1. Closed position On the closed position, the ball is tightly pressed against the seat by the mechanical wedging action of the stem
	2. Opening As the handwheel is turned counter-clockwise, as flat, sloping surface on the bottom of the rising stem causes the ball to till away from the seat
	3. Rotating As the stem continues to rise, the interaction of the stem guide and the precision spiral part at the stem causes the ball to begin its friction-free rotation.
	4. Opened position In the full open position, the stem has raised to its limit and the ball is positioned for straight through flow.
	5. Closing To close the valve, the Hand wheel is turned in Clockwise direction. The stem begins to lower and the ball begins to rotate
	6. Rotating (2) Continuous turning of the handwheel causes the precision spiral part at the stem to act against stem guide, rotating the ball 90 degrees
	7. Sealing Nearing the end of the closing cycle, the ball has rotated full 90 degrees without touching the seat
	8. Closed position (2) Final turns of the handwheel cause an angled flat surface on the lower stem to mechanically wedge the ball tightly against the seat.