Control valves

Control Valve Flow Characteristics:

  1. Equal Percentage Opening
  2. Linear Opening
  3. Quick Opening.

1.Equal Percentage Opening:

Flow capacity increases exponentially with valve trim travel. Equal increments of valve travel produce equal percentage changes in the existing Cv.

2. Linear Opening:

Flow capacity increases with valve travel.

3. Quick Opening:

Produce large changes in the flow with small changes in the lift. It is limited to on/off service,