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Old 2009-09-11, 5:16pm
Dale M.'s Avatar
Dale M. Dale M. is offline
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Join Date: Jun 10, 2005
Location: A Little Bit West of Yosemite Valley
Posts: 5,200
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Quote:
Originally Posted by Oh Honey View Post
I like the bleed off idea. I wonder if there is a way to shutdown the compressor and then bleed off the oxycons till the compressor kicks in? Would be the best of both worlds but can't figure anyway it would be possible.
It's all just pressure switches, solenoid valves and relays....... And how you want them sequenced...

Actually its quite simple........ A solenoid valve (open when NOT energized) put in line with "tee" fitting between oxycon output and input to vacuum pump.... When tank pressure low, tank high/low pressure switch call for pump to turn on, also closes solenoid, when tank reached max pressure switch cuts power to pump, also cuts power to solenoid so output of oxycons is now "free flowing" to atmosphere (or where ever)... Remember solenoid is open under a no power situation and closed when energized.....

IF you cant find a solenoid, with those conditions, you use solenoid that closes when energized and you invert control of solenoid with relay.... When tank pressure switch is low and calls for compressor/pump to start it also calls relay to operate, relay opens contacts in circuit to solenoid and it actually closes, cutting off venting to atmosphere...

Dale
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Last edited by Dale M.; 2009-09-11 at 7:21pm.
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