Go Back  RCU Forums > RC Airplanes > Tips & Techniques
Ho do you avoid a leaky setscrew in an air control valve >

Ho do you avoid a leaky setscrew in an air control valve

Notices
Tips & Techniques Want to share a tip or special technique you have either in the workshop or at the flying field or race track? Post it right here!

Ho do you avoid a leaky setscrew in an air control valve

Old 08-14-2002, 11:44 PM
  #1  
Senior Member
Thread Starter
My Feedback: (2)
 
Join Date: Jan 2002
Location: Center, ON, CANADA
Posts: 174
Likes: 0
Received 0 Likes on 0 Posts
Default Ho do you avoid a leaky setscrew in an air control valve

I made a couple of air control valves using a drill press, lathe, brass tubing and JB weld. The one without the setscrew worked great but I had to pinch the airlines in order to control the air pressure.

With my second one I followed Robart's design but found the a lot of air seeped between the thread and set screw rendering it disfunctional.

Any ideas on how the pros avoid this?

Any help would be appreciated.

Thanks

Norman
Attached Thumbnails Click image for larger version

Name:	21528_2400.jpg
Views:	11
Size:	29.5 KB
ID:	13649  
Old 08-14-2002, 11:49 PM
  #2  
Senior Member
My Feedback: (10)
 
C_Watkins's Avatar
 
Join Date: Jun 2002
Location: Douglasville, GA
Posts: 1,071
Likes: 0
Received 0 Likes on 0 Posts
Default Teflon tape?

You can give Teflon tape a try. It works wonders on stuff like this sometimes.
(Especially if it's a "set and forget" thing. It won't handle a lot of constant fiddling.)


If I were going to attempt something like this, I'd use a bolt that only had
threads at the very end, and a smooth shank the rest of the way up.

That way, you could machine in a receiver groove for an O-ring, and top
it off with a small flat cover held on by a couple of screws. That would do it.
Old 08-15-2002, 12:09 AM
  #3  
Senior Member
 
Join Date: Dec 2001
Location: Elk Grove Village, IL
Posts: 391
Likes: 0
Received 0 Likes on 0 Posts
Default Control Valve

Norman: I imagine that the "pros" just buy their valves from the manufacturers. And rely on them having worked all the kinks and problems out of their products before offering them to the public. Suggest you do the same. Regards.
Old 08-15-2002, 01:19 PM
  #4  
Senior Member
My Feedback: (4)
 
MinnFlyer's Avatar
 
Join Date: Apr 2002
Location: Willmar, MN
Posts: 28,519
Likes: 0
Received 8 Likes on 8 Posts
Default Ho do you avoid a leaky setscrew in an air control valve

Just coat the set screw with Vasaline. That should seal any air leaks.
Old 08-16-2002, 10:18 AM
  #5  
Senior Member
Thread Starter
My Feedback: (2)
 
Join Date: Jan 2002
Location: Center, ON, CANADA
Posts: 174
Likes: 0
Received 0 Likes on 0 Posts
Default valve

Thank you gentlemen, the Teflon tape worked great.

NR

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are On


Thread Tools
Search this Thread

Contact Us - Manage Preferences Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.