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rparigoris
Joined: 24 Nov 2009
Posts: 792
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 Posted: Wed Mar 17, 2010 10:04 pm Post subject: Question about plumbing air, not electrons |
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What sealant if any should I be using on 1/8" NPT connections for pitot, static and AOA on instruments?*Brass female and Brass male*Brass female and Aluminum male*Brass female and Nylon male*Aluminum female and Nylon maleIs it acceptable to use .250" OD .125" ID Tygone tubing going over .1875" OD (before single barb) nipple for pitot, static and AOA plumbing? A little heat on tubing from a heat gun and it slides right on. Would it be worth it to put a double wrap of .020" safty wire on Tygon tubng near root to act as a clamp?I have a two pneumatic switches, one to select between static and total energy for Ilec variometer and one to function to allow alternate static. these switches have a stainless body with female 10-32 straight threaded ports. The .1875' OD nipples I want to use are male straight threaded 10-32 that come with a flat sealing washer. What if anything should I be putting on threads as a sealant?Thx.Ron Parigoris [quote][b]
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Jim Berry
Joined: 10 Jan 2006
Posts: 237
Location: Denver
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| Posted: Thu Mar 18, 2010 8:58 am Post subject: Re: Question about plumbing air, not electrons |
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Ron,
If your nylon fittings are Nylo-Seal brand, I recently asked this question of their tech support and they recommend nothing on the threads. I did my pitot and static lines with Nylo-Seal fittings throughout and both passed the manometer test without leaks.
Jim Berry
RV10
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