Samson V2001 Series, Mounting And Operating Instructions

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12 EB 8135/8136 EN
Maintenance
5.1 Replacing the bellows seal
If the packing leaks, this is due to a defective
bellows seal. In this case, the entire bellows
seal assembly must be replaced together
with the packing (4.2).
We recommend renewing the top gasket
(5.3) and bottom gasket (1.2) at the bellows
housing as well.
Mixing and diverting valves in DN 32 to 80
differ in the arrangement of their plugs and
sleeves (see Fig. 1). Valves in DN 15 to 25
have the same plug and sleeve arrangement.
5.1.1 Disassembly
1. In valves ≤DN 50, unscrew the lock nut
(6.2) and stem connector nut (6.1) from
the plug stem.
2. Unscrew the coupling nut (5.1) from the
bellows housing.
3. Remove nuts (1.1) and lift off the flange
(5.4).
4. Pull out the bellows housing (5.2) and
bellows seal as far as they will go. Place
an open-end wrench SW 10 (≤DN 50)
or SW 13 (≥DN 65) at the side on the
hexagon (X) or at the flattened area of
the plug stem to hold the stem stationary.
Loosen the nut (12) and remove the
wrench.
5. Unscrew the nut (12). Remove the two re-
taining washers (12.2) and washer
(12.1).
6. DN 15 to 25
Carefully pull the plug stem (6) together
with the bellows seal (5) and bellows
housing (5.2) out of the body from
above.
DN 32 to 80
Keep hold of the bottom plug of diverting
valves or the bottom sleeve of mixing
valves on the plug stem. Use a long
screw (M8 for DN 32 to 50 and M12 for
DN 65 and 80) to keep the plugs (3.x)
and sleeves (10.x) in the right position.
Carefully pull the plug stem together with
the bellows seal (5) and bellows housing
(5.2) out of the body from above.
Guide the screw (to hold the plugs and
sleeves) into the valve body and push up-
wards, allowing the plugs and sleeves to
slide onto the screw.
7. Carefully clean all the parts and check
them for damage. Replace the plug stem
together with the bellows seal and pack-
ing with new parts.