Quattroflow Installation, Operation & Troubleshooting Guide
Rev. 0
Page 13 of 25
www.quattroflow.com
5.4
Priming
Quattroflow pumps are self-priming and can run dry (no use of mechanical seals).
Please note that the pump needs to be properly primed in order to achieve a stable flow and low pulsation. A
minimum flow rate is required for the priming (complete removal from air inside the pump chamber). The
following table indicates the minimum required pump speed for water with <0.5 bar discharge pressure.
Please note that these values may depend on the installation. The duration of the vent process at a given
min. pump speed is generally from 5 to 10 seconds.
Pump size /
eccentric shaft
Min. pump speed for
self-venting at free output
Min. flow rate for
self-venting at free output
QF150 / 5°
ca. 1000 rpm
ca. 75 l/h
QF1200 / 5°
(Standard)
ca. 500 rpm
ca. 300 l/h
QF1200 / 3°
ca. 900 rpm
ca. 300 l/h
QF4400 / QF5050 / 6°
(Standard)
ca. 500 rpm
ca. 3.200 l/h
QF4400 / QF5050 / 3°
ca. 700 rpm (ca. 80 sec.)
ca. 2250 l/h (ca. 80 sec.)
QF20K / 7°
ca. 150 rpm
ca. 4.000 l/h
Table 4 Minimum pump speed and flow rate for self-venting at free output (Water @ RT)
The following table shows the suction high for each pump size. Please note that these values may depend on
the installation.
Pump size /
eccentric shaft
Pump speed
Suction lift (dry)
QF150 / 5°
3000 rpm
2,0 – 3,0 m
QF1200 / 5°
(Standard)
1800 rpm
4,0 – 4,5 m
QF1200 / 3°
1800rpm
2,5 – 3,0 m
QF4400 / QF5050 / 6°
(Standard)
1200 rpm
4,0 – 4,5 m
QF4400 / QF5050 / 3°
1200 rpm
2,5 – 3,0 m
QF20K / 7°
780 rpm
4,0 – 4,5 m
Table 5 Suction high and respective pump speed (Water @ RT)
