Viair 90 series compressor

[Mark McLeod]

Max intermittent pressure rating for the 90 series is 200psi.

120 psi maximum is what our robots are restricted to (by our properly set main regulator).

125 psi or greater is what the individual components have to be minimum rated for so we're sure they don't burst.
Our safety pressure relief valve vents excess pressure above 125psi.

The old compressors can exceed 125psi too.

[Mike Betts]

Originally Posted by Mark McLeod

Max intermittent pressure rating for the 90 series is 200psi...

Mark,

I agree that, from an engineer's and mentor's perspective, it should be legal but, in order to get a uniform ruling by all inspectors at all events, someone needs to ask the GDC if a max intermittent pressure rating is sufficient to qualify under <R66> (working pressure of at least 125psi)...

Regards,

Mike

[Mr V]

The GDC ruling was that a compressor of identical specs may be used in place of the 090C, since the 092C and 095C only differ in their use of an external filter or a different bracket they are fine. If you are worried about passing inspection go to Viar's website and do a screen print of the spec page for the 090C and the the one you are using.

[Mark McLeod]

Here's the rule that applies.

Originally Posted by Robot Section Rev I

<R69> Compressed air for the pneumatic system on the ROBOT must be provided by one and only one compressor. This compressor may be either the compressor from the KOP, or an equivalent compressor that does not exceed any of the KOP compressor performance specifications (specifically: nominal 12v, 1.03 cfm flow rate, 120psi maximum working pressure). Compressed air shall not come from any other source. Off-board compressors must be controlled and powered by the ROBOT.

[Mr V]

Here is the page for the KOP 090C compressor

http://www.viaircorp.com/OnRoad/90C.html

The 092C

http://www.viaircorp.com/OnRoad/92C.html

And the 095C

http://www.viaircorp.com/OnRoad/95C.html

[Juggernaut]

The problem I have now is that technically, neither the 90C or 92C compressors actually are in compliance with R66.

<R66> In addition to the items included in the KOP, pneumatic system items specifically permitted on 2011 FRC ROBOTS include the following items. All included items must be “off the shelf” COTS pneumatic devices rated by their manufacturers for working pressure of at least 125psi and burst pressure of 250psi, and used in their original, unaltered condition (except as required for assembly with other components).

The working pressure of the compressors is 120psi and the only rating I found for the burst pressure was 200psi.