Hi Guys, Bob of Robert's Rocket Project ( http://watzlavick.com/robert/rocket/index.html) has a chat with us recently about feed system components. Here are the key takeaways:
-Super cheap sintered bronze filters are available from Mcmaster Carr (98355K853) and appear to be both ethanol and LOX compatible. -Bob recommends 6-12" of isolation of pressure relief system from the vent valve/LOX tank manifold assembly (conduction path, unless a failure has occurred there should be no flow path of the LOX directly to these components). -3/8" on the main lines may be too small. There are NASA guidelines for maximum flow speed in tubes which we should follow. -Bob recommends a (valveless) full-flow quick disconnect on the LOX fill. -Bob recommends a snap-tite QD fitting on fuel fill. -It's imperative that the vent valve be cryo rated, he suggest that it be 1/2" sized. -Fill LOX from a low pressure dewer (turn off the pressure builder valve); we will want to fill w/ 30 psi or so. -Bob suggests that we use Orego globe valve for the LOX manual bleed valve. Something along the lines of http://www.ebay.com/itm/Rego-BK9454-Shut-Off-Valve-Cryogenic-1-2-FNPT-Extended-4-Stem-NEW-/142082667537?hash=item2114c97411:g:ltUAAOSwIgNXrKwZ Ad astra, Erin Schmidt
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