Samson 3271 - 9.4.1 Replacing the Gasket

9-8 EB 8026 EN
Servicing
9.4.1 Replacing the gasket
Risk of control valve damage due to incor-
rect servicing.
Î Only exchange the gasket in valves with-
out pressure balancing.
Î To replace the gasket in valve versions
with pressure balancing, contact our af-
ter-sales service.
a) Standard version
1. Undo the body nuts (14) gradually in a
crisscross pattern.
2. Unscrew the stem connector nut (9) and
lock nut (10) from the plug stem (5).
3. Loosen the threaded bushing (8) to avoid
damaging the packing.
4. Lift the ange (2) over the plug stem (5)
off the body (1).
5. Remove the gasket (17). Carefully clean
the sealing faces in the valve body (1)
and on the ange (2).
6. Insert a new gasket (17) into the body.
7. Place the ange (2) onto the body (1).
Mixing valve with V-port plug: align the
V-port plug, making sure that the largest
V-shaped port faces toward the side
valve outlet (AB). See information under
'Mounting the actuator onto the valve' in
the 'Installation' section.
8. Mixing valve <DN32: rmly press the
plug (5) into the bottom seat (141).
Diverting valve ≥DN32: rmly press the
plug (5) into the top seat (4).
Mixing valve: rmly press the plug (5)
into the bottom seat (141).
Tighten the nuts gradually in a crisscross
pattern. Observe tightening torques.
9. Tighten the threaded bushing (8). Ob-
serve tightening torques.
10. Loosely screw the lock nut (10) and stem
connector nut (9) onto the plug stem (5).
b) Version with insulating sec-
tion or bellows seal
1. Undo the body nuts (14) and nuts (33)
on the insulating section or bellows seal
gradually in a crisscross pattern.
2. Loosen the threaded bushing (8) to avoid
damaging the packing.
3. Continue as described for the valve ver-
sion concerned:
– “Valves with insulating section for di-
verting valves ≤DN25 and mixing
valves” on page9-8
– “Valves with bellows seal for divert-
ing valves ≤DN25 and mixing
valves” on page9-9
– “Valves with insulating section or bel-
lows seal for diverting valves
≥DN32” on page9-10
Valves with insulating section for diverting
valves ≤DN25 and mixing valves
4. Unscrew the stem connector nut (9) and
lock nut (10) from the plug stem exten-
sion (25).
NOTICE
!