Cameron WKM MA Manual de instalación, uso y mantenimiento - Página 7
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End-of-Line Service
Threaded style lug valves are recommended
for end-of-line or equipment isolation service.
The WKM
DynaCentric
MA High Performance
Butterfly Valve can handle flow from either
direction in end-of-line service.
To prevent unintentional removal of the seat
retainer with pressure on the valve, it is
recommended that the valve be installed with
the seat retainer against the upstream flange
if possible.
Disc/Pipe Clearance
Before beginning installation, note the following:
Disc/pipe clearance should be checked before
beginning installation to avoid the possibility of
scraping on the disc edge on the pipe I.D. and
damaging the sealing surface.
Minimum pipe I.D. required for disc swing clearance:
Class 150 valves - Schedule 40 pipe or equivalent
Class 300 valves - Schedule XS pipe or equivalent
Class 600 valves - Schedule 120 pipe or equivalent
Consult Table 1 for required flange modifications for
other pipe schedules.
Minimum Disc/Pipe
Swing Clearance
X
Figure 7 - Disc / Pipe Clearance
Installation, Operation and Maintenance Manual
Seat Retainer
Valve Size
and Class
ØD
30°
5
D I S T R I B U T E D V A L V E S
Schd Schd
40
XS
(extra
strong)
3" - 150
X
X
3" - 300
X
X
3" - 600
X
X
4" - 150
X
X
4" - 300
X
X
4" - 600
X
X
6" - 150
X
X
6" - 300
X
X
6" - 600
X
X
8" - 150
X
8" - 300
X
X
8" - 600
X
X
10" - 150
X
10" - 300
X
X
10" - 600
X
X
12" - 150
X
12" - 300
X
X
12" - 600
X
X
14" - 150
X
14" - 300
X
X
16" - 150
X
16" - 300
X
X
18" - 150
X
18" - 300
X
X
20" - 150
X
24" - 150
X
24" - 300
X
X
30" - 150
X
X
Table 1 - Disc Clearance
Schd
Diameter
120
(in.)
X
2.75
X
2.75
X
2.75
3.85
3.85
X
3.65
5.90
5.90
X
5.50
7.90
7.90
X
7.40
10.00
9.80
X
9.06
11.90
11.75
X
11.75
13.06
13.00
15.00
14.68
16.87
16.50
18.81
22.62
22.06
X
28.02
WKM-MA-HPBV-IOM