Trouble Shooting; Spare Parts Lists - SPX FLOW APV DELTA SD4 Series Instruction Manual

APV
APV_SD4_ATEX_UK-0_122018.indd
Failure
Valve is untight, leakage via leakage valves
Leakage at leakage valve cylinder
Leakage between housing and yoke flange
Actuator
Air escapes at the actuator rod.
Actuator does not work (air escapes permanently from
the venting plug).
Valve position indication
No feedback.
Double seal valve
DELTA SD4-ATEX
Instruction Manual: UK - rev. 0
16. Trouble Shooting
Remedy
Replace seat seal.
Check line pressure:
Admissible line pressure see chapter 9.
Replace o-rings.
see RN 01.054.67
Check cleaning liquid supply.
Replace housing seals.
Replace complete seal screw for actuator.
Replace the complete actuator.
Carry out fine adjustment.
17. Spares Parts Lists
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
UK
26