YS checkvalve

[Atwood, Mark]

Ok...I'll plead ignorance.  I'm running a DZ with a vent line and apparantly leaking fuel on downlines in a BIG way.   How do you have the check valve setup on the vent line???  Are you removing it to fill the tank?  
 
Confused...
 
Mark
-----Original Message-----
From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org]On Behalf Of Rcmaster199 at aol.com
Sent: Wednesday, June 30, 2004 6:22 PM
To: discussion at nsrca.org
Subject: Re: YS checkvalve


True enough Dean. Except a vent placed in a cumbersome location makes it hard to attach your overflow tubing onto, when filling the tank. Vent fitting in close proximity to the fill fitting makes that much easier. I just don't care to overflow fuel all over the ground. It's a matter of convenience and/or preference

MattK



Subj:RE: YS checkvalve 
Date:6/30/2004 1:27:40 PM Eastern Daylight Time
From: d.pappas at kodeos.com
Reply-to: discussion at nsrca.org
To: discussion at nsrca.org
Sent from the Internet 



Hi Nat,
I used the YS check valve with both my O.S. 140 RX and Mintor, and never had a dribble issue. At the table I tend to dribble, but that's another issue! One thing that works well for many is to run the tank vent to a place well behind the tank. If the end of the vent line is both behind and below the tank when upright, then there will be no siphoning problem in flight, or on the ground. 
Regards,
    Dean 



-----Original Message-----
From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org]On Behalf Of Nat Penton
Sent: Wednesday, June 30, 2004 1:08 PM
To: discussion at nsrca.org
Subject: YS checkvalve


The YS checkvalve will readily open with almost zero differential pressure. Going the other way it takes about two psi to get a seal. At a lower pressure there will be some dribble. Is there a better solution for the tank vent line?    Nat Penton







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