Have anyone experience hollow ball ball valve? If it is hollow ball, is there any equation to calculate the wall thickness of the ball? The ball normally has a hollow cylinder for the fluid path. It is common for ball valves to have an internal diameter reduced one line size smaller than the end connections. The alternative is full port or full bore. The ball rotates to close thus shutoff the flow. Let me know if I am missing something from the question. There's no theoretical reason you couldn't make a hollow valve ball. If you're that severely weight- constrained, you might consider a butterfly valve instead.Given that nobody stocks ball valves like that, it's custom, and the wall can be as thin as you want it. ... remembering that you'll be paying for machining time.If you want to make it really thin, you need to consider the forces from the valve seats and the stem in addition to pressure considerations. Some seats apply a lot of force and/or expect the ball to not deflect much.

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