Reassembling The Head - Valve Units - Pratissoli KT Serie Manual De Reparación

The suction and outlet valve units can be dismantled by
screwing a sufficiently long M10 screw in such a way as to be
able to reach the valve plate and extract the valve guide from
the valve seat (Fig. 20), pos. . If the threaded holes should
not be present on the valve guides, dismantling can be easily
carried out by levering with simple tools (Fig. 21).
If the suction and outlet valve seats remain
Fig. 18
stuck on the head (for example scaling due to a
prolonged pump inactivity), operate as follows:
KT 24-28-30-32- WK155-WK6 versions use tools code
26019400, code 27513700 (Fig. 22);
KT 36-40-WK8 versions use tools code 26019400,
code 27516900;(Fig. 22);
KT 36-40-WK8 versions use tools code 26019400,
code 27513700 (Fig. 22).
Fig. 19
2.2.2 Reassembling the head – valve units
Pay particular attention to the conditions of the
various components and replace 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 both in the valve units and on
the valve plugs.
Before repositioning the valve units, thoroughly
clean and dry the relative seats in the head as shown
Fig. 20
in (Fig. 23).
21
Suction and outlet valves
Suction valves
Outlet valves
code 26019400
code 27516900
code 27513700
Fig. 21
Fig. 22