Overview

The V-cone flowmeter measures flow using the throttling effect. Compared to other forms of throttling devices, it changes the throttling layout from traditional central hole throttling to annular throttling. The V-cone uses a streamlined conical body suspended in the center of the pipeline to gradually contract the fluid to the inner wall of the pipeline, giving it self-straightening, self-cleaning, and self-protecting characteristics. It can measure media including liquids, gases, steam, etc., covering almost all flowing media.

Working Principle

The V-cone flowmeter calculates the flow of fluid conditions based on the principle of flow continuity and Bernoulli's equation. In the same closed pipeline, when pressure decreases, velocity increases. When the medium approaches the cone, its pressure is PH. As the medium passes through the throttling area of the cone, its velocity increases and pressure decreases to PL. As shown in the figure below, both PH and PL are led to the differential pressure transmitter through the pressure tapping points of the V-cone flowmeter. When the flow rate changes, the differential pressure value will increase or decrease accordingly.

Features

◆ Uniform velocity effect on fluid, stable signal, short straight pipe section required for installation;

◆ High accuracy ±0.5%, good repeatability ±0.1%, wide range ratio 10:1;

◆ Wear-resistant, with long-term stability and accuracy, no need for repeated calibration;

◆ Self-cleaning function, dirty fluids will not clog;

◆ The sensor has no electronic components, resistant to high temperatures and vibrations;

◆ Applicable fluids are very wide, diameter: DN15～DN2000;

◆ Low pressure loss, about 1/3 of that of an orifice plate;

◆ Installation methods: flange type, welded type, etc.

Model Representation Method

Nominal Pressure Representation Method

Nominal Diameter Representation Method

For pipe diameters greater than 1000mm, represented as 1/10 of the actual pipe diameter

Technical Parameters

Measured Fluid

◆ Steam: saturated steam, superheated steam

◆ Gas

• Coal gas: coke oven gas, blast furnace gas, city gas

• Natural gas: including natural gas with a moisture content of more than 5%

• Various hydrocarbon gases: alkanes, alkenes and other gases

• Various gas manufacturing: hydrogen, helium, argon, oxygen, nitrogen etc.

• Corrosive gases: wet chloride gases etc.

• Air: including humid air with dust, compressed air etc.

• Flue gas: flue gas emitted from various boilers and heating furnaces

◆ Liquid

• Oils: crude oil, fuel oil, water-containing emulsion oil, diesel oil, hydraulic oil etc.

• Water: raw water, drinking water, production water, sewage etc.

• Various aqueous solutions: acid, alkali, saline solutions etc.

• Organic chemical products: methanol, ethylene glycol, xylene etc.

◆ Special Fluids

• Oil + HC gas + sand

• Gassed water: H2O + N2 + air; H2O + CO2 etc.

◆ Nominal Diameter: DN15-DN2000

◆ Temperature Range: -200℃-500℃

◆ Pressure Level: 1.0MPa-10MPa

◆ Accuracy Level: Grade 0.5—1.5

◆ Material: Cone material is stainless steel (others supplied as per agreement)

◆ β value range: 0.45—0.85