---------------------------------------------------------- Zenith-List Digest Archive --- Total Messages Posted Wed 10/29/14: 4 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 08:50 AM - elbow fitting (Carlos Sa) 2. 09:28 AM - Re: elbow fitting (Jay Bannister) 3. 09:47 AM - Re: elbow fitting (FLYaDIVE) 4. 10:05 AM - Re: elbow fitting (Carlos Sa) ________________________________ Message 1 _____________________________________ Time: 08:50:06 AM PST US From: Carlos Sa Subject: Zenith-List: elbow fitting When attaching an elbow fitting ( http://www.aircraftspruce.ca/catalog/hapages/an822.php) to a fuel valve (or anything else, for that matter), how can you have it oriented in a particular direction AND ensure it is leak-free? Carlos ________________________________ Message 2 _____________________________________ Time: 09:28:07 AM PST US Subject: Re: Zenith-List: elbow fitting From: Jay Bannister Carlos, I could not use that fitting.with the Andair fuel selector valve, tighten leak free and get the proper orientati on. I eventually used banjo fittings to get the proper or ientation. -- Jay=0A =0A=0A =0A=0A =0A=0A-----Original Message -----=0AFrom: Carlos Sa =0ATo: zenith-list =0ASent: Wed, Oct 29, 2014 10:52 am=0ASubject: Zenith-List: elbow fitting=0A=0A=0AWhen attaching an elbow fittin g (http://www.aircraftspruce.ca/catalog/hapages/an822.php) to a fuel v alve (or anything else, for that matter), how can you have it oriented in a particular direction AND ensure it is leak- ________________________________ Message 3 _____________________________________ Time: 09:47:46 AM PST US Subject: Re: Zenith-List: elbow fitting From: FLYaDIVE Great question Carlos: Here are some points to follow: 1 - Use a Fuel Proof Thread Sealant. This is especially true when dealing with similar metals being tightened together - Example: Aluminum to Aluminum. If this is the case then Galling becomes an issue. 2 - Since you are dealing with pipe threads you only need a 3 thread engagement for a seal to be good. So, what you then use is the ADDITIONAL rotation/thread engagement for the lining up. 3 - This part is a bit more difficult and requires lots of additional thought... Replace the NPT with some other type of thread arrangement. Maybe a UNION, or a flair fitting. Side note: It is always best if you can stay away from 90 Deg bends in a fuel system. Each bend reduces the flow rate and can cause caviation. Smooth round bends are best. Yes, I know when all else fails sometimes you are forced to go the route of 90 deg bends. Barry On Wed, Oct 29, 2014 at 11:49 AM, Carlos Sa wrote: > When attaching an elbow fitting ( > http://www.aircraftspruce.ca/catalog/hapages/an822.php) to a fuel valve > (or anything else, for that matter), how can you have it oriented in a > particular direction AND ensure it is leak-free? > > Carlos > > * > > > * > > ________________________________ Message 4 _____________________________________ Time: 10:05:49 AM PST US From: Carlos Sa Subject: Re: Zenith-List: elbow fitting Barry, thanks, that makes sense. Carlos On 29 October 2014 12:47, FLYaDIVE wrote: > Great question Carlos: > > Here are some points to follow: > 1 - Use a Fuel Proof Thread Sealant. This is especially true when dealing > with similar metals being tightened together - Example: Aluminum to > Aluminum. > If this is the case then Galling becomes an issue. > > 2 - Since you are dealing with pipe threads you only need a 3 thread > engagement for a seal to be good. So, what you then use is the ADDITIONAL > rotation/thread engagement for the lining up. > > 3 - This part is a bit more difficult and requires lots of additional > thought... Replace the NPT with some other type of thread arrangement. > Maybe a UNION, or a flair fitting. > > Side note: It is always best if you can stay away from 90 Deg bends in a > fuel system. Each bend reduces the flow rate and can cause caviation. > Smooth round bends are best. Yes, I know when all else fails sometimes you > are forced to go the route of 90 deg bends. > > Barry > > On Wed, Oct 29, 2014 at 11:49 AM, Carlos Sa wrote: > >> When attaching an elbow fitting ( >> http://www.aircraftspruce.ca/catalog/hapages/an822.php) to a fuel valve >> (or anything else, for that matter), how can you have it oriented in a >> particular direction AND ensure it is leak-free? >> >> Carlos >> >> * >> >> arget="_blank">http://www.matronics.com/Navigator?Zenith-List >> tp://forums.matronics.com >> _blank">http://www.matronics.com/contribution >> >> * >> >> > * > > > * > > ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message zenith-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Zenith-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/zenith-list Browse Digests http://www.matronics.com/digest/zenith-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.