Installation and connection
5.3.4
Specifying pipe lengths
C
D
B
A
Fig. 6
Straight pipe lengths in front and after the
pumps (recommended)
A > 5x DNs
B DNs
C DNd
D > 5x DNd
Observe recommended minimum values when installing
the pump.
Suction side: Shorter lengths are possible, but may limit
hydraulic performance data.
Pressure side: Shorter lengths are possible, but may result
in increased noise development.
5.3.5
Provide self-priming container
A self-priming container can be used to make the pump
self-priming.
1. Select container volumes according to the size of the
pump.
2. Clean containers carefully prior to commissioning or initial
filling.
5.3.6
Optimizing changes of cross section and
direction
1. Avoid radii of curvature of less than 1.5 times the nominal
pipe diameter.
2. Avoid abrupt changes of cross-section along the piping.
5.3.7
Providing safety and control devices
(recommended)
Avoid contamination
1. Install filters in the suction pipe.
2. Install a differential pressure gauge with contact manome-
ter to monitor contamination.
Avoid reverse running
1. Install a non-return valve between the discharge flange and
stop valve, to ensure that the medium does not flow back
after the pump is switched off.
2. In order to enable venting, include vent connection
between discharge flanges and non-return valve.
Make provisions for isolating and shutting off the pipes
For maintenance and repair work.
Provide shut-off devices in the suction pipe and pressure
line.
Allow measurements of the operating conditions
1. Provide pressure gauge in the suction pipe and pressure
line for pressure measurement.
2. Provide motorside load monitors (over and underload).
3. Provide pressure measurement on the pump side.
Provide dry run protection
In order to protect the pump from dry running and resulting
damage
–
Provide dry run protection
–
e.g. PTM pressure and temperature monitoring sensor
16
SHM
BA-2018.08.21 EN
300 092
