Installation; Mounting Position; Strainer - Samson 45-6 Mounting And Operating Instructions

upstream pressure (high pressure) is routed
through the attached control line (11) to act
on the diaphragm in the high-pressure
chamber.
The differential pressure creates a force at
the operating diaphragm (6.1) which is
used to position the plug depending on the
force of the positioning springs (8). The
force of the spring assembly is modified by
turning the set point adjuster (10).
The principle of operation described above
also applies to regulators with a manual ad-
juster (0.1 to 1 bar, DN 15 to 32). The posi-
tioning springs, however, are located in an
enclosed housing. The set point is adjusted
at the manual adjuster (12) using the scale.
Note!
For external connection of the control lines
(special version) observe the following steps:
Connect the high-pressure line of the plant to
the high-pressure connection (+) of the actua-
tor (bottom diaphragm chamber)
Connect the low-pressure line of the plant to
the low-pressure connection (–) of the actua-
tor (top diaphragm chamber) as illustrated
in Fig. 1 (left).
2

Installation

2.1

Mounting position

The differential pressure regulators must be
installed in horizontal bypass or short-circuit
pipes with the actuator suspended down-
ward (see Fig. 2).
Regulators in sizes DN 15 to DN 25 can
also be installed in vertical pipelines. For
medium temperatures above 80 °C, the reg-
ulator must not be installed with the dia-
phragm actuator pointing upward. The me-
dium must flow through the valve in the di-
rection indicated by the arrow on the body.
2.2

Strainer

Since sealing parts, globules, and other im-
purities carried along by the medium may
impair the proper functioning of the valve
and especially the tight shut-off, a strainer
(e.g. SAMSON Type 1NI) must be installed
upstream of the differential pressure regula-
tor.
The strainer must be installed so that the me-
dium flows through it in the direction indi-
cated by the arrow on the strainer body.
The filter element must be suspended down-
ward. Ensure that there is sufficient space
available to remove the filter.
1
3
Installation in a bypass pipe
+
1
3
_
Installation in a short-circuit pipe
1 Strainer
2 Regulator
Fig. 2 · Installation examples
Installation
3
4 4
_
+
_
2
+
4 4
_
2
+
3
3 Shut-off valve
4 Pressure gauge
EB 3226 EN
5