Quattroflow Installation, Operation & Troubleshooting Guide
Rev. 0
Page 9 of 25
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3.4
Medium with high viscosity
Generally Quattroflow pumps can handle medium viscosities
up to 1000 mPa*s
(cP)
. The higher the viscosity
of the medium the lower is the maximum reachable flow rate of the pump (see Table 3 below).
Please make sure that the pump is always operated in the linear range of the performance curve (see Figure
4). If the pump is operated at higher motor speeds outside the linear flow range, damage of diaphragms may
occur.
Pump size /
eccentric shaft
Max. flow rate
@ 500 mPa*s (cP)
Max. flow rate
@ 1000 mPa*s (cP)
QF150 / 5°
120 l/h
50 l/h
QF1200 / 5°
700 l/h
500 l/h
QF4400 / QF5050 / 6°
4000 l/h
3500 l/h
Table 3 Max. flow rates at different dynamic viscosities for different Quattroflow Pumps.
Figure 4: Max. flow rate for viscous media (exemplary)
