[David M Johnson]

Flow controls have a restricted flow path and a "better" flow path. Technically, both are restricted... but one direction is adjustable by means of the adjustment knob. The can be used to meter the exhaust flow out of the cylinder or to meter the supply flow into the cylinder. Usually, the meter out direction is selected. They can be placed nearest the valves or at the cylinder... but there may be a difference. If placed at the valve, the flow control will meter all the air in the tubing as well as the volume of the cylinder. If the tubing volume is substantial, the cylinder may reach end of stroke without any slowing at all. If used in a vertical application, I would suggest trying meter in for a slow extension. Flow controls are very sensitive and can provide slow extensions if used properly... but will, in all cases, serve to slow the cylinder (acting as a resistance to flow). Observe the arrow symbol on the side of the component --- larger arrow points to the better flow path.