R07-100-RNEA regulator outlet pressure

[JesseK]

I'm not asking that every team be forced into lower storage, but rather, the GDC allows teams to be able to make the choice by providing an alternative pressure switch part #. It may put more pressure on RI's though (no pun intended).

While I agree the relief valve is supposed to be set to 125 psi, every inspection I've ever been apart of has led to the relief valve being set to 120-122 psi so that the max pressure caps out at under 124psi with the compressor running. Maybe that's just how this region does it (we usually get the same RI in DC since we inspect so early)? Champs has never commented on it because it was already set lower than required.

We certainly would have made the tradeoff a couple of years ago if it meant having a good rotary.

[Jon Stratis]

Maybe instead of playing with the storage pressure rules, we could take a rule staring from the rulebook and suggest it be adapted for other items. R66 D states "Solenoid valves that are rated for a maximum working pressure that is less than 125 psi rating mandated above are permitted, however if employed, an additional pressure relief valve must be added to the low pressure side of the main regulator. The additional relief valve must be set to a lower pressure than the maximum pressure rating for the solenoid valve,"

Why limit that just to solenoid valves (other than the fact the rules have that limit imposed)?. Do some research. Find the difference in available selection for the rotary pneumatic actuators you describe, sorted into "legal" and "illegal", and if you can, suggest that this rule be extended to include those actuators as well. The presence of an additional relief valve could very easily be argued to make these actuators safe for use, I would think, and if a team isn't using them then it won't affect them.

[Nate Laverdure]

These relief valves are not precision devices:
-- They have a specified repeatability of +/-20% of the setpoint
-- They don't reach full flow until the inlet pressure is approximately 120% of the setpoint
-- They'll reach equilibrium with a notional 1.05 CFM compressor flow rate at approximately 110% of the setpoint