What are the control valve flow characteristics?


Control Valve Flow Characteristics

Linear -
Flow is directly proportional to lift at constant pressure drop.

Equal Percentage -
Flow changes by a constant percentage of its instantaneous value for each unit change lift.

Modified Flow-
Combination of linear and equal percentage.

Quick Opening-
Flow increases rapidly in a linear relationship with plug lift reaching a max.value at a low lift On-Off service.

Control Valve Flow Characteristics