SPX FLOW APV DELTA DE3, Инструкция по эксплуатации, Страница: 28 / 54

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APV_DE3_UK-7_082017.indd
UK
Double Seat Valve
DELTA DE3
Instruction manual: UK - rev. 7
APV
Failure Remedy
Leakage at upper housing flange Replace upper shaft seal (24, 25).
Leakage at drain pipe Remove the drain pipe (1) to verify the leakage.
Leakage at the outside of the lower valve shaft Replace lower shaft seal (24, 25).
Valve closed and pressure in upper housing
Leakage from the leakage chamber
of the lower valve shaft
Replace upper seat seal (28).
Valve closed and pressure in lower housing
Remove spray connection.
Leakage from the leakage chamber
of the lower valve shaft
Replace lower seat seal (28).
Valve open
Leakage from the leakage chamber
of the lower valve shaft
Replace middle seal (28).
When damaged seals are changed, generally all seals should be replaced.
For valve service actions SPX FLOW supplies complete seal kits
(see spare parts lists).
!
16. Detection of seal damage