housing (5.2) upwards out of the body.
Guide the screw (to hold the plugs and
sleeves) into the body and push up-
wards, allowing the plugs and sleeves to
slide onto the screw.
6. Clean all parts thoroughly and check
them for damage.
Replace the plug stem together with the
bellows seal and packing.
4.1.2 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) together
with plug stem into the bellows housing.
Finger-tighten the coupling nut (5.1) at
first.
Insert body gasket (1.2) into the body.
2.
DN 15 to 25:
Place ready-assembled bellows assem-
bly on the valve body, while guiding the
plug stem through the holes in the plug.
DN 32 to 80:
Gradually insert the plug stem of the
ready-assembly bellows assembly (5)
into the valve body, allowing the plugs
and sleeves to slide from the screw (used
to hold the plugs and sleeves) onto the
plug stem.
3. 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.
Screw the nut (12) onto the plug stem by
hand.
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.
Maintenance–replacing parts
EB 8135/8136 EN
11
2.2
2.1
12.1
12.2
12
3
Fig. 5 · Mixing valve DN 15 to 25
2.2
3.2
3.1
2.1
10.2
10.3
10.1
Fig. 6 · Mixing valve DN 32 to 50
