Running two festos to the same piston

Just looked through the manual, but didn’t see a rule that specifically allows or disallows it. Are we permitted to run two festos (through a “T”) to the same piston, and fire them at the same time? Our goal would be to increase the volume of air (and thus the speed of the piston stroke), while obeying the working pressure rules.

Thanks.

Nope, R90 this year and something similar for every year I can remember disallows this. What are you trying to accomplish that needs the extra speed? Look at available solenoid valves, not all valves with the same size fitting flow the same volume of air at the same rate.