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My Pneumatic Thoughts

Rumblings from my head on what to look for and some other random things.  If you are looking for good beginner, how does stuff type info, then click on the button below as I don't need to re-write that book.

Ultimate Thread on Pneumatics

Solenoid Valves

9/23/2015

0 Comments

 
I am not going to hash over the details and operation of valves, whether you need 120, 24, 12 volt, etc.  Skeletal Remains tutorial http://www.halloweenforum.com/tutorials-and-step-by-step/77731-beginners-guide-props-pneumatics.html has good information on the different valves and using controllers to control them.  May have to track down a motion detector hack for 120 volt solenoids.  The fore mentioned tutorial doesn't have much on speed controls, but Fright Props does have a tutorial on that, http://www.frightprops.com/faq/content/2/66/en/controlling-the-speed-of-a-cylinder.html

I typically buy 5 port, 4 way valves with 1/4" NPT input and output ports.  The exhaust ports are generally 1/8" NPT.  For the most part, I tend to buy off ebay again as can get them from China with shipping for about $10 - $12 each.
  • Getting 1/4" NPT input and output ports will ensure the valve should be plenty large and flow air well for even larger air cylinders.  1/8" NPT ports are generally fine, but have run into small smaller valves that worked fine for smaller air cylinders, but too restrictive for bigger cylinders.  This is defined by the valve's Cv value, and you can research that if you wish
  • Need a 3 way valve?  4 way valves can be made into 3 way versions by plugging one of the output ports
  • Need a 2 way valve?  Less likely for our applications, unless making an "ankle tickler" or an "air cannon".  If making an air cannon, you will likely be using a sprinkler valve to flow a lot more air, or looking at a valve with 1/2" or larger ports
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    Wes Bourn

    I got into pneumatic Halloween props back around 2005, but had played with higher pressure pneumatics for fighting robots in 2003

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