Vortex Flowmeter

GENERAL INFORMATION

The vortex flowmeter operates on the von Kármán vortex street principle: as fluid flows past a bluff body, alternating vortices are shed downstream at a frequency directly proportional to the flow velocity. This frequency is detected by piezoelectric or other sensors and converted into a volumetric or mass flow rate. With no moving parts, the meter delivers high reliability, wide turndown, and low maintenance. It is suitable for measuring clean liquids, gases, and steam, and is widely used in chemical, petrochemical, power, HVAC, water treatment, and food and beverage industries. It is particularly valued for saturated and superheated steam metering, as well as for utility and energy management applications when integrated with temperature and pressure compensation.

BRIEF INTRODUCTION

The vortex flow meter is a kind of velocity flow meter designed based on the Karman vortex principle. It is mainly used for flow measurement of medium and fluid in industrial pipelines, such as flow control and measurement of gas, steam or liquid, and other media. According to the selection, the vortex flow meter can achieve the following functions: measuring the temperature, pressure, instantaneous flow, and cumulative flow of medium fluid in industrial pipelines. It has pulse output, 4-20mA analog signal output, RS485 communication (Modbus RTU protocol), and other functions. The vortex flow meter is widely used in heat supply, gas supply, chemical industry, environmental protection, metallurgy, textile, steel, pharmaceutical, paper making, drainage, and other corporations to superheated steam and saturated steam, compressed air and gas (oxygen, nitrogen, hydrogen, etc.), water and liquid (such as water, alcohol, stupid class, etc.) of the measurement and control.

ADVANTAGES

The product has high reliability, long-term stability, a simple structure, and easy maintenance.
The zero point has no drift, and the performance is very stable.
Various structural forms, including pipeline type, plug-in flow sensor, and other forms.
Small pressure loss, high accuracy.
Flexible installation.
The circuit adopts various protection modes, which are anti-surge and have strong adaptability.
316L stainless steel sensor housing.
Long-life lithium battery.

MAIN SPECIFICATIONS

Nominal Diameter	DN15-DN300 (inline type); DN300-DN1000 (insertion type)
Nominal Pressure (Wafer Connection)	DN15-DN50: PN4.0MPa (priority) DN65-DN100: PN2.5MPa (priority) >DN125: PN1.6MPa (priority)
Nominal Pressure (Flange Connection)	DN15-DN50: PN2.5MPa (priority) DN65-DN300: PN1.6MPa (priority) Applicable for negative pressure environment
Main Body Material	304 Stainless Steel
Medium Temperature Range	-40℃ ~ +100℃; -40℃ ~ +250℃; -40℃ ~ +330℃
Ambient Temperature Range	-20℃ ~ +55℃
Relative Humidity	5% ~ 90%
Atmospheric Pressure Range	86kPa ~ 106kPa
Measurement Range	Refer to the product selection specification table
Measurement Accuracy	Inline Flange Type: ±1.5% of flow rate Insertion Type: ±2.5% of flow rate Temperature Measurement: ±0.8℃ Pressure Measurement: ±0.3%FS
Range Ratio (Turndown Ratio)	1:6 ~ 1:25
Pressure Loss	Complies with JB/T9249 standard, Cd≤2.4
Power Supply	24VDC or 3.6V built-in battery
Output Signals	4-20mA analog output & Pulse output
Communication Interface	Modbus RTU over RS485; HART protocol
Signal Transmission Distance	3-wire pulse output: ≤300m 2-wire 4-20mA current output: ≤1500m RS485 communication: ≤1200m Maximum load resistance: ≤500Ω
Enclosure Protection Level	IP65