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Charging a pen gun

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.
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Charging a pen gun

Unread postAuthor: Tipsypyro » Thu Jan 29, 2015 9:29 pm

I know I probably missed existing info, but I looked a lot. What is the best way to keep a pen gun from firing on pulling off the chuck? Is there a way to air up a schrader valve equipped gun without mechanically depressing the stem?
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Re: Charging a pen gun

Unread postAuthor: bravootome » Fri Jan 30, 2015 1:16 am

Tipsypyro wrote:I know I probably missed existing info, but I looked a lot. What is the best way to keep a pen gun from firing on pulling off the chuck? Is there a way to air up a schrader valve equipped gun without mechanically depressing the stem?


Simply, remove the spring from the stem, and cut away it's pin. This way it wont be mechanical but it will be depressed by the pressure itself . It's the way i did. It will be a check valve.
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Re: Charging a pen gun

Unread postAuthor: Tipsypyro » Fri Jan 30, 2015 12:12 pm

Thank you. I was going to try to remove the center pin of an air chuck. This makes sense for filling, but without the pin, how will you fire it?
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Re: Charging a pen gun

Unread postAuthor: jackssmirkingrevenge » Tue Feb 03, 2015 10:36 pm

Get yourself a shock pump that allows you to independently depress the schrader pin:

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Re: Charging a pen gun

Unread postAuthor: Tipsypyro » Thu Feb 05, 2015 4:18 pm

Thank you.
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