Dikkan DN15 - Troubleshooting; Warranty

Doc. No: FRM.65 Rev. No: 00 Rev. Date: 01.06.2015
13
13. TROUBLESHOOTING
Be sure to observe the safety instructions during troubleshooting.
Fault
Possible Cause
Corrective Action
Valve leaking around
stem and gland
T-Bolts loose
Tighten T-Bolts
Damaged or worn gland packing
Refer to the "8.1 Replace the Gland
Packing" sections of this manual
Damaged stem
Replace stem
Valve leaking around
bonnet
Body-Bonnet bolts loose
Tighten body-bonnet bolts
Damaged bonnet gasket
Refer to the "8.2 Replace the Gasket"
sections of this manual
Valve leaking around pipe
connections
Flange bolts loose
Tighten flange bolts
Damaged flange gasket
Replace flange gasket
Valve hard operate
T-Bolts too tight or tightened unevenly
Loosen T-Bolts, re-tighten T-Bolts evenly
If the valve has not been operated over for a
long time, may stem is stuck
Lubricate stem threads with grease
Valve does not pass flow
Check flow arrow direction on valve body
The arrow on the valve body must be in the
same direction of the liquid flow
Flange covers not removed
Remove flange covers
The valves and pipeline must be protected
against freezing media
Warm up pipeline system and use valve
jacket
Valve seat leaking
Dirt or debris between sealing surfaces
Open valve to flush or clean sealing
surfaces
Damaged disc seat or body seat
Refer to the "8.3 Metal to Metal Sealing"
sections of this manual
Low flow rate
Blockage in the pipeline system
Check pipeline system
Breaking the valve parts
Damage to the parts bearing pressure
because of water hammer
To avoid water hammer, where necessary
in the pipeline system, place water hammer
protective equipment
14. WARRANTY
Warranty Period: 18 Months
The warranty shall not cover maintenance work, installation of external parts. When unoriginal parts are used for
replacement, warrants and liabilities become invalid.