A Needle Valve will work somewhat in controlling the speed of an air cylinder. It is not your best option.

 A Needle Valve controls the  flow of air both into and out of the air cylinder. The compressed air flows through the needle at the same speed regardless of the direction of air flow. And therein lies the problem.

This means that in order to get the cylinder speed slowed to your desired cycle rate, in using the Needle Valve you have limited the inrush of compressed air into the cylinder too.

More products of valves

Ball Valves

Check Valves

Gate Valves

Butterfly Valves

Globe Valves