APV SPX DELTA DKR2, Operating Manual

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12. Detection of Seal Damage
Double-Seat Ball Valve with Cleaning Connection
DELTA DKR 2
Operating Manual : Rev. 7
UK
Failure Remedy
Valve is closed and controlled with air
Leakage at upper and lower housing flange replace seal (8).
Leakage from the leakage bore replace seals (8, 9, 7).
Valve is closed and leakage during cleaning via the spray connection
Leakage at spray connection replace O-rings (12).
Leakage at shaft bearing replace seals (4, 5, 6).
Valve is open
Leakage at the leakage bore replace seals (8, 9, 7).
If damaged seals are replaced, generally all seals should be
changed. Complete seal kits for the valve service are available
(see spare parts lists).
13. Spare Parts Lists
(see annex)