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28
EB 2171 EN
Mounting and start-up
6.3.4 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 control thermostat
and valve or to perform service and re-
pair work on them.
6.3.2 Shut-off valve
Install a hand-operated shut-off valve (1, 6)
both upstream of the strainer and down-
stream of the regulator. This allows the plant
to be shut down for cleaning and mainte-
nance, and when the plant is not used for
longer periods of time.
6.3.3 Thermometer
Install a thermometer (4) both upstream and
downstream of the regulator to monitor the
temperatures prevailing in the plant.
6.3
Additional fittings
Î
6.3.1 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
The following points must be observed
during installation of the strainer:
–
Do not use the strainer to permanently
filter the process medium.
–
Install the strainer upstream of the regu-
lator.
–
Select a strainer (mesh size) suitable for
the process medium.
–
Allow sufficient space to remove the filter.
–
Observe the flow direction.
–
In horizontal pipelines with gases or liq-
uids, the filter element faces downward.
–
Install strainers in vertical pipelines with
the medium flowing upward with the
drain plug facing upward.
Check the strainer at regular intervals and
clean it, if necessary.
Note