Repairs that may be carried out by qualified technical personnel, in
accordance with the operating instructions:
n Cleaning valves
n Replacing the diaphragm
All other repairs: Contact the responsible ProMinent branch!
13.1
Cleaning valves
Warning of faulty operation
Refer to the exploded drawings 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!
–
Recalibrate the pump after replacing a valve!
–
Using an Allen key or similar, insert it into the
smaller hole of the pressure 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 pressure 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 inte‐
grated in the dosing head and so has to be cleaned
separately!
–
With 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 pressure connector and push the
valve inserts out of it.
A suction valve is constructed in almost the same way as a discharge
valve.
Cleaning a discharge valve or a suction
valve on types (PP, PV, NP) 1000, 1601,
1602, 1604, 2504
Cleaning a discharge valve or a suction
valve on types (PP, PV, NP) 0708, 1008,
0220, 0420, 0413, 0713, 0232
Repairs
43
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