Diaphragm pump N 2400.15
Servicing
Translation of original Operating and Installation Instructions, english, KNF 308934-308937 09/18
31
11. Completely cover the thread start of the retainer plate (
10
) and
the threaded hole of the diaphragm support (
9
) with adhesive.
Then screw the retainer plate into the diaphragm support.
Before you screw in the retainer plate completely, unscrew it
360 degrees to ensure that the thread flanks of the retainer
plate and the diaphragm support, respectively, are coated with
adhesive.
Be sure to observe the adhesive’s USE BY date!
Adhesive might not be as effective if used after its USE BY
date.
12. Tighten the retainer plate (
10
) firmly; use the wrench for retain-
er plate to do so (tightening torque: 20 Nm).
Be sure to allow the adhesive to cure before restarting the
pump.
Adhesive curing lasts approx. 24 hours!
13. Carry out steps 1 to 12 for the second pump head.
Changing reed valves
1. Remove the two O-rings (
7
) from the intermediate plate (
14
).
2. Undo the two screws (
2
) and remove valve limiters (
3
) and
reed valves (
5
) from the intermediate plate (
14
).
3. Fit new reed valves and valves limiters on pressure and suc-
tion sides.
Take care that the reed valves are symmetrically to the valve
bore.
4. Carry out steps 1 to 3 for the second pump head.
Mounting pump head
1. Place intermediate plate (
14
) on housing (
13
) according to the
mark made previously (at the same time, keep the diaphragm
in its mid-position by holding the motor fan).
2. Fit the two new O-rings (
7
) in the intermediate plate (
14
).
3. Place head plate (
4
) on intermediate plate (
14
) according to
the mark made previously.
4. Screw the hexagon socket head cap screws (
1
) and (
6
) in one
or two turns.
5. Tighten the two hexagon socket head cap screws (
6
) (tighten-
ing torque: 6 Nm); then tighten the six hexagon socket head
cap screws (
1
) diagonally (tightening torque: 9 Nm).
In order to ensure the required gas tightness of the pump head
after maintenance, a leak test must be carried out.
Summary of Contents for N 2400.15
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