2" Piston valve 1.5" porting

[Gun Freak]

Here is my valve I made yesterday, its for my golf ball gun. Whole thing will hopefully be done by tomorrow and I'll post it this weekend. Or maybe sooner. But anyway, the piston is Hubb's 2" piston design (1 1/4" coupling), the bumper is some car washing sponge foam with a few squishy rubber disks (6 of them about 1/8" thick), which I am not sure if it will hold up. What do you think? The pilot is a 1" modded sprinkler pilot by a severly modded blowgun, and the front connection is a 1.5" female adapter. The seat is 1.5"

Whole:


Pilot:


Piston:


Closed:


Open:


From front:


Bumper, I'm scared it isn't enough...


To be used on this gun:

[clemsonguy1125]

Looks great but isnt the porting 1.5 inch because thats what the seat is? Cant wait to see the gun

[Gun Freak]

The seat is what the piston seals against right?
The tee has a bottom port of 2" so it is a 2" porting.

[clemsonguy1125]

You sure, I think the porting refers to the size the seat pipe is.

[Gun Freak]

Hmm I don't think so. Maybe you're right. We'll wait for somebody else to reply. I'm pretty sure the seat is the diameter of the pipe it seals against and the porting is the bottom.

[jor2daje]

Porting is where the air leaves from so in your case it is 1.5" porting

[clemsonguy1125]

Ok, but I think what i said is true, read MrCrowleys state below the video
http://www.instructables.com/id/Golf-Ba ... -Shoot-40/

[MrCrowley]

Yup, the porting refers to the seat size. Even if your seat was 1.8", seeing as you have a 1.5" adapter the porting would only be 1.5" as that is the restricted flow diameter.

All sizes are nominal as well, even though 1.5" pipe doesn't have an I.D or O.D of 1.5", you'd still say the porting is 1.5".
Nice piston valve though, does it work?
Your chamber is volume is massive haha, but if you have a big compressor it doesn't really matter.

[Gun Freak]

Yeah I have a big compressor. The chamber is freaking badass though.

Well then I'll edit the title. I thought the porting was the bottom port of the tee.

[clemsonguy1125]

Imagine trying to take that up to 100 psi with a bike pump, what about covering the bumper with duct tape and add some rubber tubing

[Gun Freak]

It would take about 10 minutes for me to get it that high with a bike pump lol

I'll try reinforcing the bumper with some duct tape.
theres some rubber hose in the neighbors trash so i'll get some

[clemsonguy1125]

lucky, i pay 1.50 a foot at lowes for latex rubber tubing(I use it for paint grenades)

[Gun Freak]

it's just some garden hose but i'll stick it long ways up my bumper to make the hole in the middle bigger and to reinforce it

[clemsonguy1125]

it's just some garden hose but i'll stick it long ways up my bumper to make the hole in the middle bigger and to reinforce it

You could use a pool noodle, I heard one person say it got sucked into the valve but Id think you would have the same problem with the foam your using now

[Gun Freak]

Yeah I'm gonna ask reed if he has one to use cuz i dont trust my current bumper