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Vilter Stop/Check-Valve General Information
AUTO
In the “Auto Position”, the stop valve is operating as a check valve,
allowing flow in the directions of the arrows.
To set the valve to the automatic position, 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
convientional stop valve, not allowing flow in either direction.
OPEN
In the manually ” Open Position”, with the valve stem fully back seated,
the valve disc is lifted slightly, allowing flow in either direction.