Vortex Flowmeter

Product Description

AUTOMAC Vortex flow meter is one kind of velocity type flow meter, its based on Karman vortex theory and adopts piezoelectric crystal

to detect the burble frequency of the fluid caused by flowing through the triangular prism in the pipeline and then measure

the flow of fluid. It is widely used in petrol, chemical industry, light industry and power heat supply and so on.

Working Principle

When the fluid in the pipeline passes the burble generator(triangular prism),burble will generate due to the acceleration of

partial flow rate. The burble will arise alternatively in two burble lines, which is called Karman vortex.

The releasing frequency of Karman vortex depends on the size of triangle prim and flow rate of fluid, while independent of

the medium feature parameter, such as the temperature, pressure, it can be indicated by the following formulas:

F=SR*v (1-1.27*d/D) Q=3600*F/K M=Q*P

F..... The releasing frequency of Karman vortex (Hz)

Sr...Strouhal number (unit: dimensionless)

V..... Medium flow rate (m/s)

d..... The width of triangle prim

D..... Vortex meter inner diameter (m)

Q...... Instantaneous volume flow rate (m3/h)

K......Vortex meter coefficient (unit pulse number/m3)

M.... Instantaneous quality flow rate (kg/h)

Flow direction

Burble generator

Burble

P..... Fluid density (kg/m3)

Benefit

• Integrated pressure and temperature compensation.
• 4-20mA, pulse with HART; Optional pulse with RS485
• Wide temperature range up to highest temperature 350C
• Adopt Japan OVAL technology and design
• Embedded sensor, 4 piezo-electric crystal encapsulated inside the sensor.
• No moving parts, no abrasion, non-wearing parts inside, fully welded SS304 body (Optional SS316)

Standard Specification

Size: DN15-DN300mm

Relative Humidity: 85%

Accuracy : 1.5% (standard), 1.0% (optional)

Explosion-proof: Exia IIC T6 Gb

Power Supply: 12VDC, 24VDC

Communication: RS485/Modbus, Hart, Profitbus

Flange Standard : EN1092-1PN10,PN16,PN25,PN40, ANSI BS16.5 Class 150,300,600, JIS2220 10K, 20K,40, AS2129 Table D,Table E

AS4087 PN16,PN21,PN35

Straight Pipe: Inlet Path 12D,Outlet Path 5D

Signal Output: 4-20 mA,pulse

Frequency Output: 2-3000 Hz

Ambient Temperature: -40C-55C (Non Ex-proof Place),-20C-55C (Non Ex-proof Place)

Nominal Pressure:1.6 MPa, 2.5 MPa, 4.0 MPa

Protection Grade: IP65

Velocity: 0.4-7.0 m/s liquid, 4.0-60 m/s gas, 5.070 m/s steam

Body Material: SS304(Standard), SS316(Optional)

Resistance Coefficient: Cd <2.6

Oscillatory Acceleration: 0.2g

Reynolds Number : 2x104-7x106