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Instruction

APP pump instruction APP 0.6-1.0, APP 1.5-2.5 and APP 3.0-3.5

2.4 General guidelines for calculation of

pressure losses

In order to avoid the risk of cavitation, the inlet

pressure at the pump must be in accordance

with the speciﬁcations mentioned in Data

sheet (521B0850).

Filtration

A good ﬁltration is vital to ensure a long and

trouble free life of the pump.

When selecting a filter or strainer, please note

that filter materials should be compatible with

water, i.e. should neither corrode or dissolve. Also

be aware of the electrochemical series of the

applied materials.

Main filter must have a fineness of 10 μm abs.

ß 10 >5000. The pressure loss across the filter

should be monitored.

180R9065 / 521B0733 / DKCFN.PI.013.C4.2T / 09.2012

The inlet line connection must be properly

tightened, as possible entrance of air will cause

cavitation.

The suction conditions can be optimized

according to below guidelines.

In smooth pipes and hoses

In 90° bends

Water tank

Must be made of corrosion-proof material such

as stainless steel or plastic and must be sealed to

prevent entrance of impurities from the environ-

ment.