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 52 users online :: 4 registered, 0 hidden and 48 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

Need input on this valve

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
Sponsored 
  • Author
    Message

Need input on this valve

Unread postAuthor: Gun Freak » Sun Apr 04, 2010 7:39 pm

I drew this up today, does everything seem right? If you need clarification, just ask, because I didn't label everything. It should be self-explanatory though. It is very similar to another diagram on this site.
  • 0

Attachments
CompPistonC.png
CompPistonC.png (31.29 KiB) Viewed 776 times
OG Anti-Hybrid
One man's trash is a true Spudder's treasure!
Golf Ball Cannon "Superna"M16 BBMGPengunHammer Valve Airsoft SniperHigh Pressure .22 Coax
Holy Shat!
User avatar
Gun Freak
Lieutenant General
Lieutenant General
 
Posts: 4969
Joined: Mon Jan 25, 2010 4:38 pm
Location: Florida
Country: United States (us)
Reputation: 11

Unread postAuthor: clemsonguy1125 » Sun Apr 04, 2010 7:43 pm

Looks good, I just dont get how the spacer fits, is it part of the piston or is it glued in the pipe?
  • 0

That is all.
User avatar
clemsonguy1125
Major General
Major General
 
Posts: 1485
Joined: Tue Jul 21, 2009 4:00 pm
Location: East Coast
Reputation: 1

Unread postAuthor: Gun Freak » Sun Apr 04, 2010 7:44 pm

It will probably be electrical tape or something similar wrapped around the one inch pipe with some lube because 1.25" PVC fits loosely over 1" PVC.
  • 0

OG Anti-Hybrid
One man's trash is a true Spudder's treasure!
Golf Ball Cannon "Superna"M16 BBMGPengunHammer Valve Airsoft SniperHigh Pressure .22 Coax
Holy Shat!
User avatar
Gun Freak
Lieutenant General
Lieutenant General
 
Posts: 4969
Joined: Mon Jan 25, 2010 4:38 pm
Location: Florida
Country: United States (us)
Reputation: 11

Unread postAuthor: deathbyDWV » Sun Apr 04, 2010 8:37 pm

Yeah it looks good...
  • 0

Life's too short to mark off the items on your wish list...
User avatar
deathbyDWV
Colonel
Colonel
 
Posts: 576
Joined: Sat May 16, 2009 4:02 pm
Location: Owasso, OK
Reputation: 2

Unread postAuthor: Mr.Sandman » Sun Apr 04, 2010 8:43 pm

Looks good but i think you will need a bumper or else you will crack your tee. Other than that it looks great, cant wait to see it.
  • 0

Yeah, it's that important.
User avatar
Mr.Sandman
Donating Member
Donating Member
 
Posts: 762
Joined: Fri Mar 28, 2008 9:10 am
Country: Antarctica (aq)
Reputation: 0

Unread postAuthor: velocity3x » Sun Apr 04, 2010 9:27 pm

I think the washer holding the neoprene seal in place should be a larger diameter (but just smallest enough to fit inside the PVC without hitting) or the neoprene seal can / will be torn away from the piston face.
  • 0

User avatar
velocity3x
Brigadier General
Brigadier General
 
Posts: 827
Joined: Fri Jun 05, 2009 3:09 pm
Location: Yuma, Arizona
Country: United States (us)
Reputation: 7

Unread postAuthor: clemsonguy1125 » Sun Apr 04, 2010 9:30 pm

Mine washer about that size was fine but I was only using it at 60 so I guess it depends on the pressure
  • 0

That is all.
User avatar
clemsonguy1125
Major General
Major General
 
Posts: 1485
Joined: Tue Jul 21, 2009 4:00 pm
Location: East Coast
Reputation: 1

Sponsored

Sponsor
 


Unread postAuthor: mark.f » Sun Apr 04, 2010 9:59 pm

I would make the washer as big as possible without the piston "jamming" (tilting when going forward slightly and catching, allowing air to escape).

Other than that, I suggest a bumper like Mr.Sandman said.
  • 0

User avatar
mark.f
Donating Member
Donating Member
 
Posts: 3464
Joined: Sat May 06, 2006 11:18 am
Country: United States (us)
Reputation: 21

Unread postAuthor: tghhs » Sun Apr 04, 2010 11:24 pm

yeh, though i'd have the barrel stopping just after the start of the 90 degree part. Not in the middle of it.

As is, it creates more turbulence and less flow.
  • 0

User avatar
tghhs
Sergeant Major
Sergeant Major
 
Posts: 176
Joined: Wed Dec 31, 2008 11:01 pm
Reputation: 0

Unread postAuthor: Gippeto » Mon Apr 05, 2010 1:02 am

Looks vaguely familiar.

