13.1 Cleaning valves
Personnel:
n
Technical personnel
Warning of faulty operation
Refer to the exploded views in the Appendix when working
on the unit.
Warning of faulty operation
–
Discharge and suction valves differ from each other!
Only take them apart one after each other, so that you
do not confuse the components!
–
Only use new components which fit your valve - both in
terms of shape and chemical resistance!
–
Readjust the pump after replacing a valve!
–
Using an Allen key or similar, insert it into the smaller
hole of the discharge connector and push the valve
inserts out of it.
A suction valve is constructed in almost the same way as a discharge
valve.
Please note, however, that:
n the two valve inserts are identical here
n There is an additional spacer between the valve inserts.
n There is a shaped seal in the dosing head instead of an O-ring.
n The flow direction of the suction connector is the opposite to that of
the discharge connector.
Warning of faulty operation
–
Discharge and suction valves differ from each other!
Only take them apart one after each other, so that you
do not confuse the components!
–
Only use new components which fit your valve - both in
terms of shape and chemical resistance!
–
With the PVT material version, the ball seat is integrated
in the dosing head and so has to be cleaned separately!
–
On the PVT material version, the discharge valve is a
double ball valve!
–
Using an Allen key or similar, insert it into the smaller
hole of the discharge connector and push the valve
inserts out of it.
A suction valve is constructed in almost the same way as a discharge
valve.
Please note, however, that:
n The flow direction of the suction connector is the opposite to that of
the discharge connector.
Cleaning a discharge valve for types
0730, 1020, 1612, 1608, 2508
Cleaning a suction valve for types 0730,
1020, 1612, 1608, 2508
Cleaning a discharge valve for types
0280, 0450
Cleaning a suction valve for types 0280,
0450
Repairs
76
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