Cameron WKM MB - Operation; Manually Operated; Worm Gear Operated

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TC-003001-10/ Rev 2
OPERATION
MANUALLY OPERATED
The WKM DynaCentric MB High Performance Butterfly Valve operates from fully open
to fully closed by a 90° turn of the handle.
Visual "OPEN - CLOSED" indicators on the stop plate and handle enable the valve's
position to be determined at a glance.
The 3" through 6" WKM DynaCentric MB High Performance Butterfly Valves have
flatted stems. The larger valves have a single square key.
Both stem flats and keyway indicate valve position. When they are in line with the
flow stream, the valve is open. When they are perpendicular, the valve is closed.
In all cases, when the valve is closed, the handle is perpendicular to the run of the
pipe (Figure 16) and when the valve is open, the handle is parallel to the pipe (Figure
17).
Maximum recommended pressure differential for handle operated valves:
2 1/2" ......... 450 psi
3" .............. 400 psi
4" .............. 300 psi
5" .............. 200 psi
6" .............. 150 psi
8" .............. 50 psi
WORM GEAR OPERATED
Worm gear operators, available as standard equipment on all valves 8" and larger, which are not power actuated,
have an arrow on top of the operator that indicates the "OPEN - CLOSED" position of the disc (Figure 18). Counter-
clockwise rotation of the handwheel opens the valve; clockwise rotation closes the valve.
Figure 16
Figure 17
Figure 18