PeteS wrote:I figure it will be an excuse to test a Orbit 1" jar top to failure and I had some of the parts around. Anyone know what kind of plastic the Orbit valves are made of and how they are likely to fail? Is shattering likely of are they more likely to just split?
Plan for the worse, assume it will shatter.
I will either remotely pump and fire it or build a shatter shield around the valve.
I would pressurise it remotely and construct a cardboard structure to record the path and energy of any high velocity fragments.
My guess is that the diaphragm will fail before the valve cracks or explodes, but that is just a guess. If I am right, I'll either make a custom diaphragm or a piston after the oem diaphragm fails.
Some diaphragms are reinforced, it might not happen. You could also cap the barrel if you want to see the valve body fail.
If my AC pump won't blow one up I'll stop at the max pressure it develops (somewhere a bit above 400 psi).
In an unmodded valve, the solenoid might not be able to take the pressure and pop, thus piloting the valve.
If 400 psi doesn't kill it, you could always go all mythbusters on its proverbial posterior and hook it up to a hybrid chamber