Inlet Sizes : 3/4″ through 8″
Ratings : ANSI Class 150 to 2500
Materials : Carbon steel body , Stainless steel chrome moly
Actuators : Model 87/88 Multi-Spring Diaphragm; Cylinder
Trim : Single seat plug top guided; Lo-dB and anti-cavitation trims, single or double stage are
Inherent Characteristics : Linear or Equal percentage
Description : The 21000 Series control valve is a heavy top-guided unbalanced design with noise attenuation and anti-cavitation trim options.
Source : http://www.geoilandgas.com/pipeline-storage/gas-production/globe-control-valves
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