DeZurik APCO CVS-6000 Handbuch für Installation, Betrieb und Wartung - Seite 10
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DeZURIK
APCO CVS-6000 Convertible Swing Check Valves
Troubleshooting
Condition
Shaft seal leaks.
Valve leaks excessively from
one side of the disc to the other.
Valve leaks at flange joint.
Valve does not fully close.
D12009
Possible Cause
Seal is worn.
Foreign matter caught between
disc and seat.
Disc seat is worn or damaged.
Loose flange bolting.
Blown flange gasket.
Miss-alignment or damage to
field piping and supports.
Damaged flange face/s or
improper flange connections.
Object is wedged between seat
and disc.
Page 10
Corrective Action
Replace seal.
Fully open valve to remove
object.
Replace disc seat.
Tighten flange bolting.
Replace flange gasket.
Adjust miss-alignment or repair
piping or supports.
Repair flange, replace valve
body or adjust flange
connections.
Fully open valve to remove
object.
December 2012