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how safe is this thing??

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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Unread postAuthor: jimmy101 » Sun Jun 22, 2008 3:10 pm

To help convince yourself that the gun is OK to 100 (or 120) PSIG you can hydro-test it.

Fill completely with water then pressurize with air (water would be better for pressurization but most people don't have access to a 100+ PSIG water source).

Let sit, smack it a few times, jiggle it ... in a safe way of course. If it does rupture when filled with water, there is very little energy stored in the gun.

And, any leaks are easy to find.
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Unread postAuthor: airsofter135 » Tue Jun 24, 2008 11:15 pm

has anybody tested or know what the pressure rating for orbit sprinkler valve?
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Unread postAuthor: MrCrowley » Tue Jun 24, 2008 11:17 pm

The rating is about 125psi if I recall correctly. It wouldn't be much higher or lower then that.
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Unread postAuthor: jimmy101 » Wed Jun 25, 2008 2:04 pm

The problem with a sprinkler valves pressure rating is that it is probably the pressure where it starts to leak, not it's (catastrophic) failure pressure.

For potable water systems (i.e., lawn sprinkler systems), things are usually designed for at least 125 PSIG (twice the nominal water supply pressure of ~60 PSIG).
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