SPX APV DELTA MS4, Operating Manual, Page: 18 / 51

Diaphragm valve with fan support
DELTA MS4
Operating Manual rev. 0
DELTA MS4-UK0.qxp / 05.2008
UK
13
9. Service Instructions
9.3. Installation of seals and assembly of valve
All seals must be provided with a thin layer of grease
before their installation.
1 . Insert the guide bush (11) and o-ring (13) in the yoke (9) .
Insert the o-ring (15) in the groove of the yoke.
Fasten the yoke (9) at the actuator (17) .
2. Install the seat seal (2) in the lower valve shaft (3) .
(see Service Instructions 11.)
3. Install the o-ring (16) in the fan (6) .
Place diaphragm and fan on the upper shaft.
4. Wind the protective pipe over the thread of the guide rod.
5. Pass the guide rod through the upper shaft with diaphragm and fan
until it stops on the lower shaft. Insert the diaphragm support into
the fan.
! Toothing of fan and diaphragm support must interlock.
6. Insert the pre-assembled lower shaft with guide rod, diaphragm,
fan, upper shaft and diaphragm support through the yoke (9) and
actuator (17).
- The upper shaft must be guided through the guide bush into the
yoke in
smooth-running manner. In case of mechanical stiffness,
check the right fit of the guide bush.
7. Design with control unit and valve position indication
Place the centering washer (21) . Apply a drop of a screw locker,
e.g. type Loctite, semi-solid, on the thread of the guide rod. Screw
on the hex. nut
(22) and fasten it with a tightening torque of
Md = 40 Nm . Hold up the centering washer during this process.
! Control Unit: Fasten the plastic actuator screw.
! Valve position indicator:
Fasten the metallic actuator screw.
yoke (9)
guide bush
(11)
o-ring (13)
diaphragm (5)
seat seal (2)
lower shaft (3)
guide rod (8)
fan (6)
o-ring (15)
o-ring (16)
upper shaft (4)
diaphragm support (7)