Control Valve Characteristics: ball_segmented to rotary_eccentric_plug
Control valve inherent flow characteristics and ISA-75.01 sizing factors — FL, Xt, Fd, rangeability, and inherent characteristic (equal percentage / linear / quick-opening) for globe, butterfly, ball, and rotary control valve types
| valve type | FL (dimensionless) | Fd (dimensionless) | Xt (dimensionless) | inherent characteristic | notes | rangeability (dimensionless) |
|---|---|---|---|---|---|---|
| ball_segmented | 0.6 | 0.98 | 0.4 | equal_percentage | Segmented (V-notch) ball valve; excellent rangeability 100:1; good for slurries and viscous fluids. FL=0.55-0.65; Xt=0.35-0.45; Fd~1.0. Equal pct inherent char. | 100 |
| ball_full_bore | 0.55 | 1 | 0.25 | linear | Full-bore (full-port) ball valve; poor control characteristic; mainly on/off service. FL=0.50-0.60. Very low Xt. Rangeability <10:1 when used for throttling. | 10 |
| rotary_eccentric_plug | 0.85 | 0.42 | 0.63 | equal_percentage | Rotary eccentric plug (e.g. Fisher Camflex); excellent shutoff; FL=0.80-0.90; Xt=0.60-0.70; Fd=0.40-0.45. Rangeability 50:1. Good cavitation resistance. | 50 |
This is a sample. Search the full control valve characteristics dataset and 300+ more by creating a free account and accessing the database.
Get started for FREE