APV DELTA DA3+ SLD, Operating Manual

Page: 22 / 45

17
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
10.4 Installation of product-wetted seals and assembly of
the DELTA DA3SLD valve
Attention: See to all seals and bearing surfaces in the
product area being slightly greased before
their installation
(see lubrication chart: RN 260.064-1).
a. Install the lower shaft seal (36, 37) in the lower housing
flange (see page 19).
b. Place the quadring (33) and the guide band (32) in the
valve seat (6) .
c. Install the upper shaft seal (37, 36) in the valve seat.
Insert the PTFE ring (37) , at first. Then press the elastomer
ring (36) , the wide side to the front, into the groove between
PTFE seal and valve seat.
d. Install the upper and lower housing seals (35) .
e. Press the upper and lower seat seal (39) into the seat ring (40) .
Attention: The seal shoulder must fit properly into the
groove (see detail X).
f. Slide the seat ring (40) from the top over the compensating piston
of the upper valve shaft (5) .
g. Slide the valve seat (6) over the compensating piston of the
upper valve shaft (5) in the same way.
h. Insert the upper valve shaft (5) with seat ring (40) and
valve seat (6) through the actuator until it stops.
i. Fasten the valve shaft with safety disc (21) and safety nut (20) .
Holding the safety disc with a wrench SW24 prevents the safety
nut from turning.
Tightenting torque: Md = 40 Nm
j. Insert the middle seal (41) into the lower shaft (3) by means
of the assembly tool (see page 19).
Assembly without assembly tool:
Press the slightly greased seal at four spots into the groove.
Then press the four loops in by means of an even object.
Vent the seal groove at this occasion.
k. Insert the o-ring (42) in the lower valve shaft.
l. Install the o-ring (34) on the guide rod (4) .
m. Slide in the guide rod from the top through the actuator
until it stops.
n. Slide the lower valve shaft on the guide rod and fasten it with the
safety nut
(45) .
Tightening torque: Md = 40 Nm
Attention: Check the position of the lower seat
seal (36) (see detail X).
o. Screw in the stop screw (11) until it stops.
Tightening torque: Md = 15 Nm
p. Fasten the adapter for the control unit. Tighten the actuator
screw on the guide rod until it stops.
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