Anyone know how much pressure it takes to trip the MPA-3 that people use in thei Pneumag conversions? Is it under 100 psi?
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The answer is in this post, its to late right now but i'll be going through that thread looking for the answer tomorrow, but I remember reading it before just forgot the actual numbers, but I do know this.. he uses the ULT and was able to use 40 psi to push the sear with the mpa-3, but he runs it at 80 psi to be safe..
I know that electrician runs it at less then that but has his mpa-3 placed differently and I'm not sure what on/off he uses. -
Originally posted by temps
Thanks for the info. The reason im asking, is that I saw this Solenoid on the Air Soldier website and now the wheels in my brain are turning.
(insert evil, maniacal laughter here)Comment
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Ok went through the post and pulled out the numbers
if you are using the MPA-3 with the return spring in it, and an RT(X valve) on/off and lvl10 you should be able to run the lpr at 50 psi. now the ULT will make it possible to go even lower, but it will also reduce max bps. probably wouldn't matter in an X-valve though.So yeah.. takes alot less psi then I thought it would neednow the MPA-3 is a air pilot mechanical valve actuator. I used it as a "ram" by making a steel pin to fit inside it to push the sear. it has a 3/8" bore. that's a power factor of .11 . that means at 100 psi it generates 11 lbs of force.(5.5 lbs. at 50 psi) that is not quite twice what you need to operate a classic valve with a stock classic on/off. I run mine at 50 psi with an RT on/off. that's plenty of power. that's why I designed my set-up this way. Happy Modding 
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Thats great info. THanks for finding it for me. :-)
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