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| BOMBOMBOMB |
 Posted: 10/12/2007 6:27 AM Post subject: |
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Sergeant
Joined: 07 Oct 2007
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| oh lol sorry i couldnt see it on the top down view or vid |
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| omgimonfrie2 |
| Posted: 10/12/2007 22:22 PM Post subject: |
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Private
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| spudgunnerwryyyyy wrote: | | This is a great tutorial. I suggest omgimonfrie2 should start simple when he has gained enough knowledge then build a piston valve. It is a great learning process my friend. |
I was going with a 2.5 in. barrel until recectly, so a ball/piston valve would be too restreicive. I'm not saying I'm a noob though. Will a golf ball fit in a .75in barrel? |
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| MrCrowley |
| Posted: 10/12/2007 22:28 PM Post subject: |
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2.5" barrel would be bad as it is rare unless bought online, and fittings are also rare.
A golfball will fit in 1.5" SDR-21 if you are American, or 40mm PN18 PVC if you are Aussie/NZ etc |
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| omgimonfrie2 |
| Posted: 10/13/2007 21:47 PM Post subject: |
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| MrCrowley wrote: | 2.5" barrel would be bad as it is rare unless bought online, and fittings are also rare.
A golfball will fit in 1.5" SDR-21 if you are American, or 40mm PN18 PVC if you are Aussie/NZ etc |
Well I did find a 2.5in barrel to day, forgot to look for fittings though. A golf ball fill not fit in a 1.5in barrel, I curently use one and they do not fit. What does SDR-21 and PN18 mean? I never can read the pipe much less understand it. As far as my knowledge goes pressure rated is pressure rated. And thanks for all the help. |
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| DYI |
| Posted: 10/13/2007 22:01 PM Post subject: |
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Major General
Joined: 07 Jul 2007
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SDR 21 pipe has thinner walls, and GBs will fit in 1.5" SDR 21 quite well.
As far as reading the pipe, it is a good idea. Pressure rated is pressure rated, but if it's only rated for 15 psi and you use it at 150psi, you may have a problem.
Last edited by DYI on 10/13/2007 22:06 PM; edited 1 time in total |
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| MrCrowley |
| Posted: 10/13/2007 22:05 PM Post subject: |
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| omgimonfrie2 |
| Posted: 10/13/2007 22:59 PM Post subject: |
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Well it is possilbe that I am not using SDR 21, and I'll start looking for my own answers.
EDIT: I looked and did not find. Is super glue an okay solvent for brass piping? I just bought parts for a marshmellow sniper. |
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| MrCrowley |
| Posted: 10/13/2007 23:03 PM Post subject: |
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What?
I just gave you the answer, probably the only answer and most practical (aside from metal pipes and making your own barrel)
Super glue may be fine for a marshmellow gun but nothing involving anything over 5psi. |
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| BOMBOMBOMB |
| Posted: 10/13/2007 23:20 PM Post subject: |
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Sergeant
Joined: 07 Oct 2007
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lol my pipe doesnt seem to have a rating or is the pn-18 a pressure rating if so could someone link me wiht a page of what the pressure is?
cheers Nato |
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| MrCrowley |
| Posted: 10/13/2007 23:28 PM Post subject: |
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Where do you live? What does the pipe say?
Tell me everything that is written on the pipe. |
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| BOMBOMBOMB |
| Posted: 10/13/2007 23:32 PM Post subject: |
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Sergeant
Joined: 07 Oct 2007
Posts: 98
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hr products
as1477.2 pn18
20mm pvc
cat 10
hr-p01020
barcode 0314538015247 |
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| MrCrowley |
| Posted: 10/13/2007 23:43 PM Post subject: |
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| It's pressure rating is 260psi. |
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| BOMBOMBOMB |
| Posted: 10/13/2007 23:44 PM Post subject: |
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Sergeant
Joined: 07 Oct 2007
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| could you please xplain that formula? |
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| MrCrowley |
| Posted: 10/13/2007 23:51 PM Post subject: |
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PN stands for Pressure Number
DN stands for Diameter Number
PN18 means 18 BAR
1BAR = 14.5psi
18BAR x 14.5 = 261psi
10BAR = 145psi = 1mPa = 1000kPa
DN20 means Diameter = 20mm(nominal diameter)
So I take it you don't live in America then  |
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| BOMBOMBOMB |
| Posted: 10/14/2007 1:53 AM Post subject: |
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Sergeant
Joined: 07 Oct 2007
Posts: 98
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abviously cheers for the help
Nato |
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