Cameron WKM MA Installation, Operation And Maintenance Manual - Page 6
Browse online or download pdf Installation, Operation And Maintenance Manual for Control Unit Cameron WKM MA. Cameron WKM MA 12 pages. Dynacentric high performance butterfly valve
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Scope
The WKM DynaCentric MA High Performance
Butterfly Valve offers all the benefits of a wafer
valve -smaller size, lower price, lighter weight and
throttling capabilities - and the high performance
characteristics of ball and gate valves. Because
of their quarter turn operation, they are easily
and economically adapted to power actuation.
The WKM DynaCentric MA High Performance
Butterfly Valve is available in 3" - 12" 150, 300
and 600 pressure classes and 14" - 24" 150
and 300 pressure classes, and 30" 150.
The valve is available in both flangeless wafer
style and single flanged tapped lug style bodies.
Stem packing is adjustable. Seats are easily
replaced in the field.
Storage
After assembly and test, WKM DynaCentric MA
High Performance Butterfly Valves are placed in the
closed position. Carbon steel valve internals
are coated with rust preventative and painted on
the external surfaces. Flange protection is
provided for all valves. Valves should be stored
in a clean, dry location. Outdoor storage is
permissible, but should be off the ground and
protected from the elements. For long term
storage, contact your Cameron representative.
Figure 4
Preferred Position - Seat Upstream
Installation, Operation and Maintenance Manual
Installation
Although WKM
Butterfly Valves have Bi-directional sealing
capabilities and will operate in any position, the
following positions are generally recommended for
certain applications.
Flow Direction -
Normally the preferred position is seat upstream
(Figure 4) where the seat retainer provides
protection for the seat against erosion due to line
flow. This position also reduces operating torque
and provides better throttling characteristics.
For handle operated valves or valves in fail-
closed service, the seat should be downstream
(Figure 5) with the stem side of the disc facing
the flow. This position results in positive closing
torque with increasing pressure and reduces the
hazard associated with handle operation.
Stem Position -
WKM
DynaCentric
Valves perform equally well with the stem in the
vertical or horizontal position. However, the stem
horizontal position is always preferred. When the
lading contains solids, which can build up over
long periods of closure, it is particularly important
that this position be used. A flushing action of the
flow media during opening and closing cycles
cleans sediment from the bottom of the line by a
jetting action. When such action is desired, the
valve should be installed seat upstream (flow from
the seat side of the valve) with the integral stop
pin in the vertical up position. (Figure 6).
Figure 5
Seat Downstream (Fail Close)
4
D I S T R I B U T E D V A L V E S
DynaCentric
MA High Performance
MA High Performance Butterfly
Figure 6
Stem Horizontal
WKM-MA-HPBV-IOM