Hammer valve how to(valve+trigger part)

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wyz2285
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Mon Aug 15, 2011 12:02 pm

As somebody asked me to make a how to about using a blowgun to make a hammer valve, here it goes :)
I will make a video for it, but for now only pictures, I think all of you are able to understand it :wink:
Basically, you need a blowgun(I do mean blowgun, not these 3000 psi rated pressure washer gun, but if you have a 3000 psi blowgun that´s very cool :D ), a saw(hand or electric, as soon as it cuts metal), a drill.
I would also recommend dremel with cutting disc for metal, gloves, eye protection and mask(protects you from the cutting dust)
If you have any questions, feel free to ask
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drill a hole on the buttom of the valve body, it will be used to connected to the chamber. When finished, assemble all the parts back together and the valve is done.
drill a hole on the buttom of the valve body, it will be used to connected to the chamber. When finished, assemble all the parts back together and the valve is done.
This is the end cap, it has a o´ring to seal the valve stem, you can remove the o-ring and drill a bleed hole if you want semi or full auto (I´m trying that)
This is the end cap, it has a o´ring to seal the valve stem, you can remove the o-ring and drill a bleed hole if you want semi or full auto (I´m trying that)
open the valve, replace the spring using a weaker one if you want(not absolutely necessary), and replace that rubber disc using a harder one, so it won´t be crashed under high pressure.
open the valve, replace the spring using a weaker one if you want(not absolutely necessary), and replace that rubber disc using a harder one, so it won´t be crashed under high pressure.
the output hole
the output hole
the input hole, I used to connect it directly to my chamber, but in this tutorial, I´m going to block it with epoxy
the input hole, I used to connect it directly to my chamber, but in this tutorial, I´m going to block it with epoxy
first, cut the valve section of the blowgun
first, cut the valve section of the blowgun
diagram about chamber+valve assemble
diagram about chamber+valve assemble
Sem Título.jpg (31.02 KiB) Viewed 22985 times
the trigger mecanism housing, I just used groove aluminium. lenth dependes the size of you trigger
the trigger mecanism housing, I just used groove aluminium. lenth dependes the size of you trigger
the trigger mecanism, all cutted from a aluminium plate, but this mecanism can be only used in single/full auto .
the trigger mecanism, all cutted from a aluminium plate, but this mecanism can be only used in single/full auto .
striker+spring+adjusttble end cap. striker made with a solid steel core, them covered with epoxy to match the same id as the 1/2 tube, because I need it to be relativelly air tight for semi/full auto. you could use anything you want that workes
striker+spring+adjusttble end cap. striker made with a solid steel core, them covered with epoxy to match the same id as the 1/2 tube, because I need it to be relativelly air tight for semi/full auto. you could use anything you want that workes
epoxy them, it should looks like this
epoxy them, it should looks like this
cut some 1/2 tube, lenth depende the spring you are going to use. and cut 6 grooves so it fits on the end cap of the blowgun
cut some 1/2 tube, lenth depende the spring you are going to use. and cut 6 grooves so it fits on the end cap of the blowgun
IMG159.jpg (36.6 KiB) Viewed 22941 times
painted
painted
finished trigger
finished trigger
finished :D still needs a paint job and some fiberglass retouch
finished :D still needs a paint job and some fiberglass retouch
Last edited by wyz2285 on Fri Jan 04, 2013 10:53 am, edited 5 times in total.
CpTn_lAw wrote: :D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
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wyz2285
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Sat Aug 27, 2011 10:32 am

done, but without chamber, barrel and stock because these are custom partes that depends everybody´s needs :) but if anybody want I can post these partes too.
CpTn_lAw wrote: :D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
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clemsonguy1125
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Sat Aug 27, 2011 11:40 am

Nice How-To, how is the power at 150 PSI on your gun? The flow looks low since it is a blowgun though. How is it?
That is all.
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wyz2285
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Sat Aug 27, 2011 2:50 pm

The flow is pretty good actually 8)
sorry this is not designed to use with less than 300 psi :(
CpTn_lAw wrote: :D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
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Sat Aug 27, 2011 4:54 pm

wyz2285 wrote:IMG139.jpg
Description:
the output hoe
Filesize: 52.57 KB
Viewed: 4 Time(s)


Haha I am not sure I did this right but i had to point this out :lol:
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Sat Aug 27, 2011 5:24 pm

Nice, this is gonna help me with my hammer valve.
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Sun Aug 28, 2011 12:04 am

Nicely done, a good example of what you can achieve with some creativity and lots of epox :) kudos!
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wyz2285
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Sun Aug 28, 2011 4:38 am

Haha I am not sure I did this right but i had to point this out
sorry editing right now :D

@jack epoxy are good stuff :D , I find out that at 60 degree celsius the epoxy cures really nicely :P , it took only 5h instead of 3 days( says on the label of the epoxy).
CpTn_lAw wrote: :D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
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warhead052
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Sun Aug 28, 2011 9:55 am

Wait, so if I were to use 100 psi what would happen? Would it still work or would it just hold the blow gun open?
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jhalek90
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Sun Aug 28, 2011 6:49 pm

I built a VERY similar design(after reading this howto), the blow gun will only "stay open" if your hammer spring is to strong.

you can use a lower PSI, just dont replace the blowgun spring, and use a weaker hammer spring.

Btw, hammer valves are my new found favorite. you cant beat having multiple shots without a regulator! :roll:

On a side note, i found that the hammer spring/working pressure is quite touchy when trying to achieve full/semi auto. Doable, but touchy.

If your spring it to weak, or your pressure to great, your valve will fire once, and then "bounce" a few times. making sort of a "PHFT! phft! phhhft!" sounds.
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wyz2285
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Mon Aug 29, 2011 4:27 am

jhalek90 wrote:I built a VERY similar design(after reading this howto), the blow gun will only "stay open" if your hammer spring is to strong.

you can use a lower PSI, just dont replace the blowgun spring, and use a weaker hammer spring.

Btw, hammer valves are my new found favorite. you cant beat having multiple shots without a regulator! :roll:

On a side note, i found that the hammer spring/working pressure is quite touchy when trying to achieve full/semi auto. Doable, but touchy.

If your spring it to weak, or your pressure to great, your valve will fire once, and then "bounce" a few times. making sort of a "PHFT! phft! phhhft!" sounds.
Aha :wink: , good for you. Forgot to mention, yes if you could get only 100 psi, use a weak blowgun, so it will stay open for more time :) , but as I was looking for a pcp airgun´s power I use a stronger blowgun to hold more pressure. And it is a good way to make multi-shot, even through not easy for semi or full auto :roll:
finished product :D
Attachments
IMG197.jpg
CpTn_lAw wrote: :D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
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Mon Aug 29, 2011 2:32 pm

It looks like something out of a stengun..or some other WWII resistance contraption..

Cool trigger set up!
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Oh my friggin god stop being so awesome, that thing is pure kick ass. Most innovative and creative pneumatic that the files have ever come by!

Can't ask for a better compliment!!
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Major Collins
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Sun Oct 30, 2011 6:01 am

nice set up , with the video of the completed gun you said you get 8 shots per fill , how much psi is in a fill?
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wyz2285
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Sun Oct 30, 2011 6:23 am

400 psi, says in the video
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sagthegreat
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Mon Mar 05, 2012 7:19 pm

I still dont get how this works (Was A Noob, Still a noob)
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