Pneumatic Solenoids/Cylinders

[2010FRC0476]

1. Can we supply air to activate a pneumatic cylinder using one of the supplied 3-way ball valves and a 90-degree pneumatic actuator? We don't see anything in the rules that specifically says we have to activate a pneumatic cylinder with air going through a solenoid valve.
2. Assuming the answer to #1 is 'no' and we have to supply air to the cylinder through a solenoid valve of 0.32 Cv or less, can we exhaust the air from a pneumatic cylinder through one of the 3-way ball valves?
3. Assuming the answer to #2 is no, can we use two solenoid valves, each with a Cv of 0.32 or less, in parallel to activate and exhaust a single pneumatic cylinder?

[GDC]

1 - Ball valves are not listed as one of the explicitly allowed pneumatic items in Rule <R72>. As such, they are prohibited by Rule <R71>.

2 - No - Ball valves are prohibited. See #1 above.

3 - There is no rule that would prohibit this.