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The relationship between the diameter of an electric regulating valve and its flow rate and velocity
Release time:
2021-11-08
ElectricControl ValveThe flow rate and flow rate mainly depend on the diameter of the electric control valve, and are also related to the resistance of the medium to the structure of the electric control valve, and are related to the pressure, temperature and concentration of the medium of the electric control valve.
The flow area of the electric control valve is directly related to the flow rate and flow rate, and the flow rate and flow rate are two interdependent quantities. When the flow rate is constant, if the flow rate is large, the flow area can be smaller; if the flow rate is small, the flow area can be larger. Conversely, if the area of the impeller is large, its speed is small; if the flow area is small, the flow rate is large.
For a high-speed medium, the diameter of the electric control valve can be smaller, but the resistance loss is large, and the electric control valve is easy to be damaged. If the flow rate is high, it will generate electrostatic action on flammable and explosive media, which is risky; if the flow rate is too small, the efficiency is low and uneconomical. For high-viscosity and explosive media, the flow rate should be smaller, and high-viscosity liquids should choose a high-viscosity flow rate, usually 0.1 ~ 2m/s.
Normally, the flow rate is known, and the flow rate can be confirmed by experience, and the nominal diameter of the electric control valve can be calculated after the flow rate and flow rate.
Electric control valves with the same diameter and different structural types have different fluid resistance. Under the same conditions, the greater the resistance coefficient of the valve, the greater the decrease in fluid flow rate and flow rate through the valve; the smaller the resistance coefficient of the valve, the smaller the decrease in fluid velocity and flow rate through the valve.
The selection of valve Size should consider the processing accuracy and Size deviation of the valve, as well as the influence of other factors. The tolerance of valve Size is usually 15%. In theoretical work, the Size of the valve depends on the Size of the process pipeline.
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