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Shenyang Taike Fluid Control Co.,Ltd

Relationship Between Valve Diameter And Medium Flow Rate

Valve flow and flow rate depends mainly on the valve diameter, but also with the valve structure of the resistance of the medium, while the valve pressure, temperature and medium concentration and other factors have a certain intrinsic link.


Valve flow area and flow rate, flow has a direct relationship, and the flow rate and flow are interdependent two quantities. When the flow rate is certain, the flow rate is large, the flow area can be smaller; flow rate is small, the flow area can be larger. On the contrary, large flow area, the flow rate is small; flow area is small, the flow rate.


Medium flow rate, the valve diameter can be smaller, but the resistance loss is large, the valve is easily damaged. Large flow rate, the electrostatic effect on the flammable and explosive medium, resulting in danger; flow rate is too small, inefficient, uneconomical. For high viscosity and explosive media, should take a smaller flow rate. Oil and viscosity of the liquid viscosity with the size of the selected flow rate, generally take 0.1 ~ 2m / s.


In general, the flow rate is known and the flow rate can be empirically determined. Through the flow rate and flow can calculate the valve nominal diameter.


The same valve diameter, the structure of different types of fluid resistance is not the same. Under the same conditions, the greater the resistance coefficient of the valve, the more the flow rate of the fluid passes through the valve, and the more the flow rate decreases. The smaller the valve drag coefficient is, the smaller the flow rate of the fluid passing through the valve is and the less the flow rate decreases.


The choice of valve diameter, valve should take into account the accuracy and size of the deviation, and other factors. Valve diameter should have a certain amount of wealth, usually 15%. In the actual work, the valve diameter with the process pipeline path may be.

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