SILVER AUTOMATION INSTRUMENTS LTD.

Vortex Flow Meter

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Overview of Vortex Flow Meter

STLU series smart vortex flow meter is mainly used for measuring flow of industrial pipeline fluid, such as gas, liquid and steam, etc. Vortex meter has little pressure loss, broad span range and high accuracy. Vortex shedding flow meter is not under influence of density, pressure, temperature and viscosity when measuring volumetric flow. It has no movable mechanical parts with high reliability and little maintenance.


Main Features of Vortex Flow Meter


  • Best of STLU Intelligent Vortex flow sensor is piezocrystal built in bluff body to avoid fluid turbulence caused by external type, no zero drift, and high reliability.
  • By lots of wave analysis of vortex flow transducer for a long time, we have designed the most scientific probe shape, wall thickness, height, probe rod diameter and matching piezocrystal, adopts advanced CNC to machine to ensure technical parameters of proper alignment and smooth finish etc., and with special treating process to maximatily overcome existed signal influence by intrinsic self-oscillation frequency.
  • STLU Intelligent Vortex Flow Transducer has good commonality and interchangeability. Adopt advanced CNC to machine parts such as transducer body and bluff body etc. to ensure machining accuracy to make parts (especial for bluff body) has good commonality, so that, repeatability and accuracy won¡¯t be affected by parts change and get signal with high signal noise ratio and good stability. It is stainless steel flow meter.
  • Simple & fixed structure, no moving parts, high reliability, convenient maintenance.
  • Wide measuring range, turndown ratio can reach 10:1 in Reynolds Number 2¡Á10~ 7¡Á 10. 4 6
  • Detecting element not contact with the measured fluids directly, stable performance and long service life.
  • Detecting probe and bluff body installed independently, and high temperature resistance piezocrystal sealed in bluff body make transducer simple structure, good commonality and high stability.
  • Vortex Flow transmitter Output pulse signal and current signal directly proportional to flowrate, and have RS-485, Hart, ModBus communication for convenient computer networking.
  • When vortex flow transducer measures liquid volumetric flow, it does not need temperature, pressure compensation. Vortex output signal is linear to velocity, that is to say, directly proportional to volumetric flowrate. When measure gas or steam, it needs temperature and pressure compensation. Compensating pressure and temperature is to get volumetric flow of gas under standard state or mass flow of steam. It is often be used as steam flow meter.
  • Low pressure loss, just 1/4 ~ 1/2 of orifice plate.
  • In a specific range of Reynolds Number, flow character just refers to bluff body shape and dimension, and not affected by fluid pressure, temperature, viscosity, density and ingredients.
  • Wide application, can measure flow rate of steam, gas, liquid etc.



Vortex Flow meter Technical Parameter

Installation Type

Measured Fluid

Accuracy

Repeatability

Pipe Type

Gas (incl.steam)

±1.5 %

±1.0%

0.50%

0.33%

Inserted Type

Gas

Liquid

±3.0%

±2.5%

1.00%

0.83%





Measuring Range

Gas (incl.steam): 7~55 m/s (7~50 m/s for DN≥200)

Liquid:0.7~5.5 m/s





Rated Pressure

GB 1.6Mpa,2.5Mpa,4.0Mpa,6.4Mpa

DIN PN16,PN25,PN40

JIS 10K,20K,40K

ANSI Class 150,Class 300, Class 600



Fluid Temperature

-40~+250℃(-40~+120℃for inserted)

+100~+350℃ (high temp)



Installation Type

Pipe Vortex Flow Transducer

Inserted



Parts Name

Material

Transducer Body

304 SS

Bluff Body

304SS

Detecting Probe

Connecting Rod

316SS

304SS

Radiattor

A-alloy

Gasket

High Temperature Resistance Asbestos

NBR

Graphite



Power Suply

24V DC

3.6V Lithium Battery (Local display)

Double Power Supply (24VDC,3.6V Lithium Battery)



Output Signal

Pulse, 4~20mA, RS-485,Hart,Modbus

Electric Terminal

M20*1.5

Protection Grade

Flameproof Exd II BT3-6

Insteinsical Safe Exia II CT3-6

Body Process

SS Sand-blast for Transducer Body

And Plastic Coating for Amplifier Cover

Ambient

Temperature

-35~60℃(No LCD)

-5~60℃(with LCD)

Relative Humidity

5~95%


Vortex Flow meter Model Selection

Item

Code

Description

Factory Mark

STLU

Silver Automation Instruments

Working Principle

V

Karman Vortices

Meter Type

F

Flowmeter

Meter Catagory

N

Standard Intelligent

Installing Type

-1

Flanged(DN50~DN300)

2

Wafer type (DN15~DN300)

3

Fixed Inserted

4

Adjustable Inserted

5

Adjustable Inserted (with Ball Valve)

Measured Fluid

2

Liquid

3

Gas

4

Steam

Nominal Diameter

-015

15mm

020

20mm

02

25mm

03

32mm

04

40mm

05

50mm

06

65mm

08

80mm

10

100mm

12

125mm

15

150mm

20

200mm

25

250mm

30

300mm

DN/10(for Inserted)

DN(DN≥250mm)

Indicator

D

With Digital Indicator

N

No Indicator

Power Supply

-1

24V DC

2

3.6V Lithium Battery

3

Double Power Supply(24V DC,3.6v Lithium Battery)

Output Signal

0

No output

1

Pulse Output

2

Two Wire :4~20mA DC

3

RS-485 (manufacture-defined protocol)

4

Hart

5

RS-485 (Modbus)

Fluid Temperature

1

Standard -40~250℃(-40~120℃for inserted)

3

High Temperature Type :+100~+350℃

Rated Pressure

-G1

GB 1.6Mpa

G2

GB 2.5 Mpa

G3

GB 4.0 Mpa

G4

GB 6.4 Mpa

D1

DIN PN16

D2

DIN PN25

D3

DIN PN40

J1

JIS 10K

J2

JIS 20K

J3

JIS 40K

A1

ANSI Class 150

A2

ANSI Class 300

A3

ANSI Class 600

Explosion Proof

N

Non

d

Flameproof

i

Intrinsically Safe

Compensation

0

No compensation

1

With temperature and pressure compensation

Companion Flange

0

No

1

With

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