13WIKA operating instructions flow switch, model FSD-3
EN
14153887.01 09/2016 EN/DE/FR
5.1.3 Probe alignment
During mechanical assembly of the FSD-3, make sure
that the installation mark points in the opposite direction
of the ow direction of the medium.
5.1.4 Sealing
For sealing the process connections with parallel
threads, use at gaskets, lens-type sealing rings or WIKA
prole sealings at the sealing face. With a tapered thread
(e.g. NPT thread), sealing is made in the thread using
additional sealing materials, e.g. PTFE tape (EN 837-2).
For further information on seals see WIKA
data sheet AC 09.08 or at www.wika.com.
5.1.5 Disturbing interferences in the piping system
For correct measurement, the ow switch requires a fully
characterised ow prole. This is why calming sections
must be provided in the pipeline after a pump, a pipe
elbow, installed parts and changes in cross-section.
Installation
mark
L > 3 ... 5 x D
5. Commissioning, operation
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