6.
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 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.
Slide sleeve (10.3) from underneath
onto the plug stem.
DN 65 and 80
Slide sleeve (11.1) over the plug stem.
Carefully place on the bonnet, while
guiding the plug stem through the top
plug (3.1), two sleeves (11.2 and 11.3)
and bottom plug (3.2) into the body and
at the same time remove the M12 screw.
Slide sleeve (11.4) from underneath
onto the plug stem.
7. First place the washer (12.1) and then
the pair of serrated lock washers (12.2)
onto the plug stem, making sure the
coarsely serrated surfaces of the lock
washers face each other and the radial
ribs face outwards.
Finger-tighten the nut (12) onto the plug
stem.
Note:
For nominal sizes DN 15 to 50, a
special tool designed to hold the washers
(12.1 and 12.2) can be ordered from
SAMSON (see table).
Especially on valves in nominal sizes DN 15
to 25, it is difficult to install the washers on
the plug stem due to insufficient clearance.
8. Slightly pull out the bellows housing
(5.2) together with the bellows assem-
bly. Place an open-end wrench at the
side on the hexagon or the flattened part
(X) of the plug stem to hold the stem sta-
tionary and to prevent the bellows from
turning.
CAUTION!
Do not turn the bellows seal.
EB 8135/8136 EN
15
Maintenance–replacing parts
2.2
2.1
12.1
12.2
12
3
Fig. 11 · Mixing valve DN 15 to 25
12.1
12.2
12
11.1
11.2
11.3
11.4
3.1
3.2
Fig. 12 · Mixing valve DN 65 and 80
