Diaphragm-liquid pump NF 1.60
Troubleshooting
KNF Flodos AG BA_NF1.60_EN_05_161566.docx
Translation of Original Operating and Installation Instructions
18
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 connections
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 pumped
medium is too high
Contact KNF
Incorrect interchange of outlet
and inlet line connections
Remove outlet and inlet lines and re-connect correctly
The pump parts are not
resistant to the medium to be
pumped
Replace the pump head with a compatible version
Tab. 13
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).
1. Flush the pump to clear the pump head of any hazardous or
aggressive fluids (see Chapter 8.2.1).
2. Dismantle the pump.
3. Clean the pump (see Chapter 8.2.2).
4. Send the pump, with completed decontamination declaration
(see Chapter 10), to KNF customer services stating the nature
of the pumped medium.
