Interpump Group Pratissoli EV-E4 Serie Manual De Reparación página 18

The suction and outlet valve units dismantling can be carried
out by levering with simple tools (Fig. 19).
If the suction and outlet valve seats remain
stuck on the head (for example scaling due to a
prolonged pump inactivity), operate as follows:
Suction and outlet valves
use tools code 26019400, code 27513700 (Fig. 20);
Fig. 17
2.2.2 Reassembly of the head – valve units
Pay particular attention to the conditions of the
various components and replace them if necessary,
and at the intervals indicated in the "PREVENTIVE
MAINTENANCE" table in chapter 11 of the Use and
maintenance manual.
At every valve inspection, replace all O-rings and all
anti-extrusion rings in the valve units.
Before repositioning the valve units, thoroughly
clean and dry the relative seats in the head as shown
in (Fig. 21).
Fig. 18
Fig. 19
18
code 26019400
code 27513700
Fig. 20
Fig. 21