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4 Installation
See Fig. 3.
Select the installation location making sure
that the regulator is installed at a distance of
at least six times the valve size (DN) away
from pipe fittings or instruments that cause
flow turbulence (e.g. pipe bends, manifolds,
pressure measuring points or other valves).
They can change the flow conditions which
may lead to an instable control process es-
pecially in applications with gases, air or
steam.
Contact SAMSON to obtain the
TV-SK 17041 documentation which contains
more details on installation requirements.
4.1 Notes on installation
Install the ready-assembled regulator in hori-
zontal pipelines.
− Flush and clean the pipeline thoroughly
before installing the regulator. Other-
wise, impurities in the pipeline may im-
pair the proper functioning of the valve,
above all the tight shut-off.
− The direction of flow must match the di-
rection indicated by the arrow on the
body.
− Install the regulator free of stress. If nec-
essary, support the pipeline near the
connecting flanges. Do not attach sup-
ports directly to the valve or actuator.
− Install a strainer upstream of the regula-
tor.
− Protect the regulator from icing up when
controlling media that can freeze. If nec-
EB 2552-1 EN
essary, depressurize and drain the regu-
lator and remove it from the pipeline
while the plant is shut down.
Note
The side on which the operating elements
(hook-up of the pilot valve) are located var-
ies depending on whether a valve balanced
by a bellows or a diaphragm is used.
Mounting orientation
Observe the flow direction.
Valve balanced by a bellows
− Bellows including
housing suspended downward.
Valve balanced by a diaphragm
− Balancing diaphragm (diaphragm sec-
tion) pointing upward
Insulation · To insulate cold systems, we
recommend first filling the plant and carefully
rinsing it (see section 5.1). The regulator
must not be insulated until the set point is
adjusted.
− Start up the plant and adjust the set
point. Shut down the plant again and let
it heat up until the condensation water
has dried off.
− Afterwards, insulate the regulator and
pipes conveying the process medium
using insulation material with a water
vapor barrier. If the pilot valve has a
spring, it must must be protected by a
sleeve to allow it to move. The spring-
loaded actuator stem must not touch the
insulation.
Installation
9
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