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4
Assembly
4.1 Installation surroundings
User qualification, installation: trained qualified personnel, see
n
Ä Chapter 2.2 'Users' qualifications' on page 6
CAUTION!
Possible consequence: Slight or minor injuries. Mate‐
rial damage.
Observe the permissible ambient conditions.
Upright installation
Install the double diaphragm pump upright and plumb.
The valves of the double diaphragm pump operate
when loaded by gravity. The valve balls are pressed by
gravity into the valve seat and seal it off. Installation
outside the vertical axis impairs the function of the
valves.
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.
Keep the suction line short and the number of pipe valves small.
Do not reduce the diameter of the suction line. If a rigid pipework
system is used, short flexible hose pieces should be inserted
between the double diaphragm pump and pipework to protect the
double diaphragm pump against vibration and tensile and com‐
pressive forces. The installation of a pulsation damper is recom‐
mended to reduce pulsations in the pumped medium.
Assembly
11
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