Diaphragm liquid pump NF 1.25
Troubleshooting
KNF Flodos AG
BA_NF1.25_EN_03_163242
Translation of Original Operating and Installation Instructions, English
19
Flow rate, suction head or pressure head is too low
The pump does not achieve the performance stated in the technical data or on the data sheet.
Cause
Fault remedy
Components in the system
connected to the suction and
pressure sides, such as hoses,
valves or filters, are causing too
much resistance
➔
Modify installation, check cross-sections of components
Hose connections are not leak-
tight
➔
Secure transition joints between hose and hose connectors
with clamps or other clamping elements
Particles in the pump
➔
Clean the pump head, install suction-side filter if required
(see Chapter 8.2).
Viscosity of the transferred
medium is too high
➔
Contact KNF
Incorrect interchange of pres-
sure and suction line connec-
tions
➔
Remove pressure and suction lines and re-connect correctly
The pump parts are not re-
sistant to the medium to be
pumped
➔
Replace the pump head with a compatible version
Tab. 14
Fault cannot be rectified
If you are unable to identify any of the above causes, please send the pump to KNF customer services
(see address on last page).
Flush the pump to clear the pump head of any hazardous or
aggressive fluids (see Chapter 8.2.1).
Dismantle the pump.
Clean the pump (see Chapter 8.2.2).
Send the pump to KNF customer services along with the
completed decontamination declaration (see Chapter 10).
Please indicate the medium that the pump is used to transfer.
