20
APV_SW4_UK-4_082017.indd
UK
Single seat and change-over valve
DELTA SW4
Instruction manual: UK - rev.4
APV
13. Service Instructions for Change-over valve
13.3. Installation of seals and assembly of valve
1.
Insert the guide bushing into the yoke. Then place the shaft seal
and press in the slightly greased seat seal.
See to the correct installing position.
2.
nstall the yoke at the actuator.
3.
Insert the seat seal in the shaft. Use the APV assembly tool to
install the seat seal, see chapter 14. Grease the seat seal only
slightly before its installation. In case of manual installation, vent
the seal groove with a thin object between seal and groove wall.
4.
Slightly grease the housing seals and install them in the grooves
of the yoke and of the upper housing.
Fasten the upper housing at the yoke by means of the clamp.
Attention:
Valve design NO:
Control the valve with air.
5.
Slide the protective tube over the thread of the guide rod.
Slide the shaft through the upper housing, yoke and actuator.
Place the centering washer and tighten the safety nut.
Hold up the safety nut during this process.
Tightening torque 40 Nm.
6.
Attention:
Valve design NO:
Shut off compressed air.
7.
Install the adapter for the control unit on the actuator.
Apply a drop of a screw locker (e.g. type: Loctite semi-solid)
in the area of the threaded bore of the actuator screw.
Fasten actuator screw on the guide rod.
13.4. Installation of valve
1.
Fasten the control unit on the adapter.
2.
Connect compressed air supply.
3. Valve design NC:
Control actuator with air.
Do not touch movable valve parts!
Risk of injury by sudden valve operation!
4.
Place the valve insert carefully into the lower housing and
fasten the lower clamp.
The housing seals must not be damaged during the installation.
5.
Valve design NC:
Shut off compressed air.
6.
Check the basic adjustment of the valve position indicator
if
necessary.
- The shift points can be adjusted by turning the positioning screw
in the control unit.
fig. 13.3.1.
guide bushing
shaft seal
seat seal
housing seal
yoke
shaft
seat seal
guide rod
protective tube