KSB BOA-SuperCompact - 9 Trouble-Shooting

9 Trouble-shooting
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9 Trouble-shooting
WARNING
Improper remedial work on the valve
Risk of injury!
▷ For any work performed in order to remedy faults on the valve observe the
relevant information given in this operating manual and/or the product
literature provided by the accessories manufacturers.
If problems occur that are not described in the following table, consultation with the
KSB customer service is required.
Table45: Trouble-shooting
Problem Possible cause Remedy
Leakage at the seat/disc interface
(BOA-SuperCompact, BOA-Compact
or BOA-CompactEKB)
Rework not possible.
Replace valve.
Leakage at the seat/disc interface
BOA-H, BOA-R and BOA-W
1. Dismantle bonnet/cover bolting
902/920/901.
2. Rework the seating faces of valve
disc and body using a suitable re-
seating tool.
3. Continue re-seating until the
seating faces exhibit a consistently
smooth and even ring.
Leakage at the seat/disc interface
BOA-H with PTFE valve disc
1. Dismantle bonnet/cover bolting
902/920/901.
2. Replace the seal ring at valve disc
350 (BOA-H).
Leakage at the bonnet/body joint or
cover/body joint (BOA-H, BOA-R
and BOA-S)
Unevenly tightened bonnet/cover
bolts
1. Undo bonnet/cover bolting 902/920
or 901.
2. Replace joint ring 411.
3. Re-tighten bonnet/cover bolting
902/920 or 901 as specified in the
manual. (ðSection8.2.4.1,Page45)
Defective bonnet/cover gasket 1. Dismantle bonnet/cover bolting
902/920/901.
2. Clean sealing surfaces.
3. Replace joint ring 411.
The tightening torques
(ðSection8.2.4.1,Page45) must be
observed.