Control valve flow characteristics, is a constant pressure across the valve under conditions, relative medium flows through the valve flow and the relationship between its opening. Control valve flow characteristics are linear features, such as the percentage of properties and characteristics of the three parabolic. Following the significance of three flux characteristics: electric control valve
(1) the percentage of properties such as (log)
The relative percentage of properties such as stroke and not a linear relationship between the relative flow rate, resulting in the unit at each point on the itinerary itinerary changes the flow changes and this is proportional to the flow, the percentage change in flow rate are equal. So it has the advantage of traffic hours, traffic change is small, traffic flow, then the flow rate changes, which is different, have the same regulation accuracy. Pneumatic control valve
(2) linear characteristic (linear)
Linearity of the relative stroke and a linear relationship between the relative flow. Flow unit change in itinerary changes caused by the constant. Traffic flow, the flow of small changes in relative value, traffic hours, the flow variation in relative value.
(3) the parabolic characteristics
Flow changes in proportion to travel two party, intermediate characteristics generally linear and equal percentage characteristics. Dedecms.com
From the analysis of the three characteristics can be seen, the regulating valve performance perspective, as the percentage of properties such as optimal, the regulator stability, good regulation performance. The parabolic than linear characteristics of the regulation characteristic of good performance, according to applications requirements are different, select any of these flow characteristics.
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