Connecting The Piping - KSB WKLn Installation & Operating Manual

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3.5 Connecting the Piping

Suction lift lines should be run with a rising slope towards the pump, positive
suction lines with a downward slope towards the pump.
The pump must not bear the weight of the piping.
The nominal bores of the pipes should be the same as or larger than those of the
pump nozzles. We recommend installing non-return devices and shut-off valves,
depending on the type of installation.
Before commissioning a new installation, thoroughly clean, flush and blow
through all vessels, piping and connections. As welding beads, scale and other
impurities frequently only become dislodged after a certain period of time, it is
necessary to fit a strainer should be three times the cross-section of the piping in
order to avoid excessive pressure loss across the strainer due to clogging.
The conical strainer consists of a coarse strainer fronted by a fine strainer with a
2,0mm mesh and 0,5mm wire, made of corrosion-resistant material. See DIN 4181
1. Strainer holder
2. Fine strainer
3. Coarse strainer
4. Pump suction nozzle
5. Differential pressure gauge
Fig. 5 Conical strainer for suction line
WKLn