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Product Introduction
Detailed Overview:
Gas pipeline V-cone flowmeter is a new type of high-precision flowmeter that can measure various Reynolds numbers. It can meet the application requirements of various media. Its operating principle is the same as other types of differential pressure principles, both based on the principle of energy conservation in sealed pipelines. Due to its unique design structure, the conical flowmeter has better performance. The V-cone flowmeter is a conical throttling device suspended at the center of the pipeline, which obstructs the flow of the medium and reshapes the velocity curve. A low-pressure zone can be immediately formed downstream of the conical shape. There is a differential pressure between the positive pressure upstream of the pipeline and the negative pressure downstream after throttling by the throttling device. The positive and negative pressures are taken out using a pressure tap, with the positive pressure tap located upstream of the pipeline and the negative pressure tap located at the end of the cone. By measuring the differential pressure between the two, the flow rate in the pipeline can be calculated according to the Bernoulli equation. The cone is located at the center of the pipeline, which can optimize the velocity curve of the measured medium, resulting in high measurement accuracy.
Function description of V-cone flowmeter for gas pipeline:
High precision:+-0.5%. When customizing a V-cone with β<0.55, the high precision can reach+-0.1%
Good repeatability: 0.1%
◆ Low long-term pressure loss: only 1/3 to 1/2 of the orifice plate
Stable output differential pressure: The negative pressure end of the V-cone tail has small fluctuations
Low measurement limit: output differential pressure * small value of 25Pa
◆ Wide range ratio: up to 10:1-50:1
◆ Equipped with self rectification function: capable of measuring mixed phase flow
◆ Self cleaning function: no debris retention, suitable for measuring dirty flow
◆ Good long-term stability: The fluid is gradually contracted to the inner wall of the pipeline, resulting in minimal wear on the V-cone
◆ Measurable high temperature fluid:<600 ℃, it is difficult for other flow meters to measure such high temperature fluids
Characteristics of V-cone flowmeter for gas pipeline:
The V-cone flowmeter significantly improves the limitations of traditional differential pressure flowmeters, enhancing their accuracy and repeatability
During installation, there are almost no requirements for straight pipe sections. It has a self-cleaning function and is suitable for dirty media that are prone to scaling. The gas-liquid measurement is a throttling device that is close to the ideal state.
The front and rear straight pipe sections are required to be relatively short, generally only 0 to 3D upstream and 0 to 1D downstream.
High precision, differential pressure output value can achieve repeatability of ± 0.1%, with small pressure loss, only 1/2-1/3 of the orifice plate.
The vortex generated at the rear edge of the V-cone is small, the differential pressure output is stable, and the fluctuation is small
The V-cone is subjected to fluid erosion and there is no debris retention.
Technical parameters of V-cone flowmeter for gas pipeline:
Measurement medium: liquid, gas, steam
◆ Nominal meridian: DN6mm to DN2000mm
◆ Nominal pressure: ≤ 16MPa; *Large ≤ 42.0MPa
Working temperature: -40 ℃~600 ℃
◆ Environmental temperature: -40 ℃~60 ℃
Relative humidity: 5% to 90%
◆ Flow meter * * degree: ± 0.5%, ± 1.0%, ± 1.5%
◆ Repeatability: 0.15%, 0.33%, 0.5%
Range ratio: 10:1
◆ Suitable Reynolds number: 8000~1 × 107
Structural form: flange connection type, clamp type, special (according to user requirements)
Installation of straight pipe section length: generally 1-3D upstream and 0.5-1D downstream
◆ Material: Carbon steel SUS304、SUS316L、 other
◆ Flow direction: horizontal, vertical, other
Equivalent diameter ratio: 0.45-0.85
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