semi-auto valve unit for under $20

Semi-automatic valve unit made from a cheap Quick Exhaust Valve and Slide Valve, tested at 110 psi hooked up to a compressor.

QEV specs:

Model QE-02
Gold Tone Port Diameter 16mm/ 5/8"
Inlet/ Outlet Ports Diameter 12.5mm/ 1/2"
Flow Medium Air
Operating Pressure 0-0.8 kgf/cm2
Working Temperature 0 - 60 oC
Total Size 52 x 36 x 28mm/ 2" x 1.4" x 1.1" (L*W*T)
Main Material Aluminum Alloy
Color Black & Gold Tone
Net Weight 105g

Slide Valve specs:

Material Metal
Male Thread Outside Diameter(Approx.) 13mm / 33/64"
Female Thread Inside Diameter(Approx.) 13mm / 33/64"
Total Size (Approx.) 27 x 57mm / 1 1/16" x 2 1/4" (Max. D * L )
Color Silver Tone, Blue
Weight 44g

• Category

  Science & Technology

[8tonsemi]

If your talking about the qev then yes they always have three holes.

[owen burce]

do they usually have 3 holes or did you just modified it?

[kerimil]

your hands are hairy

[pyronathanpyro]

ahh cool cheers :) yeah i will most likely use airsoft bb so that i can make an airsoft sniper will probably rig up a little bolt mechanisim with a few o rings so that the bb sits tight before been fired :) xd cheers

[501stlegioncommander]

Nah, this stuff is my hobby, I know from memory. Is this for airsoft? If it is, a 1/2" chamber at 3" long will be enough, and a 24" barrel will be fine. Maybe a tee mag.

[pyronathanpyro]

why thank you i take it you calculated some stuff ? so if i were to make it 1 inch wide by 6 inch long capped off and then with a barrel of 24 inches and the diameter of the barrel will probably be 6mm will that get good power and accuracy and stuff ? cheers

[501stlegioncommander]

Make it a 1 inch diameter by 6" long chamber, and add a 24" long barrel and it will be good to go.

[pyronathanpyro]

cheers buddy i figured :) im going to make a bigger chamber personaly so i get more power :) xd

[501stlegioncommander]

The part he is holding is the chamber, easy to make. Just find the right sized fitting and put it there, and cap off the other side.

[Davide Sniper]

this valve have a very nice designer !