Looking for a source for a ball valve (class 150 flanged, metal body, pTFE seats) with an unusual shaped ball. Instead of being a constant diameter sphere, the ball has two recessed circular areas located 90 degreees to the ball bore.
In the closed position - the exposed upstream and downstream surface of the ball has a slightly smaller spherical diameter than the rest of the ball. I think one purported benefit was reduced operating torque because of less contact area between the ball and seats while being rotated.
two valve manufacturers which make a Ball valve similar to your description.
Jarecki Valve's Phantom Port Ball valve (Floating design) and Newmans-Newco Valve's QuadroSphere Ball Valve (Trunnion design).
Check for "Cam-Tite" top entry ball valve, was FCX think it is now Cameron owned.

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