in-
structions given below:
Î
Observe the inlet and outlet lengths (see
Table 6). Contact SAMSON if the valve
conditions or states of the medium pro-
cess deviate.
Î
Install the regulator free of stress and
with the least amount of vibrations as
possible. If necessary, attach supports to
the valve.
Î
Install the regulator allowing sufficient
space to remove the actuator and valve
or to perform service and repair work on
them.
5.3 Control line, compensation
chamber and needle valve
5.3.1 Control line
The control line must be provided at the site
of installation, e.g. a
3
/
8
“ pipe for steam or
an 8x1 or 6x1 mm pipe for air/water.
Connect the control line to the downstream
line (p
2
) at least one meter away from the
valve outlet.
Weld the control line at the side in the mid-
dle of the pipe, inclining at a ratio of ap-
proximately 1:10 up to the compensation
chamber. If a manifold is located down-
stream of the pressure reducing valve, con-
nect the valve to the manifold, even if it is
several meters away (see Table 6 and
Fig. 7).
5.3.2 Control line kit
A control line kit for tapping pressure at the
valve body is available as an accessory part
from SAMSON.
5.3.3 Compensation chamber
Î
Refer to Table 9
A compensation chamber (18) is required
for liquids above 150 °C as well as for
steam. The mounting position of the compen-
sation 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 position must be adhered to;
otherwise the safe functioning of the regula-
tor cannot be guaranteed.
Weld the line coming from the pressure tap-
ping point to the
3
/
8
“ pipe socket on the
chamber.
Install the compensation chamber at the
highest point of the pipeline. Consequently,
the control line between compensation
chamber and actuator must also be installed
with a downward slope. In this case, use a
3
/
8
“ pipe with screw fittings.
If the control line connection is located below
the middle of the valve inlet flange, arrange
