14
Fault Cause Remedy
4. Dosing flow of the a) Dosing head not fully deaerated. Repeat the deaeration.
pump is inaccurate.
b) Degassing medium. Check the installation.
c) Parts of the valves covered in dirt or Clean the valves.
incrusted.
d) Counter-pressure fluctuations. Install a pressure-loading valve and a
pulsation damper, if necessary.
e) Suction lift fluctuations. Keep the suction level constant.
f) Siphon effect (inlet pressure higher Install a pressure-loading valve.
than counter-pressure).
g) Leaking or porous suction line or Replace the suction line or discharge
discharge line. line.
h) Parts in contact with the medium are Replace with resistant materials.
not resistant to it.
i) Dosing diaphragm worn (incipient Replace the diaphragm. Also observe
tears). the maintenance instructions.
j) Variation of the dosing medium Check the concentration. Use an
(density, viscosity). agitator, if necessary.
5. Liquid leaks out of a) A diaphragm leakage has occurred. Replace the diaphragm.
the hole in the
intermediate flange
between the pump
and the dosing
head.
11. Disposal
This product or parts of it must be disposed of in an environmentally sound way:
1 Use appropriate waste collection services.
2 If this is not possible, contact the nearest Grundfos or Grundfos Alldos company or service workshop.
To Next Page
Loading...
Need help?
General
