You don’t need any of that chemical nonsense to just have fun, though, as this compressed air ... is achieved via a ball valve. Of course, if you build such an air cannon yourself, just be ...

One of the most common repairs for an air compressor is when the unloader valve stops working. Fortunately, it's also a ...

Such is the case with this 3D-printed compressed air engine ... The engine was simple, with a ball valve that admitted air into the cylinder when a spring mounted to the top of the piston popped ...