Cameron WKM MA Installation, Operation And Maintenance Manual - Page 10

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Operation

Manually Operated

The WKM

DynaCentric

MA 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 smaller sized WKM

DynaCentric

Performance Butterfly Valves (3" - 6" Class 150

and 300, 3" and 4" Class 600) have flats on the

stem. The larger valve sizes 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 perpendicular,

the valve is closed.

In all cases, when the valve is closed, the handle

is perpendicular to the run of the pipe (Figure 13)

and when the valve is open, the handle is parallel

to the pipe (Figure 14).

Maximum recommended pressure differential for

handle operated valves:

3" .............. 400 psi

4" .............. 300 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 15).

Counter-clockwise rotation of the handwheel

opens the valve; clockwise rotation closes the

valve.

Figure 14

Installation, Operation and Maintenance Manual

MA High

Figure 13

Figure 15

D I S T R I B U T E D V A L V E S

WKM-MA-HPBV-IOM