22
APV_SD4_ATEX_UK-0_122018.indd
UK
Double seal valve
DELTA SD4-ATEX
Instruction Manual: UK - rev. 0
APV
13. ServiceInstructions-Actuator
Sparepartslist:RN01.054.86
13.1. Maintenanceofactuator(fig.13.1.)
1. Remove the air hoses from the actuator.
2. Unscrew the two seal screws with a spanner SW30
while holding up the actuator with a strap wrench.
13.2. InstallationofsealsandAssemblyofActuator
1. Install the greased o-rings and v-seals in the seal screws (fig. 13.2).
See to the correct installing direction of the v-seal.
2. Slide the seal screws over the piston rod at both sides of the
actuator and tighten them.
3. Fasten the yoke on the actuator.
Attention: Considertherequiredvalvedesign
NCorNOduringtheinstallationoftheyoke.
NC= normallyclosed/air-to-raise,spring-to-lower
NO= normallyopen/air-to-lower,spring-to-raise
4. Fasten the air hoses.
13.3. Actuatorwithvalvepositionindicator
Assemblyofholder(fig.13.3.)
1. Install the actuator screw on the actuator.
2. Provide the housing with the o-ring.
3. Fasten the housing by means of the 4 hex. screws M8
on the actuator.
4. Release the screws at the proximity switch holder and insert
the corresponding proximity switches. Then fasten the screws.
5. Place the actuator in one limit position.
6. Place the corresponding proximity switch in the corresponding
position. Release the positioning screw and move the holder until
the corresponding signal is indicated. Then continue the movement
by 2 to 3 mm to secure indication.
Fasten the positioning screw.
7. Place the actuator in the other limit position and carry out
positioning of the second proximity switch.
piston rod
seal screw
actuator
air connection
v-seal
o-ring
seal screw
prox. switch support
screw
guide rod
piston rod - actuator
actuator screw
housing
positioning screw
o-ring
hex. screw M8
centering washer
fig. 13.2.
fig. 13.3.
fig. 13.1.
v-seal
o-ring
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