The difference between DY type and CD type vortex flowmeter

Vortex flowmeter is a commonly used flow measurement equipment in chemical, petroleum, natural gas and other industries. It is popular for its high precision, stability and strong anti-interference. In practical applications, users often encounter DY-type and CD-type vortex flowmeters. These two models have significant differences in structure, working principle and usage scenarios. This article will analyze the difference between DY type and CD type vortex flowmeter in detail, and help readers to better choose suitable equipment.

1. vortex flowmeter DY type and CD type working principle

Vortex flowmeter is based on the principle of fluid mechanics, which uses the vortex phenomenon generated when the fluid passes through the turbine to measure the flow. DY type and CD type vortex flowmeter are different in the way of realizing vortex phenomenon.

1. DY type vortex flowmeter working principle

The DY type vortex flowmeter adopts a twin-turbine structure, I .e. a turbine is arranged on each side of the measuring channel. As the fluid passes through the measurement channel, the blades of the turbine and the fluid move relative to each other, resulting in the generation of vortices. The vortex flow enters the measuring channel through the gap of the turbine blade, and finally forms a stable vortex pattern. This structure makes the DY flowmeter have good anti-interference and measurement accuracy, and is suitable for scenarios that require high measurement accuracy.

The main difference with the CD type is the working method: 2. The working principle of the CD type vortex flowmeter

The CD type vortex flowmeter adopts a single turbine structure, and the turbine is only arranged on one side of the measurement channel. When the fluid passes through the measurement channel, the vortex is generated in a similar way to the DY type, but the CD type flowmeter has a relatively simple structure, small volume and light weight. Due to the limitation of its structure, the performance of CD type flowmeter may not be as good as DY type flowmeter under anti-interference and complex working conditions.

2. Vortex Flowmeter DY Type and CD Type Structure and Technical Parameters

1. DY type vortex flowmeter main structure

The structure of DY type vortex flowmeter is relatively complex, mainly including measuring channel, double turbine assembly, driving mechanism, inductance coil and so on. The design of the twin-turbine makes the air-tightness and water-tightness of the measurement channel higher, and at the same time reduces the resistance when the fluid flows, ensuring the accuracy of the measurement.

2. CD type vortex flowmeter main structure

The structure of the CD-type vortex flowmeter is relatively simple, requiring only a measuring channel and a single turbine assembly. It is small in size and easy to install, and is suitable for limited field layout. The single-turbine configuration may result in a slight decrease in measurement accuracy, especially at high Reynolds numbers or non-ideal conditions.

3. Vortex Flowmeter DY Type and CD Type Applicable Scenarios

Due to its high precision and stability, DY type vortex flowmeter is usually used in the following scenarios:

1. Pipe diameter is large, and the need for high-precision flow measurement.
2. Fluid properties complex, the presence of solid particles or gas impurities when the flow measurement.
3. The measurement stability requirements of high industrial production process monitoring.

The CD type vortex flowmeter is suitable for the following scenarios:

1. Site space is limited, equipment installation needs to be compact.
2. Fluid properties are relatively simple, and the measurement accuracy is not high scene.
3. For small pipe or equipment internal flow monitoring.

4. Vortex Flowmeter DY Type and CD Type Maintenance and Cost

Although the DY vortex flowmeter has high precision, its structure is complex and its maintenance cost is relatively high. Regular inspection of the inductance coil, adjustment of turbine clearance and other maintenance work requires professional technicians and certain equipment input.

The CD-type vortex flowmeter has a simple structure and low maintenance cost, but its simple structure may also cause its life to be shorter, requiring regular inspection and cleaning.

5. summary

There are significant differences between DY and CD vortex flowmeters in terms of working principle, construction, application scenarios and maintenance costs. DY type flowmeter is suitable for scenes with high precision and stability requirements, while CD type flowmeter is more suitable for the situation of limited site layout. Choosing the right type of flowmeter requires a combination of measurement scenarios, equipment requirements, and budget constraints.