Linear Valve Characteristics at Cynthia Fortunato blog

Linear Valve Characteristics. Selecting a valve with the correct flow characteristic (the relationship between valve opening and flow capacity) can be as important. The valve characteristic represents how the flow rate through a valve changes with valve position. Why have such a valve? In general, linear valves are. The idealized valve equation is: Consider a linear (valve characteristic 𝑓𝑥)=𝑥, the middle line in figure 2. Desirably, for normal use, we want the characteristic to be linear (figure 1), a constant gain, so that controller tuning at one flow rate is acceptable for all flow rates. This characteristic provides a linear relationship between the valve position and the flowrate. Equal increments of valve travel. Note that the valve model of equation (1). “linear” valve trim exhibits a fairly proportional relationship. The two most common inherent characteristics are linear and equal percentage. This section will consider the various options of valve characteristics for controlling water and steam systems. The flow through a linear valve varies directly with the position of the valve stem.

The valve characteristic represents how the flow rate through a valve changes with valve position. The flow through a linear valve varies directly with the position of the valve stem. Equal increments of valve travel. The idealized valve equation is: “linear” valve trim exhibits a fairly proportional relationship. Desirably, for normal use, we want the characteristic to be linear (figure 1), a constant gain, so that controller tuning at one flow rate is acceptable for all flow rates. Consider a linear (valve characteristic 𝑓𝑥)=𝑥, the middle line in figure 2. The two most common inherent characteristics are linear and equal percentage. Note that the valve model of equation (1). Selecting a valve with the correct flow characteristic (the relationship between valve opening and flow capacity) can be as important.

Why Do Different Control Valves Have Different Characteristics? THINKTANK

Linear Valve Characteristics Equal increments of valve travel. The idealized valve equation is: The two most common inherent characteristics are linear and equal percentage. This characteristic provides a linear relationship between the valve position and the flowrate. Consider a linear (valve characteristic 𝑓𝑥)=𝑥, the middle line in figure 2. “linear” valve trim exhibits a fairly proportional relationship. Note that the valve model of equation (1). Selecting a valve with the correct flow characteristic (the relationship between valve opening and flow capacity) can be as important. Equal increments of valve travel. The flow through a linear valve varies directly with the position of the valve stem. Why have such a valve? Desirably, for normal use, we want the characteristic to be linear (figure 1), a constant gain, so that controller tuning at one flow rate is acceptable for all flow rates. The valve characteristic represents how the flow rate through a valve changes with valve position. This section will consider the various options of valve characteristics for controlling water and steam systems. In general, linear valves are.