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4.2 Ambient conditions
4.3 Layout of the suction side
NOTICE!
Ambient conditions
Possible consequence: Property damage and
increased wear and tear
Assembly is to be carried out in the following order. If
the pump has to be installed outdoors, then it is to be
equipped with protection against sunlight and weather
influences.
When positioning the pump, ensure that sufficient
room for access is provided for all types of mainte‐
nance work.
Nominal width of the pipework
The threaded connectors must not reduce the nominal
width of the pipework or the double diaphragm pump.
The hydraulic connectors have internal and external
threads. Do not screw threaded fittings on to the
internal thread as this would lead to a reduction of the
nominal width.
Dimensioning of the suction side
Layout the suction side with generous dimensions. The
supply of the double diaphragm pump with the liquid to
be pumped must be ensured under all load and oper‐
ating statutes. Ensure that the inside diameters of the
suction lines are generously sized.
To ensure a maximum service life of the diaphragm, the double
diaphragm pump should be installed as close as possible to the
pumped medium. If there is a positive priming pressure on the suc‐
tion side of more than 3.0 m water column, the fitting of a back
pressure valve in the air outlet of the double diaphragm pump is
recommended in order to protect the diaphragm. The minimum air
pressure to operate the double diaphragm pump is approximately 1
bar.
Assembly
13
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