Cleaning The Suction And Discharge Valves - Grundfos DMX 227 Installation And Operating Instructions Manual

10.3 Cleaning the suction and discharge valves

If possible, rinse the dosing head, e.g. by supplying it
Caution
with water.
If the pump loses capacity, clean the suction and discharge
valves as follows:
See fig. 18.
1. Loosen the cap nuts (8) on the supporting ring (1).
2. Remove the valve housing (2/9) and other parts of the valve.
3. Remove the other internal parts, and clean or replace, if
necessary.
4. Re-assemble the valve according to the exploded view below.
5. Refit the valve.
9
11
Fig. 18 Exploded view of the valves
Pos. Components
1 Supporting ring
2 Valve housing
3 Valve seat
4 Valve disk
6 Double-end stud
7 Washer
8 Cap nut
9 Valve housing
10 Flange
11 O-ring
12 O-ring
13 O-ring
14 Spring
15 Valve disk
The O-rings must be correctly placed in the specified
Caution
groove.
8 7
6 x
13 10 14 4
6
1 2 11 15 12 3
17