24 | Operation Manual MIDIDOS E | Maintenance
11.4 Valves
The dosing pump valves have to be cleaned on a regular basis.
CAUTION!
Chemicals may spray out causing caustic as well as other burns. Before working on the
pump, release any pressure and wash with water or another suitable medium.
NOTICE!
Unclean valves will reduce the dosing accuracy.
These valves are supplied without valve stops. The internal pieces could fall apart when
unscrewed.
Double-ball valve DN6 (MIDIDOS E24…E72)
Pressure valve
suction valve
Legend
1. 0-ring
2. *valve casing
3. 0-ring
4. *ball guide
5. *valve ball
6. valve seat*
7. 0-ring
*not included in
spare parts.
a
b
c
d
e
f
c
d
e
f
g
g
d
e
f
c
b
c
d
e
f
a
CAUTION!
NOTICE!