@ Sandman...The o-ring as a bumper has been working for mine over MANY shots...no signs of any type of failures.
  • 0

"It could be that the purpose of your life is to serve as a warning to others" – unknown

Liberalism is a mental disorder, reality is it's cure.
User avatar
Gippeto
Donating Member
Donating Member
 
Posts: 2393
Joined: Sat Jan 19, 2008 10:14 am
Location: The Great White North...Canada eh!
Reputation: 11

Unread postAuthor: Gun Freak » Mon Apr 05, 2010 6:19 pm

Yes Gippeto I believe it was your drawing I modeled it after.

Where do you recomend to place the bumper? Or should I just go with an O-ring bumper?

Also, what is the easiest way to make O-ring grooves without a lathe or dremel?

And that washer wasn't really drawn to scale, I try to find as big a washer as possible. Thanks though.

EDIT: I made some changes to the drawing. The piston is longer and the barrel doesn't go as far into the tee for more flow.
  • 0

Attachments
CompPistonC.png
D3 rule. I figured it will have some serious power (:
CompPistonC.png (26.84 KiB) Viewed 658 times
OG Anti-Hybrid
One man's trash is a true Spudder's treasure!
Golf Ball Cannon "Superna"M16 BBMGPengunHammer Valve Airsoft SniperHigh Pressure .22 Coax
Holy Shat!
User avatar
Gun Freak
Lieutenant General
Lieutenant General
 
Posts: 4969
Joined: Mon Jan 25, 2010 4:38 pm
Location: Florida
Country: United States (us)
Reputation: 11

Unread postAuthor: ramses » Mon Apr 05, 2010 9:32 pm

as to the o-rings, a drillpress, drill-in-a-vice, table saw... knife...


A while back, tech posted a video about his floating O-rings. You will really want floating rings; they are amazing as far as friction goes.
  • 0

POLAND_SPUD wrote:even if there was no link I'd know it's a bot because of female name :D
User avatar
ramses
Major General
Major General
 
Posts: 1679
Joined: Thu May 29, 2008 6:50 pm
Reputation: 3

Unread postAuthor: tghhs » Mon Apr 05, 2010 9:35 pm

Gun Freak wrote:Yes Gippeto I believe it was your drawing I modeled it after.

Where do you recomend to place the bumper? Or should I just go with an O-ring bumper?

Also, what is the easiest way to make O-ring grooves without a lathe or dremel?

And that washer wasn't really drawn to scale, I try to find as big a washer as possible. Thanks though.

EDIT: I made some changes to the drawing. The piston is longer and the barrel doesn't go as far into the tee for more flow.


Very nice, i think that would do quite well. :D
  • 0

User avatar
tghhs
Sergeant Major
Sergeant Major
 
Posts: 176
Joined: Wed Dec 31, 2008 11:01 pm
Reputation: 0

Unread postAuthor: Gippeto » Mon Apr 05, 2010 10:58 pm

You "believe" so eh? :lol:

Alsheimers setting in at 13? Gotta be a new record. :lol:

It doesn't matter....tons of ideas on this site to choose from. That's why they get posted. Everyone puts their own twist on things, sometimes it comes out better...somtimes not. That's just how it goes.

But;

Why the "freak"in HUGE increase in pilot volume?
  • 0

"It could be that the purpose of your life is to serve as a warning to others" – unknown

Liberalism is a mental disorder, reality is it's cure.
User avatar
Gippeto
Donating Member
Donating Member
 
Posts: 2393
Joined: Sat Jan 19, 2008 10:14 am
Location: The Great White North...Canada eh!
Reputation: 11

Unread postAuthor: Gun Freak » Tue Apr 06, 2010 8:39 am

Ummm the pilot volume didn't increase that much... what do you suggest change to lower it? I want to make it as good as possible.

Edit- I was thinking about getting some 3/4"PVC inside the one inch to lower the volume and maybe even fill that up with some epoxy then drill a hole in it for the air to pass... I'll draw it up when I get home. No Google SketchUp at school :lol:

EDIT2- So here it is, the purple is the 3/4 pipe jammed inside the 1" to lessen the volume and the green is still epoxy. I put dotted lines on the spacer to represent the shape the epoxy will be molded in to make room for the bolt and washer on the back and also to lower the pilot volume... which is amazingly little now. BTW the 3/4 pipe inside of the one inch pipe goes all the way to the end of the 1" pipe inside the female adapter on the right, along with the epoxy for minimal pilot volume. What do you think? I need to know also if the small diameter of the hole to the pilot valve is too little for flow... :P
Thanks.
  • 0

Attachments
CompPistonC.png
CompPistonC.png (27.95 KiB) Viewed 573 times
OG Anti-Hybrid
One man's trash is a true Spudder's treasure!
Golf Ball Cannon "Superna"M16 BBMGPengunHammer Valve Airsoft SniperHigh Pressure .22 Coax
Holy Shat!
User avatar
Gun Freak
Lieutenant General
Lieutenant General
 
Posts: 4969
Joined: Mon Jan 25, 2010 4:38 pm
Location: Florida
Country: United States (us)
Reputation: 11

Next

Return to Pneumatic Cannon Discussion

Who is online

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

Reputation System ©'