Off-board relief question

[robert.hatchett]

With the recent posting of the inspection checklist, does anyone else have a problem with the (2) relief valve requirement?

[dtengineering]

I'm not sure that the requirement for the relief valve wasn't in the rules last year. Note that this is only for teams using the compressor to pre-pressurize the robot before the match, not teams that have the compressor on board the robot.

What caught my attention, however, was this:

____ High-Pressure Regulator - must include an on-robot 120PSI max setting) regulator and visible gauge immediately downstream of the compressor and 125PSI relief valve.


This is definitely different from previous years and, as far as I can tell, is not required in the rule book. Likely a typo and should refer to the 120psi pressure switch, but I would hate to see an inspector asking why we only have one (60psi) regulator on the robot.

Probably needs a Q&A if it isn't revised shortly.

Thanks for pointing out that the inspection checklist has been published... or at least Rev. A has!

Jason

[Russ Beavis]

http://forums.usfirst.org/showthread.php?t=11773

I've been vindicated (regarding 2 safety relief valves) ;)

Not so lucky on part 2 though -

Regarding the High-Pressure Regulator question - the checklist is wrong and needs to be fixed. Thanks for the catch! The same error actually occurs for the Working-Pressure Regulator checklist item. For starters, there isn't actually any need for a 120PSI regulator since it's the switch and relief valve that "regulate" to 120PSI.

I don't have a good excuse for the error. Whoops...

Rule R73 doesn't require that any regulators be present on the robot. Rule R75-D suggests that the Norgren 60PSI regulator may be off-robot and further requires that, if the Norgren regulator is off-robot, then the on-robot accumulators must be limited to 60PSI.

I'll update the checklist (I'm sure that this won't be the first time).

Sorry for any confusion.

Russ