Manual for the Design of Pipe Systems and Pumps - GEA ...

8.11 Assembly instructions
The suction pipe should be placed steadily ascending to the pump, the
supply pipe steadily descending to the pump.
The cone of a conical suction pipe upstream the pump should be acutely
conical in order to avoid deposits.
A conical suction pipe upstream the pump with top cone prevents soiling
on one hand, on the other hand it leads to the formation of air cushions
The pump should be adequately relieved from pipe forces acting on the
pump.
52
GEA Tuchenhagen
5 to 10 x DN
Never install a pipe bend directly upstream the pump. The distance
should be the five to tenfold in diameter of the inlet socket.
Avoid air cushions.
The pump’s delivery socket should be directed straight upward.
Connecting the pump to a tank, air drawing-off vortex should be avoided..