APV DELTA DA3+ SLD, Operating Manual

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15
UK
DELTA DA3SLD-UK0.qxp / 12.2007
Double Seat Mixproof Valve with Seat Lift Detection
DELTA DA3+SLD
Operating Manual: Rev. 0
10. Service Instructions
10.2 Dismantling of the product-wetted seals ( service )
a. Unscrew the actuator screw from the guide rod.
b. Remove the adapter for the control unit.
c. Remove the lower and upper housing seal (35) from the
valve seat (6).
d. Release the lower safety nut (45) . Holding the lower shaft (3) with
a wrench SW17 prevents it from turning.
e. After removal of the nut, detach the lower shaft from the
guide rod (4).
Dismantling of middle seal (41)
f. Pierce the middle seal with a peaked object and pull it out of the
groove. Take the o-ring
(42) out of the groove.
g. Unscrew the stop screw (11).
h. Lift the guide rod (4) out to the top and remove the o-ring (34 ).
i. Remove the safety nut (20) . By holding the safety disc (21) with a
wrench SW24 it is prevented from turning. Remove the safety disc.
j. Lift off the spring cylinder (8) with main cylinder (9) and seat lift
cylinder (10) . (Service of main and seat lift cylinder, see 10.3 ).
k. Press the upper valve shaft (5) with seat ring (40) to the bottom
out of the valve seat (6) .
l. Slide the seat ring (40) over the compensating piston of the upper
valve shaft.
m. Remove the seat seals (39) from the groove (see detail X ).
n. Dismantling of upper shaft seal (37, 36)
Take a peaked object to pierce the seat seal (36) and pull it
out of the valve seat. Afterwards, remove the PTFE seal (37) .
o. Dismantling of lower shaft seal (37, 36) from the housing
Take the metal point of the disassembly tool to stick into the seat
seal
(36) from the top and pull it off to the top.
Afterwards, remove the PTFE seal (37) to the top through the
housing by means of the mandril of the assembly tool.
p.
Remove the seal ring (33) and guide band (32) from the groove of
the valve seat (6) .
11
20
21
8
10
4
32
33
34
35
35
6
X
5
3
6
X
5
detail X
35
37, 36
45
39
41
39
40
42
9
37, 36
3