Vortex Type

Flow Meter

vFlow 500 SERIES

1. Introduction

The vFlow 500 series vortex flow meter is suitable for measuring flow of steam, gasses and low viscosity liquids in industrial applications. The technologies behind the meter is based on the Karman Vortex Street and Strouhal Number.

The flow will alternately generate vortices when passing by a bluff body that is inserted inside the meter body. The bluff body is a piece of material with a broad, flat front that extends vertically into the flowstream. Flow velocity is proportional to the frequency of the vortices. Flow rate is calculated by multiplying the area of the pipe times the velocity of the flow.

2. Features

  • Detecting element does not touch with flow medium
  • No moving parts, wear resistance, simple structure
  • Widest temperature range from -40°C to +350°C
  • Wide range, high accuracy
  • Pulse signal output or two-wire system 4-20mA current signal output
  • Ex-proof Class: Ex ia IIC T6

3. Unit Characteristic

  • Petroleum Industry
  • Chemical Industry
  • Heat Supply Industry
Vortex Flow Meter

4. Dimensions

Pipe size (mm) Inner diameter D1 (mm) Length L(mm) Flange outer diameter D3 (mm) Center distance of bolt hole (mm) Flange thickness C (mm) Bolt hole diameter d (mm) Screw quantity n (mm)
15 15 170 150 110 18 18 4
20 20 170 150 110 18 18 4
25 25 170 150 110 18 18 4
32 32 170 155 115 18 18 4
40 40 190 160 120 18 18 4
50 50 190 165 125 20 18 4
65 65 220 185 145 20 18 4
80 80 220 200 160 20 18 8
100 100 240 220 180 22 18 8
125 125 260 250 210 22 18 8
150 150 280 285 240 24 22 8
200 200 300 240 295 26 22 12
250 250 360 405 355 28 26 12
300 300 400 460 410 32 26 12

5. Technical Specification

Basic Parameter
Measured Medium Liquid, Gas, Stream
Medium Temperature -40~+200°C; -40~+280°C ; -40~+350°C
Nominal Pressure 1.6MPa; 2.5MPa; 4.0MPa (Other pressure can be customized)
Accuracy ±1.0%, ±1.5%
Measuring Range Ration 1:8 – 1:30 (Standard air condition as reference)
Flow Range Liquid: 0.4-7.0m/s; Gas: 4.0-60.0m/s; Steam: 5.0 – 70.0m/s
Material 1Cr18Ni9Ti
Reynolds Number Normal 2 x 104 – 7 x 106
Resistance Coefficient Cd≤2.6
Vibration Acceleration Allowed ≤0.2g
Ex-Proof Class IP65 ExiaIICT6 Ga
Ambient Condition Ambient Temperature -40°C – 65°C (Non display on site ); -20°C – 55°C (Display on sitre)
Relative Humidity ≤5% ~ 93%
Pressure 86-106kPa
Power Supply 12-24VDC or 3.6V battery powered
Signal Output Pulse frequency singal 2-3000Hz, Low level≤1V, high level≥6V
Two-wire system 4-20mA signal (isolated output), Load≤500

For more information, please download the full brochure here