Diaphragm liquid pump NF 300
Servicing
KNF Flodos BA_NF300_EN_08_068697.docx
Translated from the Original Operating and Installation Instructions
23
8.3. Replacing parts
Same procedure as in section 8.2, "Cleaning"
– with the exception
of step 6:
Instead of cleaning the diaphragm (
16
), O-ring Ø14.5 (
5
), O-ring
Ø39 (
11
), diaphragm.27 (
9
), resonating diaphragm (
10
) and valve
plate (
14
), these components must be replaced.
8.4. Adjusting the overflow
Test set-up/instrumentation as shown in the diagram.
Test set-up for overflow
Fig. 15: Test set-up for overflow
Switch on the pump and run until there are no air bubbles in
the system.
Close the valve downstream of the pressure gauge and check
the overflow pressure at the gauge.
Undo the hexagon nut (
3
).
To reduce the pressure, turn the setscrew (
4
) anti-clockwise, to
increase the pressure, turn it clockwise.
Use the hexagon nut (
3
) to secure the setscrew (
4
) in the
selected position.
Make sure that the container (a),
pump (b),
pressure gauge (c) and valve (d)
are as level as possible (+/- 15 cm)