Yesterday, a customer called to inquire about purchasing a vortex flowmeter for measuring compressed air and steam media. The temperature is around -40~200 degrees Celsius, and the caliber includes DN200, DN150, DN100, DN80, DB50, etc. It requires temperature and pressure compensation. The accumulator is configured as a liquid crystal flow accumulator with 220V power supply, 4-20mA output, RS485 communication, a total of dozens of units. After reviewing the parameter table sent by the customer and confirming the working conditions over the phone, we decided to provide separate quotations with temperature and pressure compensation for the customer. The customer accepted the quotation and will discuss contract signing with us this morning.

Today we will talk about the difference between vortex flowmeter with temperature and pressure compensation integrated and split type?

The vortex flowmeter is designed based on the Karman vortex principle and is mainly used to measure gas, steam, or liquid flow rates. It is widely used in industrial production, energy metering, and other fields. It has high precision, wide range, good stability, strong adaptability, diverse output signals, and can be easily integrated into automation control systems.

This product utilizes the principle of natural fluid oscillation to measure flow rate. When a fluid flows at a sufficiently high velocity through an object perpendicular to its flow direction (such as a triangular cylinder vortex generator), if the geometric dimensions of the object are appropriate, a neatly arranged and opposite turning vortex column will be generated behind the object along two parallel straight lines. The number of these vortex columns, i.e. vortex street frequency, is directly proportional to the flow velocity of the fluid. By measuring the frequency of the vortex, the flow velocity of the fluid can be calculated, and then the flow rate of the fluid can be determined.

Advantages of this product:

Firstly, vortex flowmeter: high accuracy and wide range

Vortex flowmeter has the characteristics of high precision and wide range. Its measurement accuracy is high, with a relative deviation between ± 1% and 1.5%, and a large range. Under a reasonable aperture, the range can reach 20:1. This means that vortex flowmeters can accurately measure fluid flow rates at various flow rates and are suitable for a variety of operating conditions.

Secondly, vortex flowmeter: good stability and low maintenance

Vortex flowmeter has no movable mechanical parts, simple and sturdy structure, and easy installation and maintenance. Compared to other flow measurement devices, vortex flowmeters reduce leakage, blockage, and freezing phenomena, improving long-term operational stability. At the same time, its instrument parameters can remain stable for a long time, with minimal maintenance and reduced usage costs.

Thirdly, vortex flowmeter: highly adaptable

The vortex flowmeter can operate within a wide temperature range (-20 ℃~+250 ℃) and is suitable for fluid measurement under different temperature conditions. In addition, its measurement results are not affected by parameters such as fluid density, pressure, temperature, viscosity, etc., and it has high adaptability and accuracy in measuring volumetric flow rate under working conditions.

Fourth, vortex flowmeter: diverse signal outputs

Vortex flowmeter has analog standard signal and digital pulse signal output, which is easy to be used in conjunction with digital systems such as computers. This diversified signal output method enables the vortex flowmeter to be easily integrated into automation control systems, achieving remote monitoring and data acquisition.

Under what circumstances does a vortex flowmeter require temperature and pressure compensation? There are two types of temperature and pressure compensation: integrated and split. What is the difference between integrated and split?

There are several situations that require vortex flowmeters with temperature and pressure compensation:

Firstly, vortex flowmeter: When detecting superheated steam, it is usually settled based on mass flow rate and requires temperature and pressure compensation simultaneously. Due to changes in temperature or pressure, the density of steam will change, and the mass flow rate will also vary accordingly.

Secondly, vortex flowmeter: When detecting gases, it is usually settled based on standard volumetric flow rate, and temperature and pressure compensation are also required. When the volume flow rate, temperature or pressure of gas changes, the flow rate will undergo some changes.

Thirdly, vortex flowmeter: When detecting liquids, pressure compensation is usually not required. Below 5MPa, only temperature influence is usually considered, and temperature compensation is required for accurate detection. When detecting some hydrocarbons, temperature and pressure compensation are usually required simultaneously.

What is the difference between integrated and split type vortex flowmeter with temperature and pressure compensation?

Firstly, vortex flowmeter with integrated temperature and pressure compensation

Integrated compensation refers to the integration of information from multiple sensors such as temperature sensors, pressure sensors, and vortex street sensors to compensate together. This method can effectively reduce measurement errors and improve measurement accuracy. Integrated compensation is commonly used for vortex flowmeters with smaller diameters and measurement ranges.

Secondly, vortex flowmeter with temperature and pressure compensation split type

Split compensation refers to the collection of information from multiple sensors such as temperature sensors, pressure sensors, and vortex sensors, and then joint calculation through devices such as computers to obtain the final compensation value. This method can collect information from each sensor separately, avoiding mutual interference and improving measurement accuracy. Split compensation is commonly used for vortex flowmeters with larger diameters and wider measurement ranges.