Troubleshooting General; Faults & Remedies - KSB DANAIS 150 Operating Instructions Manual

9.5 Valve disassembly and re- -assembly
See manual of maintenance reference:
Reference
DANAïS MT II
DANAÏS 150
DANAÏS TBT II flanged
DANAÏS TBT II BW
10 Troubleshooting
10.1 General
All repair and service work must be carried out by qualified personnel using suitable tools and genuine spare parts.
The previous safety instructions must be observed.
10.2 Faults & Remedies
Cover or extension leakage (between the shaft and the flange
Downstream/Upstream leakage
Shaft leakage
Flange leakage
Over torque
No opening
No closing
Hard point
Vibration / Fluttering
Foreign particles in the valve
Broken body
Broken or warped disc
Damaged disc, corroded disc
Broken shaft, twisted shaft
Wrong flange gasket
Wrong flanging
Wrong flanging size
Wrong face to face,
non parallel flanges
Flow conditions
Wrong operating conditions
Damaged actuator
Defective sealing
Defective sealing
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Contents provided herein must neither be processed without KSB'express written consent
Subject to technical modification without prior notice.
KSB S.A.S.
4, allée des Barbanniers  92635 Gennevilliers Cedex (France)
Tél. : +33 1 41 47 75 00
www.ksb.com
DANAÏS 150, DANAÏS MT II, and DANAÏS TBT II
Manual of maintenance
R355--70037
8460.815
R355--70036
R355--70032
Actuator on safe position
-- Open the valve, line without fluid or flow, remove the particle
-- inspect seal/disc
-- replace seal/disc
Defect due to water hammer
Search for the reasons.
Replace / Repair the valve
Defect due to water hammer
Search the reasons. Replace / Repair the valve
Repair the valve -- Replacement of seal
Analyse the defect / research of causes / replace shaft
Check type and dimensions
Check type and flange bolting torque
Follow instructions given in KSB technical leaflet
Flanging has to be modified in accordance with KSB technical leaflet
requirements.
Check the technical offer versus service conditions
Check sizing versus operating conditions (see KSB)
Search the reasons
Tighten or replace sealing packing
Replace O--rings
Actuator on safe position
Open the valve line without fluid or flow ( 0 ° C < temperature < 60 ° C)
Inspect metallic seals, sealing area
Replace metallic seals, repair sealing area.