Confused about the sprinkler valves

[TfAv1228]

i dont do much unless i know exactly why and how something works and this sprinkler thing is confusing me why when u vent some air it opens the valve? and when u release the blowgun does the valve close itself? and i have a blowgun with a red thing on the "trigger" and i hook thing on the handle it says caution 90psi max and i was wondering cause ive heard that some say 30 but u can push it past 120 if i should be able to push mine?

thanks

[TalonXxX]

A sprinkler valve has a diaphram with a hole called an equilization port. The diaphram separates the sprinkler valve into 3 sections. The section connected to your chamber, the section connected to your barrel and the top section of the sprinkler valve. Air enters one end of the sprinkler valve and is able to fill the top section via the equilization port. Now you have equal pressure on both sides of the diaphram. With a blowgun attached to the top of the sprinkler valve, you evacuate the air (and pressure) above the diaphram and this causes the air pressure under the diaphram to push the diaphram upwards allowing air to move from the chamber to your barrel. That's pretty much all that's to it.

I have that same blowgun and I have run ~120psi through it... so I kinda just ignore that sticker Just make sure you remove that 1/8" attachment on the bottom of the blowgun

[TfAv1228]

sweet thanks for the description i figured it was somethin like that. so when you release the blowgun the diaphram refills and the valve is closed? its basically like having a baloon covering a hole then poping it and it releases the pressure?

[boilingleadbath]

Go look up "diaphram valve" in the spudwiki, then report back if you still have a question.