5. Pull the bellows assembly (5) from the
bellows housing and remove body gas
-
ket (1.2).
Clean all parts thoroughly and check
them for damage.
Replace defective parts.
6. DN 15 to 25
Unscrew top seat (2.1). Take plug (3)
out of the body and remove bottom seat
(2.2).
DN 32 to 50
Remove top seat (3.1) together with the
three sleeves (10.1, 10.2, 10.3) from
the body.
DN 65 and 80
Remove top seat (3.1) together with the
four sleeves (11.1, 11.2, 11.3, 11.4)
from the body.
7. DN 32 to 80
Use a suitable seat wrench (see
page 20) to unscrew the top and bottom
seat (2.1, 2.2) out of the body.
Remove bottom plug (3.2) from the
body.
Carefully clean all parts and check them
for damage. If necessary, machine or
replace any defective parts.
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. DN 15 to 25
Screw in bottom seat (2.2) and tighten:
Valve
DN 15 to 25
Seat thread
M32 x 1.5
Tightening torque
120 Nm
Place plug (3) in bottom seat. Screw in
top seat (2.1) allowing the plug to slide
into the seat from underneath. Tighten
top seat with the same tightening torque.
DN 32 to 50
Insert bottom seat (3.2) into the body.
Use the seat wrench to screw in the bot
-
tom seat (2.2) and top seat (2.1) one af
-
ter the other:
Valve
DN 32 to 50
Seat thread
M58 x 1.5
Tightening torque
500 Nm
EB 8135/8136 EN 17
Maintenance–replacing parts
2.2
2.1
10.1
10.2
10.3
3.2
3.1
Fig. 14 · Diverting valve DN 32 to 50
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