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BETA-LUGB Vortex flowmeter without temperature

โพสต์เมื่อ : 12 ม.ค 2565 เวลา 6:48 น.

BETA-LUGB Vortex Flowmeter Without Temperature & Pressure Compensation

BETA-LUGB Vortex flowmeter work on the principle of generated vortex and relation between vortex and flow by theory of Karman and Strouhal, which specialize in measurement of steam, gas and liquid of lower viscosity.

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Pipe diameter	DN10-DN300
Accuracy	1.0% 1.5%
Range Ratio	1:8
Ingress protection	IP65

Wafer connection	DN15-DN300(priority PN2.5MPa)
Flange connection	Flange connection: DN15-DN50(priority PN2.5MPa） DN250-DN300(priority PN1.0MPa） DN15-DN50(priority PN2.5MPa）
Accuracy	Gas without compensation: DN15-DN25--1.5%, DN32-DN200--1.0%, DN250-DN300--1.5%
Range Ratio	Gas density:1.2kg/m3, Range ratio: 8:1
Medium Temperature	-20°C ~ +150°C、-20°C ~ +260°C、-20°C ~ +300°C
Power Supply	24VDC±5% Li battery(3.6VDC)
Output signal	4-20mA Frequency RS485 communication (Modbus RTU)
Ingress protection	IP65
Body Materials	Display
Display	128*64 dot matrix LCD

A fluid flowing with a certain velocity and passing a fixed obstruction generates vortices. The generation of vortices is known as Karman’s Vortices.The frequency of vortex shedding is a direct linear function of fluid velocity and frequency depends upon the shape and face width of bluff body.

Since the width of obstruction and inner diameter of the pipe will be more or less constant, the frequency is given by the expression:

f=StV/d

In the formula:
f – Karman vortex frequency generated at one side of bluff body (Hz)
St – strouhal number (non-dimensional number)
V – average speed of fluid (m/s)
d – width of bluff body (m)

BETA-LUGB Vortex flowmeter without temperature

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