Notes On Installation On Delivery Side - ProMinent alpha Series General Operating Instructions

Installation, hydraulic
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4.3

Notes on Installation on Delivery Side

IMPORTANT
Do not exceed permissible nominal pressure! Otherwise the pump may be damaged!
Provide an overpressure facility if the permissible pressure in the pump head can be
exceeded, e.g. by closing a shut-off element or a blockage in the line:
• Install overflow valve in the delivery line or
• use an overflow valve integrated in the pump housing (depending on type, refer to
data sheet of the type of pump used).
The following points must be observed with regard to the overflow line when using an
overflow valve:
• Route the overflow line with a drop into the supply tank under atmospheric pressure
or into an open runoff channel.
• Connect the overflow line to the intake line, however, only if there is no check valve in
the intake line.
IMPORTANT
Do not use a non-return check valve on the intake side for the overflow return as it may
cause the intake line to tear off.
IMPORTANT
Cut off the return flow from the main line!
Otherwise unwanted mixing in the metering line can occur.
• Install the metering valve at the injection point.
IMPORTANT
Dampen pulsation by installing pulsation dampers if
• low-pulsation delivery flow is required for process reasons;
• acceleration forces have to be reduced due to the geometry of the piping system.
The following can occur if acceleration forces are not dampened
• Fluctuations in delivery, metering faults, pressure surges, valve knocking and wear
as a result of cavitation on the intake and delivery side of the pump.
• Mechanical destruction of pump, leakages and knocking of valves as a result of the
permissible maximum pressure being exceeded on the pump delivery side.
ProMinent ProMinent ® ®