The ball valve in the valve is in what state is open
The valve in the factory depends on the order of the switch before the core and the orientation of the handle, the valve is most clockwise, counterclockwise is open.
The switch of the ball valve is 90 degrees angle (except the three pass) and the slot is limited.
Therefore, the location of the stem can not directly determine the switch status of the ball valve, such as the handle has a switch sign, you can observe the mark near the slot, at this time the valve switch with the mark.
