19
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
13.1. Dismantling from the line system
1. Shut off line pressure and drain lines if possible.
2. Release connection between the upper housing globe and
the connected line.
3. Valve design NC: Control actuator with air.
Do not touch movable valve parts!
Risk of injury.
4. Remove the lower clamp.
5. Lift the valve insert together with the upper housing
off the lower housing.
6. Attention: Valve design NC:
Shut off compressed air and
remove compressed air supply.
7. Remove the control unit from the actuator.
13.2. Dismantling of product-wetted parts
1. Unscrew the actuator screw from the guide rod.
Dismantle adapter for control unit.
2. Attention: Valve design NO:
Control valve with compressed air.
3. Unscrew the safety nut while holding up the centering washer.
Remove the centering washer.
- Attention: Valve design NO:
Shut off valve with compressed air.
4. Take the shaft out of the actuator and remove the seat seals.
5. Detach the upper clamp and upper housing.
Remove the two housing seals.
6. Unscrew the yoke from the actuator.
7. Take off seat seals, shaft seal and guide bushing.
Service of actuator, see paragraph 12.1.
control unit
actuator screw
hex. nut
centering washer
CU adapter
shaft seal
guide bushing
shaft
actuator
lower housing
seat seal
seat seal
housing seal
housing seal
upper housing
yoke
upper clamp
lower clamp
Change-over valve
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