SPX APV DELTA SDU4, Operating Manual, Page: 16 / 39

11
10. Service Instructions
Delta SDU 4
The item numbers refer to the corresponding spare parts lists
DN: RN 01.054.64 / Tube: RN 01.054.064-1
I. Dismantling from the line system
a. Shut off line pressure and discharge lines if possible.
b. Remove the control unit (27) from the actuator (23).
(Turn the ring in anticlockwise direction and remove the cover.)
c. Detach the separating connection in the line system (continuing from
the side valve housing port at the upper valve housing).
d. Shut off and discharge the CIP supply line.
e. Remove the CIP supply and drain from the leakage valves.
f. Remove the link joint (5) at the lower housing (1).
g. Dismantle the complete valve (actuator, valve insert and upper valve
housing) from the line system.
II. Dismantling of product-wetted seals (service)
a. Remove the lower housing seal (4).
b. Screw off the operating cam.
c. Unscrew the hexagon nut (26) by holding against the centering
disk (25). Remove the centering disk.
d. Pull the lower valve shaft (6) out of the actuator (23). Remove the
seat seals (3).
( assembly see 10.IV.i.)
e. Control the actuator with air. For this purpose, remove the
connecting hose from the control unit to the T-piece.
Control the actuator with compressed air at the T-piece.
Do not reach for movable parts.
Risk of injury.
f. Remove the housing flange screws (14).
g. Shut off compressed air and compressed air supply. Remove the
connecting hoses to the leakage valves. Lift the valve insert out of
the upper housing (2/2.1).
h. Take the upper valve shaft (7) out of the yoke (12). Remove the
seat seals (15 / 15.1, 16) and (17).
i. Unscrew the yoke (12) from the actuator (23).
Remove the housing seal (8). Take off the seat seal (9),
shaft seal (10) and guide bush (11).
Double Seal Change-Over Valves
Delta SDU 4
Operating Manual Rev. 1
27
26
25
23
24
11
8
14
12
9, 10
15
16
17
2/2.1
7
6
5
4
3
1
modified
from 11/2000
15.1
ope
ra
ting cam
UK