Diaphragm liquid pump NF 2.35
Servicing
KNF Flodos AG BA_NF2-35_EN_02_164912
Translation of original Operating and Installation Instructions
16
8.2.2. Disassembling the pump head
Loosen the four head screws (
1
).
Remove resonating diaphragm (
4
) and seal (
3
) from the con-
necting plate (
5
).
Take both O-rings (
8
) and anchor valves (
9
) out of the connect-
ing plate (
5
), together with the intermediate plate (
10
).
Remove diaphragm (
11
) by hand. Make sure that no washers
(
12
) fall into the pump housing.
Remove insert ring (
13
).
Clean any residues thoroughly off all parts. Purge and dry with
compressed air.
For maximum leak-tightness it is recommended that, after
opening the pump head, the rubber parts { diaphragm (
11
),
anchor valves (
9
), seals (
8
), seal(
3
) },
resonating diaphragm (
4
) and connecting plate (
5
) should be
replaced and new hoses used.
8.2.3. Assembling the pump head
Place insert ring (13) in pump housing.
Screw diaphragm (
11
) with washer (
12
) into connecting rod.
Make sure that no washers (
12
) fall into the pump housing.
Fully tighten the diaphragm by hand.
Place O-rings (
8
) and anchor valves (
9
) in intermediate plate
(
10
) and connecting plate (
5
).
Bring together intermediate plate (
10
) and connecting plate (
5
),
making sure that they are aligned correctly with one another.
Place intermediate plate (
10
) and connecting plate (
5
) on the
pump housing together.
Place resonating diaphragm (
4
) and seal (
3
) in connecting
plate (
5
).
Place head plate (
2
) on connecting plate (
5
) and secure using
the 4 head screws (
1
).
CAUTION
Escaping liquid
After assembly the pump may not be leak-tight due
to incorrect assembly, damaged or soiled seal faces,
or other reasons.
➔
Run pump for several minutes with a harmless
liquid at maximum operating pressure.
➔
Check that pump is leak-tight.
Fig. 7: Head parts
1
Head screws
2
Head plate
3
Seal
4
Resonating diaphragm
5
Connecting plate
6
Seals
7
Plug insert
8
Seals
9
Anchor valves
10
Intermediate plate
11
Pump diaphragm
12
Washers
13
Insert ring
