Tighten nut (12) to fasten the plug and
sleeves:
Valve DN 15 to 50 DN 65 to 80
Nut (12) 15 Nm 25 Nm
Remove the open-end wrench.
9. Align flange (5.4) to the bellows housing
(5.2), making sure the body gasket (1.2)
is correctly positioned.
Tighten nuts (1.1):
Valve DN 15 to
25
DN 32 to
50
DN 65 to
80
Nuts (1.1) M10
10 Nm
M12
30 Nm
M16
90 Nm
Firmly tighten the coupling nut (5.1) with
80 Nm.
10. DN 15 to 50:
Thread the lock nut (6.2) and stem con-
nector nut (6.1) onto the top end of the
plug stem.
Adjust the stem connector nut (6.1) to
keep the dimension of 50 mm between
the top of the bellows assembly (5) and
the top of the stem connector nut (6.1)
when the plug stem is completely in
-
serted into the valve. Refer to the dimen
-
sional diagram on page 23.
Mount the actuator following the instructions
in the corresponding mounting and operat
-
ing instructions.
4.2.2 Diverting valve
Disassembly
1. Unscrew the stem connector nut (6.1)
and lock nut (6.2) from the plug stem of
valves in DN 50 or smaller.
2. Unscrew the coupling nut (5.1) from the
bellows housing. Remove the nuts (1.1)
and lift off the flange (5.4).
3. Pull the bellows housing (5.2) with the
bellows assembly out of the body as far
as they will go. Place an open-end
wrench (SW 10 for
£
DN 50 or SW 13
for
³
DN 65) at the side on the hexagon
(X) or at the flattened area of the plug
stem to hold it stationary. Undo nut (12)
and remove wrench.
4. Unthread nut (12). Remove two lock
washers (12.2) and washer (12.1).
Maintenance–replacing parts
16 EB 8135/8136 EN
1.1
6.1
6.2
5.3
5
5.2
X
5.4
1.2
4.2
4.3
5.1
Fig. 13 · Valve bonnet with bellows seal
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