EB 8135/8136 EN
17
Maintenance
12.1
12.2
12
11.1
11.2
11.3
11.4
3.1
3.2
Fig. 11:
Mixing valve DN 65 and 80
1.
Apply a suitable lubricant to the gasket
(5.3) and thread on the bellows housing.
2.
Insert the gasket (5.3) on the bellows
housing (5.2).
3. Push the bellows seal (5) together with
the plug stem into the bellows housing.
Tighten the coupling nut (5.1) by hand
only at first.
4. Apply a suitable lubricant to the thread
and the sealing cone of the new or ma-
chined seats.
5. Use the seat wrench to screw in the bot-
tom seat (2.2), observing the correct
tightening torques:
Valve size
15 to 25
32 to 50
65 to 80
Seat thread
M32 x 1.5 M58 x 1.5 M90 x 1.5
Tightening
torque
120 Nm
500 Nm
1050 Nm
6.
DN 15 to 25
Insert the plug (3) into the bottom seat
(2.2).
DN 32 to 50
Insert the bottom plug (3.2) into the bot-
tom seat (2.2).
Place the short sleeve (10.2) and top
plug (3.1) one after the other onto the
bottom plug. To fix them into position, in-
sert a long M8 screw through the bottom
plug.
DN 65/80
Insert the bottom plug (3.2) into the bot-
tom seat (2.2).
Place the two short sleeves (11.3 and
11.2) and top plug (3.1) one after the
other onto the bottom plug. To fix them
into position, insert a long M12 screw
through the bottom plug.
7. Screw the top seat (2.1) into the body,
ensuring that the top plug can easily
slide into the seat. Refer to table in step 5
for the correct tightening torque.
8.
Insert the gasket (1.2) into the top valve
flange.
9.
DN 15 to 25
Carefully place the bonnet onto the
valve, while guiding the plug stem into
the plug (3).
DN 32 to 50
Slide the sleeve (10.1) over the plug
stem. Carefully place on the bonnet,
while guiding the plug stem through the
top plug (3.1), sleeve (10.2), and bottom
plug (3.2) and, at the same time, remove
the M8 screw.
Summary of Contents for V2001 Series
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