ZY-WG bend tube flowmeter

One product overview
ZY-WG bend tube flowmeter is installed at natural bends or horizontal straight pipes in industrial pipelines, with no additional pressure loss and good measurement repeatability. It is suitable for complex fluid conditions such as low working pressure, high medium temperature, dirty medium, strong mechanical vibration, and high flow rate.
II Product principle
When a fluid flows through a pipeline at a certain temperature and pressure, it will undergo corresponding circular rotational motion when it turns. According to the theory of forced swirling of fluids, the circular motion of fluids in pipelines is similar to the circular motion of solids in a spatial state. Therefore, fluids will inevitably generate inertial centrifugal force, and the magnitude of this centrifugal force is related to factors such as fluid velocity, fluid density, and the curvature radius of the circular motion (i.e., the curvature radius of the bend sensor).
Due to the known curvature radius of the bend tube sensor, the fluid density flowing through the bend tube sensor can be accurately determined using the host computer by measuring parameters such as temperature and pressure of the fluid. Therefore, the magnitude of the centrifugal force generated on the bend tube sensor is only a function of the fluid flow velocity. As long as the magnitude of centrifugal force is measured, the flow velocity of the fluid in the pipeline can be determined. The flow rate of the fluid can be calculated by multiplying the flow velocity by the cross-sectional area of the pipeline and the density of the fluid. The calculation relationship is as follows:
Equation ① provides the functional expression of the average flow velocity and differential pressure value of the fluid flowing through the bent pipe:
V=a[（P1-P2）/ρ]β--------①
Among them: V - the average flow velocity of the fluid;
A - Comprehensive flow coefficient, a=f (bend to diameter ratio, Reynolds number, medium dynamic viscosity, pipeline roughness, etc.), among which the influence of bend to diameter ratio is particularly important:
P1-P2- Pressure difference between the inner and outer sides of the bent pipe;
ρ - density of fluid;
β - index;
By calculating the average flow velocity V, the function expression for calculating the flow rate can be obtained:
Q=S*V*ρ-----------②
In the formula:
S - cross-sectional area of bent pipe;
V - the average flow velocity of the fluid; scope of application
1. Nominal diameter: 25mm ≤ DN ≤ 2000mm
2. Nominal pressure: PN ≤ 10MPa
3. Medium temperature: t ≤ 450 ℃ (t>450 ℃ to be notified upon ordering)
4. Reynolds number range: ReD>104
5. Accuracy level: Level 1, Level 1.5
6、 R/D≥1.25
III Product structure form
The primary sensing element of the bent pipe flowmeter - the bent pipe sensor is divided into the following three types according to the installation on the pipeline:
90 ° bend sensor - used at the 90 ° bend connection of process pipelines, replacing the original bend
180 ° bend pipe sensor - used on straight pipe lines to replace some straight pipe sections
135 ° bend sensor - used at the 135 ° bend connection of process pipelines, replacing the original bend

The external structure of the 90 ℃ bent pipe is shown in the following figure:

The external structure of the 180 ℃ bend pipe is shown in the following figure:

The external structure of the 135 ℃ bend pipe is shown in the following figure:

System composition of bend tube flowmeter
1. Composition of bend flow meter system for measuring gas, air, etc
The commonly used system composition is shown in the following figure: (Installation diagram is installed vertically, with positive pressure measurement on top)

2. Composition of steam elbow flowmeter system for measurement
The commonly used system composition is shown in the following figure: (The installation diagram is vertically installed, with negative pressure measurement on top)

3. Composition of liquid bend tube flowmeter system for measurement
The commonly used system components are shown in the following figure: (Installation diagram is installed horizontally)

4 Product Selection