Login    Register
User Information
Username:
Password:
We are a free and open
community, all are welcome.
Click here to Register
Sponsored
Who is online

In total there are 35 users online :: 4 registered, 0 hidden and 31 guests


Most users ever online was 218 on Wed Dec 07, 2016 6:58 pm

Registered users: Bing [Bot], Google [Bot], MSNbot Media, Yahoo [Bot] based on users active over the past 5 minutes

The Team
Administrators
Global Moderators
global_moderators.png CS

diaphram valve...

A place to ask general spud cannon related questions.
Sponsored 
  • Author
    Message

diaphram valve...

Unread postAuthor: darthtator » Wed Jul 27, 2005 3:10 pm

I have recently decided to make a small diaphram valve cannon. Thus, being my first diaphram cannon is the reason for the smaller size. I'm making it almost exactly to plans of the "Atom Project" cannon, with a few minor changes. It will have a 1 1/4"x 14" chamber and a 1/2"x about 13" barrel. I had a few questions about this diaphram valve that I thought you could help me with. I am going to use a threaded clean out in the back of the chamber to give me access to the diaphram just incase of some difficulties. I was wondering about the exact placement of the valve. should the diaphram be in with the threads so when the cap is screwed on, it pushes the valve against the barrel? Or should there be a gap between the cleanout coupler and the barrel? If so how big of a gap? I did a search on google to find someof the answers I had and found most on this site- http://www.thebugshop.org/othersites/ai ... ud_op.html - I was just wondering if the information presented on this site are accurate to go by. Thanks in advance for help.

Nick
  • 0

Your hands can't hit what your eyes can't see, float like a butterfly sting like a bee. *Ali*

darthtator
Private First Class
Private First Class
 
Posts: 33
Joined: Mon Jul 04, 2005 1:45 pm
Location: Arizona
Reputation: 0

Re: diaphram valve...

Unread postAuthor: spudshot » Wed Jul 27, 2005 8:19 pm

please dont use a cleanout, use a pressure rated (nsf-pw marked on fitting) threaded plug, cleanouts are DWV and are not safe, they've even blown on combustions

as for the valve placement, make the barrel long enough to be at about the place where the plug wont go in anymore (good way, count the threads on the plug that went into the female, then count up that many threads in the female adapter, and stop the barrel there) from the inside of the female adapter, taht way you just put in the phragm, and screw in the plug, that will keep the phragm in place. yes the plug should push the phragm against the barrel, but it shouldnt push it too much.

also i wouldnt use just a hole to shove a blowgun in, you should really tap a 1/8" hole for a schrader valve, and a 1/4" hole for a ball valve, or use one 1/4" hole, and use a tee and a reducer to attatch both the schrader and the ball valve for exhaust.

another thing, dont use a bell reducer, use a coupling and bushings, that are NSF-PW. and solvent weld, dont just glue http://www.burntlatke.com/weld.html
  • 0

Image

spudshot
Brigadier General
Brigadier General
 
Posts: 1036
Joined: Sun Oct 03, 2004 7:16 am
Reputation: 0

Unread postAuthor: darthtator » Thu Jul 28, 2005 1:29 pm

ok thanks for the advice. I wasn't planning on using a cleanout sorry for the miscomunication. I must have had a brain fart or something. And I was also planning on doing the schrader valve ball valve setup. If i can avoid it I never use bell reducers. The tee Idea sounds much better then what I had in mind, I'll do that instead. Thanks again for the helpful information. It is greatly appreciated!

Nick
  • 0

Your hands can't hit what your eyes can't see, float like a butterfly sting like a bee. *Ali*

darthtator
Private First Class
Private First Class
 
Posts: 33
Joined: Mon Jul 04, 2005 1:45 pm
Location: Arizona
Reputation: 0

Return to General Spud Cannon Related

Who is online

Registered users: Bing [Bot], Google [Bot], MSNbot Media, Yahoo [Bot]

Reputation System ©'