Working principle and main features of V-cone flowmeter

V-cone flowmeter is a commonly used flow measurement instrument. It uses the throttling effect of the V-cone in the flow field to measure the flow by detecting the upstream and downstream pressure difference. Compared with ordinary throttling parts, it changes the throttling layout from center hole throttling to annular throttling. Today we mainly introduce the working principle and main features of V-cone flowmeter, hoping to help everyone.

Working principle of V-cone flowmeter

The V-cone flowmeter is a new type of differential pressure flowmeter with high precision and high stability. Like other differential pressure instruments, it is also based on the principle of flow continuity and Bernoulli's equation to calculate the working flow of the fluid. We know that in the same closed pipeline, when the pressure decreases, the velocity will increase. When the medium approaches the cone, its pressure is P+. When the medium passes through the throttling area of ​​the cone, the velocity will increase and the pressure will decrease to P-. As shown in Figure 1, P+ and P- are both led to the differential pressure transmitter through the pressure tapping port of the V-cone flowmeter. When the flow rate changes, the differential pressure value will increase or decrease accordingly. That is to say, for a stable fluid, the flow rate is proportional to the square root of the differential pressure. When the flow rate is the same, the larger the cone throttling area, the greater the differential pressure value generated.

Main features of V-cone flowmeter

1. V-cone flowmeter is a new type of flowmeter with high precision, high stability, wide range ratio and wide measurable media.

V-cone flow meter

2. Measurable media include liquids, gases, steam, etc., covering almost all flowing media.

3. The maximum operating temperature of the fluid can reach 800℃, and the maximum pressure can reach 10.5Mpa.

4. If a meter body made of special materials is used, the working temperature and pressure of the medium can be even higher.

5. The V-cone flowmeter can measure the highest Reynolds number of 5 million and the lowest Reynolds number of 8000 or even lower.

6. Generate full-scale differential pressure signals ranging from a minimum of less than 0.1 kPa to a maximum of tens of kPa.