Can the ANSI/FCI 70.2 (IEC 60534-4) control valve seat leakage classes be applied to ball valves?

I need a valve for controlling the flow of drilling cuttings. I can't use a ball valve cause it will block up with drilling cuttings.

Ball valves fail because the seat "extrudes" when we close the valve on 150# saturated steam service. When closing the valve, the ball lip graps part of the seat and deforms seat, not letting valve c

In a pressure relief with a set point at 50 psig and I was looking at using a rupture disk as an alternative to a spring seated design.

I have a 25mm (1") pinch valve on a lime slurry (milk of lime) pnematically actuated with a full-on, full-off operation.

I am trying to locate a manufacturer(s) of excess flow falves for hazardous liquid service. The valves we currently are using are 3" 300#RF flanged valves manufactured by Guardian.

Rising stem ball valves for some applications. These are hard to come by and only manufactured by a very, very limited number of companies.

We have a 3 piece ball valve 48" Class 300. Noticed that when bolted together the straddle of the centerline is about 1/2degree off.