Inlet Sizes : 1″ through 12″
Ratings : ANSI Class 150 to 300
Materials : Carbon steel body, Stainless steel
Actuators : Model 33 spring diaphragm Model 31/32 spring diaphragm
Trim : Dual characterized V-Ported segmented ball
Inherent Characteristics : Equal Percentage
Description : High capacity design, equal percentage flow characteristic and high turndown ratio for accurate throttling control over a wider range of flow conditions.
Source : http://www.geoilandgas.com/distributed-gas/production/rotary-control-valves