Diaphragm liquid pump NF 1.25
Servicing
KNF Flodos AG
BA_NF1.25_EN_03_163242
Translation of Original Operating and Installation Instructions, English
17
Disassemble pump head
Undo the four head screws (
1
) using a Torx screwdriver T6
Remove the resonating diaphragm (
3
) from the connecting
plate (
4
).
Disassemble pump head
Remove both anchor valves (
7
) from the intermediate plate (
9
)
and the connecting plate (
4
)
Remove the two anchor valve seals (
6
) from the intermediate
plate (
9
)
Undo the diaphragm (
10
) by means of the head plate (
2
). Make
sure that no washers (
11
) fall into the housing.
We recommend replacing the diaphragm (
10
).
Cleaning the parts
Clean the anchor valves (
7
), the anchor valve seals (
6
) and the
diaphragm (
10
) with a cloth and then blow off with compressed
air.
Blow off the intermediate plate (
9
), connecting plate (
4
) and
head plate (
2
) with compressed air
Mounting the diaphragm
Screw diaphragm (
10
) with washer (
11
) into connecting rod
and tighten firmly. Make sure that no washers (
8
) fall into the
pump housing.
Use the head plate (
2
) to carefully tighten the diaphragm.
Mounting the valves and seals
Insert the seals (
6
) in the connecting plate (
4
).
Insert the anchor valves (
7
) in the intermediate plate (
9
) and
the connecting plate (
4
).
Mounting the pump head
Insert the intermediate plate (
9
).
ATTENTION: Make sure that the orientation is correct so that
the connections point in the right direction!
A pin and hole system prevents incorrect assembly.
Place the connecting plate (
4
) on top of the intermediate plate
(
9
)
Place head plate (
2
) on connecting plate (
4
) and secure using
the 4 head screws (
1
)
8.3. Replacing diaphragms, valves and seals
Same procedure as in Chapter 8.2, "Cleaning", except that instead
of cleaning the diaphragm (
10
), anchor valves (
7
) and seals (
6
),
these components must be replaced.
Fig. 10
1
Head screws
2
Head plate
3
Resonating diaphragm
4
Connecting plate
5
Clamp ring
6
Anchor valve seal
7
Anchor valve
8
Union nut
9
Intermediate plate
10
Diaphragm
11
Washer
