Emerson VSM Air Compressor User Manual


 
48
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)