20
APV_SD4_ATEX_UK-0_122018.indd
UK
Double seal valve
DELTA SD4-ATEX
Instruction Manual: UK - rev. 0
APV
11. ServiceInstructions
11.3. InstallationofsealsandAssemblyofvalve
1. Insert the guide bush into the yoke.
Afterwards, insert the shaft seal and press in
the slightly greased seat seal (see fig. 11.3.1.).
See to the correct installing position.
2. Install the yoke at the actuator.
3. Insert the seat seal into the shaft. Use the assembly tool
to install the lower seat seal (see chapter 15). Grease the
seat seal only slightly before its installation.
In case of manual installation, vent the seal groove with
a thin object between the seal and groove wall.
4. Install the protective tube via the thread of the guide rod.
Slide the shaft through the yoke and actuator. Place centering
washer and tighten the actuator screw on the guide rod.
Hold up the centering washer during this process.
Tighteningtorque40Nm.
5. Slightly grease the housing seal and place it in the groove
of the yoke.
6. Fasten the valve position indicator.
11.4. Installationofvalve
1. Connect compressed air supply.
2. ValvedesignNC: Control actuator with air.
Donottouchmovablevalveparts!
Riskofinjurybysuddenvalveoperation.
3. Place the valve insert carefully into the housing.
The housing seal must not be damaged during the installation.
Tighten the hexagon screws crosswise in the housing flange.
4. Valve design NC: Shut off compressed air.
5. Check the basic adjustment of the valve position indication
if necessary.
fig. 11.3.1.
guide bush
shaft seal
seat seal
housing seal
shaft
seat seal
guide rod
protective tube
yoke