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Mounting and start-up
5 Mounting and start-up
5.1 Mounting position
Standard mounting position
Î Install the regulator in a horizontal pipe-
line with the diaphragm actuator (6) fac-
ing downward (see Fig. 2).
Installation conditions
− Make sure that the regulator remains
freely accessible after the plant has been
completed.
− The electric actuator must be mounted
above the valve body.
− Install a strainer upstream of the regula-
tor (see section 5.2).
− Make sure the direction of flow matches
the direction indicated by the arrow on
the body.
− Install the regulator free of stress.
− On insulating the valve, do not insulate
the actuator and the coupling nut as well.
If necessary, an intermediate insulating
piece (order no. 1690-6975) must be
used. The insulating limit is in this case
approx. 25 mm above the top of the
valve body.
NOTICE
!
Possible malfunction and damage due to ad-
verse weather conditions (temperature, hu-
midity).
− Do not install the device outdoors or in
rooms prone to frost.
16
− Protect the regulator against frost if it is
used to control freezing media.
− Either heat the regulator or remove it from
the plant and completely drain the residual
medium.
5.2 Additional fittings
Strainer
A strainer installed upstream in the flow pipe
holds back any dirt or other foreign particles
carried along by the medium. For example,
the SAMSON Type 1 NI Strainer is suitable
(u T 1010).
− Install the strainer upstream of the regu-
lator.
− Make sure the direction of flow matches
the direction indicated by the arrow on
the body.
− Install the strainer with the filter element
facing downward.
− Allow sufficient space to remove the filter.
Shut-off valve
Install a hand-operated shut-off valve both
upstream of the strainer and at the outlet of
the return flow pipe (see Fig. 4). This allows
the plant to be shut down for cleaning and
maintenance, and when the plant is not used
for longer periods of time.
Pressure gauge
Install a pressure gauge at a suitable point to
monitor the pressures prevailing in the plant
(see Fig. 4).
EB 3136 EN
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