[FrankJ]

Originally Posted by Al Skierkiewicz

Frank,
Most of the valves I see these days are pilot air operated valves.

Sorry I was a little imprecise. I didn't mean to include intergral solenoid piloted valves in the larger class of pilot operated valves. Thankfully they are legal. Otherwise the PCM would be way under powered.

Q715 Q. Under rule R77 C, we have in past seasons used an air operated pneumatic valve to control our air cylinder. The valve meets the 1/8 NPT rules and at events the inspector only required that we use the specified tubing between the cylinder and pneumatic valve. To paraphrase, under R77C are rules for air operated pneumatic valves the same as solenoid valves. The part number of the valve, McMasterCarr #6124K40
FRC3451 on 2016-01-29
A. R77-C specifically allows solenoid valves (this includes both direct operated solenoid valves and the more common solenoid piloted valves). Fully air-operated valves are not allowed per R77. While we will not use this forum to definitively rule on any part, we recommend double checking the documentation for your part to determine legality.