Anti corrosion vortex flowmeter

Anti corrosion type vortex flowmeter, compared with ordinary vortex flowmeter, uses anti-corrosion materials and can be used to measure corrosive gases or liquids, such as chlorine, solving the measurement problem of corrosive media. It has the characteristics of high precision, low pressure loss, and large range, especially when measuring volumetric flow rate under working conditions, it is almost unaffected by parameters such as fluid density, pressure, temperature, viscosity, etc.

Introduction to anti-corrosion vortex flowmeter

Anti corrosion type vortex flowmeter, compared with ordinary vortex flowmeter, uses anti-corrosion materials and can be used to measure corrosive gases or liquids, such as chlorine, etc., solving the measurement problem of corrosive media. It has the characteristics of high precision, low pressure loss, and large range, especially when measuring volumetric flow rate under working conditions, it is almost unaffected by parameters such as fluid density, pressure, temperature, viscosity, etc.

Performance characteristics

(1) No movable mechanical parts, stable and reliable, long-term operation without special maintenance, easy to repair, and long service life.

(2) Using corrosion-resistant materials with excellent corrosion resistance, it can be used for flow measurement of corrosive media.

(3) Intelligent electromechanical integration has been achieved, and the daily measurement process does not require manual supervision, making it easy to use.

(4) Tolerant installation conditions have shortened the requirements for upstream and downstream straight pipe sections, making installation easier.

(5) Simple structure, small size, light weight, and convenient offline calibration.

(7) The measurement signal can be displayed locally or transmitted remotely as needed.

(8) The header can directly display measurement parameters such as flow rate, pressure, temperature, etc., without the need for conversion, making operation simple.

technical parameters

Instructions for Use

Installation of Vortex Flow Meter

The following precautions must be taken during installation:

A) The flow direction of the measured medium must be consistent with the flow arrow mark on the flowmeter.

B) Installing a card mounted flowmeter can ensure the concentricity of the pipeline and flow meter body through the concave surface of a dedicated concave flange. And be careful not to let the sealing gasket penetrate deep into the pipe.

Requirements for pipeline vibration:
Sensors should be avoided from being installed on pipelines with strong vibrations as much as possible. If installation is necessary, shock absorption measures must be taken. Pipeline fastening devices should be installed at the 2D positions upstream and downstream of the sensor, and anti vibration pads should be added.
Special attention: The vibration at the outlet of the air compressor is strong, and sensors cannot be installed. They should be installed after the air storage tank.

Requirements for airflow conditions:
① The tested gas should be a single-phase, continuous circular flow through the pipeline.
② Before the gas flows through the flowmeter, its velocity must be parallel to the pipeline axis and there must be no vortex flow.
③ The airflow should be subsonic and non pulsating, and its flow rate changes slowly over time.

Installation requirements for flow meters:
Vortex flow meters do not have many special requirements for process installation and usage environment, but any type of flow measurement instrument has a commonality, which is to avoid vibration and high-temperature environment interference components (such as compressors, separators, pressure regulating valves, reducers and manifolds, elbows, etc.) as much as possible, maintain smooth and straight inner walls of the straight pipe sections before and after the instrument, and ensure that the measured medium is a clean single-phase fluid.

Installation precautions:
① Special flanges cannot be welded with sensors when welding straight pipe sections.
② During installation, the flow direction indicator of the sensor should be consistent with the fluid flow direction inside the pipeline.
③ Before installing the sensor, a sealing ring must be placed in the flange groove. The positions of pressure and temperature measurement points are as follows: the pressure measurement point is located 3-5 DN downstream of the sensor, and the temperature measurement point is located 5-8 DN downstream.
④ When measuring high-temperature media, do not wrap the sensor connecting rod around it with insulation materials.

⑤ The shielded cable connecting the transmitter should be routed as far away as possible from strong electromagnetic field interference. It is not allowed to be laid together with high-voltage cables. Shielded cables should be shortened as much as possible and should not be coiled to reduce distributed inductance. Large lengths should not exceed 200 meters.
⑥ Before installing the sensor, the pipeline must be cleaned. Remove impurities from the tube to avoid clogging the sensor after flow. The pipeline for measuring liquids must be filled with the measured liquid to prevent interference from bubbles.

⑦ The pipeline for measuring gases is designed to prevent interference from stored fluids. The installation location is shown in Figure 5. When replacing the probe body under high temperature and high pressure, safe operation and high temperature protection must be carried out. After cooling and reducing pressure, the probe can be replaced under safe conditions.