DeZurik APCO CVS-EDV 사용 설명서 - 페이지 17
{카테고리_이름} DeZurik APCO CVS-EDV에 대한 사용 설명서을 온라인으로 검색하거나 PDF를 다운로드하세요. DeZurik APCO CVS-EDV 18 페이지. Swing check valves
페이지 인쇄
Table 1 - Continued
Lever & Weight, Lever & Spring, and Cylinder Parts
Item
Number
B81
Y-Connector Pin
B82
Y-Connector Pin Retaining Ring
B83
Spring Cylinder
B84
Spring Cylinder Mount Bolt
B85
Lever arm fabrication 16-30"
B86
Spring 16-30"
B87
Spring Lever Arm Ret. Screw 16-30"
B88
Cushion Lever
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.
February 2016
APCO CVS-EDV Swing Check Valves
Description
Possible Cause
Packing is loose.
Packing is worn.
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 17
DeZURIK
Corrective Action
Tighten gland nuts only until the
leak stops.
Replace 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.
D12042