24
Installation, Operation and Maintenance Manual
Dalamatic Insertable Dust Collectors – Series DLM V
MAINTENANCE
Monthly
Check operation of solenoid and diaphragm valves.
It may be necessary to check the operation of the valves while the system
is pressurised. Care should be taken to avoid injury.
If it is found necessary to replace a diaphragm, use the following procedure (see
fig. 16):
Use service kit available from Donaldson.
1 Remove 6mm diameter nylon tube (A) by pulling out from valve.
2 Remove the hexagon head set screws and shakeproof washers securing
the valve bonnet (B).
3 The diaphragm and spring (if fitted) can now be replaced, first ensuring the
‘bleed’ hole pin is not blocked.
4 Ensure that diaphragm fits over ‘bleed’ hole pin and that the nylon sealing
washer is inside throat of valve.
5 Position spring (if fitted) inside bonnet recess.
6 Refit bonnet ensuring spring (if fitted) locates over diaphragm disc shoulder
and bonnet locates over ‘bleed’ hole pin.
7 Refit and tighten the hexagonal head set screws and shakeproof washers.
8 Push-fit 6mm diameter nylon tube back into valve.
Figure 16 Valve diaphragm replacement
B
A
Manifold
Diaphragm Valve
