The flow characteristics of the valve?

The flow characteristics of valves mainly include linear, equal percentage (logarithmic), parabolic, and quick-open types. The linear characteristic means that the relative flow rate of the valve is directly proportional to its relative opening degree; in other words, the change in flow rate resulting from a unit change in opening degree is constant. The logarithmic characteristic means that a change in the valve opening by one unit results in a relative flow change that is proportional to the relative flow at that point; in other words, the amplification factor of the control valve varies, increasing as the relative flow increases. The parabolic characteristic refers to the fact that the change in relative flow rate resulting from a unit change in relative opening is proportional to the square root of the relative flow rate value at that point. The fast-opening flow characteristic refers to a situation where a large flow rate is achieved at a small opening degree; as the opening degree increases, the flow rate quickly reaches its maximum value, and further increases in the opening degree result in only minimal changes in flow rate, which is why it is called a fast-opening characteristic. The flow characteristic of diaphragm valves is close to that of quick-opening valves; the flow characteristic of butterfly valves is close to that of equal percentage valves. The flow characteristic of gate valves is linear, while that of ball valves is linear during the stages of partial opening and closing, and equal percentage at intermediate opening degrees. Do you understand now?

Got it. Friend, could you point out the most commonly used valves again? What are the flow characteristics of globe valves? Thank you! This characteristic is probably mainly determined by the structure of the valve core, right?