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APV_SD4_ATEX_UK-0_122018.indd
UK
Double seal valve
DELTA SD4-ATEX
Instruction Manual: UK - rev. 0
APV
16. TroubleShooting
17. SparesPartsLists
The reference numbers of the spare parts for the different
valve designs and sizes are included in the attached
spare parts drawings with corresponding lists.
Please indicate the following data
to place an order for spare parts:
- number of required parts
- reference number
- designation
Failure Remedy
Valve is untight, leakage via leakage valves
Replace seat seal.
Check line pressure:
Admissible line pressure see chapter 9.
Leakage at leakage valve cylinder
Replace o-rings.
see RN 01.054.67
Check cleaning liquid supply.
Leakage between housing and yoke flange Replace housing seals.
Actuator
Air escapes at the actuator rod. Replace complete seal screw for actuator.
Actuator does not work (air escapes permanently from
the venting plug).
Replace the complete actuator.
Valvepositionindication
No feedback. Carry out fine adjustment.