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
9.5
Valve disassembly and re--assembly
See manual of maintenance reference:
Reference
Manual of maintenance
DANAïS MT II
R355--70037
DANAÏS 150
8460.815
DANAÏS TBT II flanged
R355--70036
DANAÏS TBT II BW
R355--70032
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
Actuator on safe position
-- Open the valve, line without fluid or flow, remove the particle
-- inspect seal/disc
-- replace seal/disc
Broken body
Defect due to water hammer
Search for the reasons.
Replace / Repair the valve
Broken or warped disc
Defect due to water hammer
Search the reasons. Replace / Repair the valve
Damaged disc, corroded disc
Repair the valve -- Replacement of seal
Broken shaft, twisted shaft
Analyse the defect / research of causes / replace shaft
Wrong flange gasket
Check type and dimensions
Wrong flanging
Check type and flange bolting torque
Wrong flanging size
Follow instructions given in KSB technical leaflet
Wrong face to face,
non parallel flanges
Flanging has to be modified in accordance with KSB technical leaflet
requirements.
Flow conditions
Wrong operating conditions
Check the technical offer versus service conditions
Damaged actuator
Check sizing versus operating conditions (see KSB)
Defective sealing
Search the reasons
Tighten or replace sealing packing
Replace O--rings
Defective sealing
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.
Legal information/Copyright
-- Original operating manual -- all right reserved
Contents provided herein must neither be processed without KSB’express written consent
Subject to technical modification without prior notice.
12.03.2019
8450.810/15
--EN
