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5.2 Additional fittings
Strainer
NOTICE
!
Do not install a strainer upstream of the
Type 44-4 Safety Excess Pressure Valve.
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 when
installing the strainer:
− Install the strainer upstream of the
Type 44-7 Regulator.
− Allow sufficient space to remove the filter.
− Observe the flow direction.
− In horizontal pipelines with gases or liq-
uids, the filter element faces downward.
The filter element faces sideways in ap-
plications with steam.
− 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.
EB 2723 EN
Shut-off valve
Install a hand-operated shut-off valve both
upstream of the strainer and downstream of
the regulator (see Fig. 5). 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 both upstream and
downstream of the regulator to monitor the
pressures prevailing in the plant (see Fig. 5).
Mounting
21
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