Additional Fittings - Samson 45-9 Mounting And Operating Instructions

Mounting and start-up

5.3 Additional fittings

Î Refer to Fig. 6
Strainer
A strainer (2) 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.
− The direction of flow must correspond to
the arrow on the valve body.
− The filter element must be installed to
hang downward.
− Install strainers in vertical pipelines with
the medium flowing upward with the
drain plug facing upward.
− Allow sufficient space to remove the filter.
22
Note
Check the strainer at regular intervals and
clean it, if necessary.
Shut-off valve
Install a hand-operated shut-off valve both
upstream of the strainer and at the outlet of
the return flow pipe. 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 gauges
Install a pressure gauge at a suitable point to
monitor the pressures prevailing in the plant.
Mounting parts
Welding ends, threaded ends or screw-on
flanges are required to install the regulator
in the pipeline (see section 7.6).
EB 3128 EN