SPX APV DELTA SDU4, Operating Manual, Page: 18 / 39

13
10. Service Instructions
Double Seal Change-Over Valves
Delta SDU 4
Operating Manual Rev. 1
V. Installation of seals and assembly of valve
The item numbers refer to the corresponding spare parts lists
RN: 01.054.65 DN / 01.054.64-1 Tube
a. Slightly grease the housing seal (8) and insert it into the groove
of the yoke flange. Place the guide bush (11) in the yoke (12).
Then insert the shaft seal (10) and press in the slightly greased
seat seal (9).
See to the correct direction of installation.
b. Install the yoke (12) on the actuator (23).
c. Slightly grease the seat seal (3) and insert it into the upper shaft (7).
Insert the two seat seals (15 / 15.1, 16) into the upper shaft (7).
Slightly grease the seat seals before their installation.
During the installation in the seal groove, the seal groove is to be
vented between the seal ring and the groove wall by means of a
thin object. See to a correct fit of the seals.
With modified design of the seat seal 15.1, use the
assembly tool to install the seat seal (see page 16).
d. Insert the seat seal (3) into the lower valve shaft (6).
Use the APV assembly tool (see 11.) to insert the seat seal.
Provide the seat seal with a thin layer of grease before its installation.
When installed manually, vent the seal groove between the seal and
the groove wall by means of a thin object.
e. Control the actuator with compressed air.
f. Push the upper valve shaft (7) through the yoke (12) until it stops.
g. Place the actuator with yoke and upper valve shaft in the
upper valve housing (2 / 2.1). Fix the yoke flange at the valve
housing by means of the hexagon screws (14).
h. Shut off the compressed air and remove the compressed air supply.
i. Push in the lower valve shaft (3) through the upper valve shaft (7)
until it stops. Place the centering disk (25) and tighten the
safety nut (26).
For this purpose, hold against the centering disk.
Tightening torque 40 Nm.
Tighten the operating cam.
j. Slightly grease the lower housing seal (3) and insert it into the
groove of the valve housing (1).
fig. for 10.V.a.
UK