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David Drake wrote:

>My commercial buddy uses surface supply and says that $28 is a 
>good price for the overpressure relief valve.  He also said that new 
>Poesiden 1st stages have them built in 'cause so many poeple used 
>them as argon regulators and such.  I haven't called a dealer on 
>this.

>DAVID DRAKE       AHDNN1A.DDRAKE01@ED*.CO*
>ROMULUS, MICHIGAN  EDS/GM POWERTRAIN8-375-5467 (GM NET)

I asked a number of questions (on the tek list) about the overpressure 
valve in the new poseidon 1st stages, because I wanted to use a 2nd 
stage with an upstream valve on them.  I didn't get any really 
unequivocal answers.  So, here goes:

Do the new poseidon 1st stages vent excess interstage pressure in the 
event of "1st stage creep" or slow first stage leaking occuring? To 
where do they vent the air?  Is there a max limit for venting 
throughput?

All answers gratefully recieved.

Thanks
Jon

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