Our goal: to be a high-quality manufacturer of industrial control valves, gaining unanimous recognition from new and old customers
Our mission: To fully utilize the effectiveness of industrial control valves to achieve better results
Electric control valve is an important executive unit instrument in industrial automation process control. With the improvement of automation in the industrial field, electric control valves are increasingly used in various industrial production fields. Electric regulating valves typically include a driver that receives driver signals (0-10V or 4-20MA) to control the valve for regulation. It can also form intelligent network control systems based on control requirements to optimize control and achieve remote monitoring.
The flow characteristics of electric control valves include linear characteristics, equal percentage characteristics, and parabolic characteristics:
(1) Equal percentage characteristic (logarithmic) The relative stroke and relative flow rate of the equal percentage characteristic are not linear. At each point of the stroke, the change in flow rate caused by a change in unit stroke is proportional to the flow rate at that point, and the percentage change in flow rate is equal. Therefore, its advantage lies in that when the flow rate is small, the flow rate changes slightly, while when the flow rate is large, the flow rate changes greatly, that is, under different opening degrees, its adjustment accuracy is the same.
(2) Linear characteristic The relative stroke and relative flow rate of a linear characteristic have a linear relationship. The change in flow rate caused by a change in unit stroke is constant. When the flow rate is large, the relative value of the flow rate changes little, while when the flow rate is small, the relative value of the flow rate changes greatly.
(3) The parabolic characteristic flow rate varies proportionally to both sides of the stroke and typically has an intermediate characteristic of linear and equal percentage characteristics. From the analysis of the above three characteristics, it can be seen that in terms of its regulation performance, the equal percentage characteristic is correct, and its regulation is stable and its regulation performance is good. Parabolic characteristics are superior to linear characteristics. You can choose any flow characteristic based on application requirements.
