Reassembly
1. Apply lubricant (order no. 8150-0119)
to the seal (5.3) and the threaded part
of the bellows housing.
Place seal (5.3) on the bellows housing
(5.2).
Insert the bellows assembly (5) with plug
stem into the bellows housing.
Finger-tighten the coupling nut (5.1) at
first.
2. Apply lubricant (order no. 8150-0119)
to the thread and sealing cone of the
new or machined seats.
3. Use the seat wrench to screw in the bot-
tom seat (2.2), observing the correct
tightening torques:
Valve
DN 15 to
25
DN 32 to
50
DN 65 and
80
Seat thread
M32x1.5
M58x1.5
M90x1.5
Tightening
torque
120 Nm
500 Nm
1050 Nm
4.
DN 15 to 25
Insert plug (3) into bottom seat (2.2).
DN 32 to 50
Insert bottom plug (3.2) into bottom seat
(2.2).
Place the short sleeve (10.2) and top
plug (3.1) one after the other onto the
bottom plug. To keep them in order, in-
sert a long M8 screw through the bottom
plug.
DN 65 and 80
Insert bottom plug (3.2) into bottom seat
(2.2).
Place two short sleeves (11.3 and 11.2)
and the top plug one after the other onto
the bottom plug. To keep them in order,
insert a long M8 screw through the bot-
tom plug.
5. Screw top seat (2.1) into the body, en-
suring that the top plug can easily slide
into the seat. Use tightening torque listed
in the table for step 3.
Insert body gasket (1.2) into top valve
flange.
Maintenance–replacing parts
14
EB 8135/8136 EN
AB
A
B
12.2
12
12.1
1.1
6.1
6.2
5.3
5
5.2
X
5.4
1.2
4.2
4.3
5.1
3.2
Fig. 10 · Mixing valve DN 32 to 50
