DeZurik APCO CVS-6000 Kurulum, Kullanım ve Bakım Kılavuzu - Sayfa 5
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APCO CVS-6000 Convertible Swing Check Valves
Maintenance
Disassembly Procedure
See Figure 1 and Figure 2 for part identification.
These valves may open or close, swinging the counterweight/spring loaded
arm without warning due to flow changes from pumps starting and
stopping. Servicing or working around these valves while the pipeline is
under pressure can cause personal injury or equipment damage.
Workers must be cautious when working around these valves.
Relieve pipeline pressure and lockout the pumps before servicing the valve.
1. Relieve the pressure in the pipeline.
2. If it is necessary to remove valve from pipeline, set valve standing on its inlet flange.
3. CVS-6000-CLW valves only: Support counterweight (29), then unscrew counterweight set
screw (36) and remove counterweight assembly (44).
CVS-6000-CLS valves only: Disconnect spring (59) from spring lever arm (44).
4. Loosen nut (56) holding counterweight arm assembly to pivot shaft (13) and remove
counterweight arm assembly.
5. Remove cover (2) by unscrewing cover bolts (4).
6. Unscrew disc arm set screws (14).
7. Remove pivot shaft cover (15) and seal retainer (37) at both ends of the shaft.
8. Pull pivot shaft from the right side of the valve (facing inlet).
9. Remove bushing (12), key (33), and seals (17) & (18).
10. Remove disc pin retaining rings (41) and pull out disc pins (8).
11. Pull out disc arm (9).
12. Remove disc seat (6) and seat retaining ring (31) by unscrewing all screws (32).
13. Unscrew the seat retaining screws (40) located inside the body seat ring (5).
14. Evenly pry the body seat ring (5) out of the body (1).
December 2012
Page 5
DeZURIK
D12009