QDV Piston leak question

1 post • Page 1 of 1

Pro: Recruit; Posts: 2; Joined: Wed Oct 23, 2024 1:01 pm

Quote

Tue Oct 29, 2024 4:47 pm

Regarding the famous QDV valve as outlined in this video:

There is one thing I am not understanding.
Once the rod is retracted and the piston valve activation begins, what prevents air from flowing through the shaft hole in the center of the piston and out of the end cap assembly?

Post Reply

1 post • Page 1 of 1

Create an account or sign in to join the discussion

You need to be a member in order to post a reply

Create an account

Not a member? register to join our community
Members can start their own topics & subscribe to topics
It’s free and only takes a minute

Sign in

Similar Topics

Replies

Views

Last post

Pilot leak down question.

Last post by jackssmirkingrevenge « Sun Sep 27, 2009 1:55 am
Posted in Pneumatic Cannons
Replies: 4
by boyntonstu » Sat Sep 26, 2009 3:21 pm » in Pneumatic Cannons

First post

I have seen pilot leaks when experimenting with my cannon with no piston movement.

Many folks warn of the danger of pilot leaks.

I have seen 300...

Last post

There is no such thing as a safe cannon.... Follow firearm rules... ie, it's always loaded, don't point it anything you don't want destroyed, and...

4 Replies

1014 Views

Last post by jackssmirkingrevenge
Sun Sep 27, 2009 1:55 am
Finding and sealing piston leak

Last post by boyntonstu « Sat Oct 10, 2009 11:28 am
Posted in Pneumatic Cannons
Replies: 7
by boyntonstu » Sat Oct 10, 2009 9:31 am » in Pneumatic Cannons

First post

My gun was leaking.

I pressurized it to 100 psi and dipped the muzzle into a bucket or water.

Nice bubbles.

I surmised that the leak was through...

Last post

Seems good im suprised it worked on wood might have to get me some of that stuff :) as it seems that teflon tape can be a bit hard to get to seal....

7 Replies

1587 Views

Last post by boyntonstu
Sat Oct 10, 2009 11:28 am
Barrel-Sealing Piston Valve Leak Problem

Last post by keep_it_real « Sun Aug 24, 2008 9:40 am
Posted in Pneumatic Cannons
Replies: 3
by spudkilla224 » Sun Aug 24, 2008 8:13 am » in Pneumatic Cannons

First post

i just test fired my barrel-sealing piston cannon, and i could here a leak coming out of the front of the 2 Tee. the leak is coming from my 2 X1.5...

Last post

use epoxy and go all they way around the bushing.

3 Replies

1046 Views

Last post by keep_it_real
Sun Aug 24, 2008 9:40 am
A Leak

Last post by frankrede « Sun Nov 05, 2006 1:59 am
Posted in General Cannon Discussion
Replies: 17
by MadHatter » Tue Jul 18, 2006 12:40 pm » in General Cannon Discussion
1

2
First post

Hi I am new here, just made my first ever spud gun (it is a pnumatic) I gut the basic how-to from here. The problem it that the end cap on my tank...

Last post

WOW!Thats pricey, but I live in las vegas and the city is constantly growing and lots of people do their own irrigation or hire cheap laborers to do...
17 Replies

4947 Views

Last post by frankrede
Sun Nov 05, 2006 1:59 am
odd CO2 leak

Last post by singularity « Thu Dec 20, 2007 11:04 am
Posted in Ammo & Materials
Replies: 5
by singularity » Thu Dec 20, 2007 12:09 am » in Ammo & Materials

First post

i have had my 5lb co2 setup for about a year now and have used it quite a bit. i have taken off the reg, changed out tanks, ect without incident...

Last post

never had a spacer before with my tank, and the o-ring seems to be almost impossible to remove, where could a buy a spacer/washer? do paintball...

5 Replies

1787 Views

Last post by singularity
Thu Dec 20, 2007 11:04 am

Return to “Pneumatic Cannons”