DeZurik APCO CVS-250A Manuale di istruzioni - Pagina 15

Sfoglia online o scarica il pdf Manuale di istruzioni per Unità di controllo DeZurik APCO CVS-250A. DeZurik APCO CVS-250A 16. 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.

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