KNF N963, Инструкции по эксплуатации и монтажу

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Diaphragm Pump N936 Servicing
Translation of Original operating and installation instruction, English, KNF 320276-320275 09/19 23
Removing pump heads
12
10
9
8
7
M
Fig. 5 Pump N936
1. Mark the position of head plate (12), intermediate plate (8) and pump
housing (9) with respect to one another by means of a continuous line
made with a felt-tip pen (M) to ensure proper mounting.
2. Loosen the four head plate screws (7).
3. Remove pump head (consisting of head plate (12) and intermediate
plate (8) together from the pump housing (9).
7
12
13
14
8
15
16
17
18
Fig. 6 Pump head (exploded view,
symbolic)
Changing the diaphragm
1. Turn the fan (10) to move the diaphragm (17) to the lower reversal
point.
2. Loosen the retainer plate screw (15) and remove the retainer plate
(16).
3. Remove diaphragm (17) from the receiver.
4. Check all parts for soiling and clean if necessary (for further informa-
tion, see Chapter 9.2 Cleaning ).
5. Move the connecting rod to the upper reversal point (connection part
between drive shaft and diaphragm) to the upper reversal point by
turning the fan (10).
6. Replace O-ring (18) under the retainer plate with a new one.
7. Insert the new diaphragm (17), position the retainer plate (16) and
screw onto the connecting rod with the retainer plate screw (15) (tight-
ening torque: 9 Nm).
The self-locking countersunk screw (15) can only be used once.
Replacing valves and O-rings
1. Separate head plate (12) from intermediate plate (8).
2. Remove the valves (14) and O-rings (13) from the intermediate plate
(8).
3. Check valve seats, intermediate plate and head plate for cleanliness;
replace these parts in the event of unevenness or scratches.
4. Inserting valves and O-rings:
Insert the new valves (14) and O-rings (13) in the valve seats and in
the O-ring groves of the intermediate plate (8).
The valves and O-rings for the pressure and suction side are identi-
cal; the same applies for the top and bottom of the valves and O-
rings.
5. Place head plate (12) on intermediate plate (8) according to the felt-tip
pen marking (M).
6. With a slight lateral movement of the head plate (12), check its center-
ing.
7. Properly dispose of replaced diaphragm, valves and O-rings.
Mounting pump heads
1. Place the pump head on the housing according to the marking (M).
2. Only slightly tighten the screws (7) crosswise.