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APV_DE3_UK-7_082017.indd
UK
Double Seat Valve
DELTA DE3
Instruction manual: UK - rev. 7
APV
piston rod
main cylinder
signal ring
piston seal
signal ring
quadring
piston
cover
quadring
12. Service Instructions
12.3. Maintenance of main cylinder
Dismantle the actuator, main cylinder (10) and spring cylinder (8)
from the valve insert as described in 12.2 1.-7.
12.3.1. Disassembly of main cylinder and dismantling of seals
1.
Remove the fastening screws (14). Remove the main cylinder (10)
from the spring cylinder (8).
2.
Press the piston rod out of the main cylinder. Remove the cover and
the piston with piston rod.
3.
Draw the piston rod out of the piston.
4.
Remove the quadring in the piston and in the main cylinder.
5.
Remove the piston seal.
6.
Clean the main cylinder, cover, piston rod and piston.
12.3.2. Installation of seals and assembly of main cylinder
Slightly grease the quadrings and the piston seal.
Use appropriate pneumatic grease.
- Recommendation for actuator (main cylinder):
APV pneumatic grease:
(25 ml tube - ref.-No. 000 70-01-008/93; H164725)
7.
Insert the quadrings and the piston seal.
8.
Assembly to be undertaken in reverse order to the procedure
described in 12.3.1.