Additional Fittings; Strainer; Shut-Off Valve; Thermometer - Samson 43-1 Mounting And Operating Instructions

Mounting and start-up

6.3 Additional fittings

Î See Fig. 6
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 T 1010).
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.
Note
Check the strainer at regular intervals and
clean it, if necessary.
28
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.
6.3.4

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.
EB 2171 EN