DeZurik APCO CVS-250A Instrukcja obsługi - Strona 15
Przeglądaj online lub pobierz pdf Instrukcja obsługi dla Jednostka sterująca DeZurik APCO CVS-250A. DeZurik APCO CVS-250A 16 stron. Swing check valves
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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.
October 2018
APCO CVS-250/250A Swing Check Valves
Possible Cause
Packing is worn. Packing is not
tight.
Foreign matter caught between
disc and seat.
Disc seat is worn or damaged.
Loose flange bolting.
Blown flange gasket.
Misalignment or damage to field
piping and supports.
Damaged flange face/s or
improper flange connections.
Object is wedged between seat
and disc.
Packing Gland is too tight
Page 15
DeZURIK
Corrective Action
Replace Packing. Adjust
packing.
Fully open valve to remove
object.
Repair disc seat or replace
valve.
Tighten flange bolting.
Replace flange gasket.
Adjust misalignment or repair
piping or supports.
Repair flange, replace valve
body or adjust flange
connections.
Fully open valve to remove
object.
Loosen packing gland fasteners.
Packing may need to be
replaced if leakage occurs.
D12003