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Stop Check Valve Operation
AUTO
In the “Auto Position”, the stop valve is
operating as a check valve, allowing ow
in the directions of the arrows.
To set the valve to the automatic posi-
tion, fully close the valve, and turn the
stem out as indicated by the chart below.
CLOSED
In the manually “Closed Postion”, the
stop check is operating as a conventional
stop valve, not allowing ow in either
direction.
OPEN
In the manually ” Open Position”, with
the valve stem fully back seated, the
valve disc is lifted slightly, allowing ow
in either direction.
Valve Size 1.5” 2” 2.5” 3” 4” 5” 6” 8”
Number of Turns Open 2 2.25 2.75 3.25 4.5 3.75 5.75 7.75
(from closed position)