RBVF Vortex Flow Meter Manufacturer | RB Flowmeter

RBVF Vortex Flow Meter Karman Vortices Principle with Differential Sensor
  • RBVF Vortex Flow Meter Karman Vortices Principle with Differential Sensor
  • RBVF Vortex Flow Meter with Differential Sensor， Medidor de flujo Vortex
  • RBVF Vortex Flow Meter for Steam and Gas Measurement - R&B Instrument Inc.

The RBVF Series Vortex Flow Meter by R&B Instrument Inc. is a robust instrument engineered for the demanding task of measuring steam, gas, and liquid flow. Based on the proven Karman Vortex Street principle, the RBVF series utilizes advanced differential sensing technology coupled with isolated shielding and filtering. This ensures exceptional signal stability and industry-leading anti-vibration performance, even in complex industrial environments.

Key Features & Advantages:

  • Superior Reliability: No moving mechanical parts mean virtually zero wear and significantly reduced maintenance costs for R&B Instrument Inc. customers.
  • High Precision & Stability: Features advanced signal processing to ensure ±1.0%R (or better) accuracy with exceptional anti-vibration capabilities.
  • Integrated Compensation: Available with built-in temperature and pressure compensation to ensure accurate readings in fluctuating steam and gas environments.
  • Energy Efficient: Designed with low pressure loss, helping plants reduce energy consumption during long-term operation.
  • Flexible Power Options: Supports both 24V DC loop power and battery-powered configurations for remote or mobile installations.

 

Description

  • Principle
  • Features
  • Specification
  • Model Selection
  • Applicants
  • Download
Principle

The RBVF series operates on the Karman Vortex Street principle. As fluid passes a non-streamlined bluff body (vortex generator), alternating vortices are shed on each side. R&B Instrument Inc. utilizes high-sensitivity piezoelectric sensors to detect the frequency of these vortices, which is directly proportional to the fluid's velocity. Our advanced electronics then convert this frequency into a precise volumetric or mass flow rate.

Features

The RBVF Series Vortex Flow Meter Features:

  •  No moving mechanical parts
  • Low maintenance
  • Low pressure loss
  • Large measuring range
  • High accuracy
  • High reliability
  •  24V or Battery
  • Temperature and pressure compensation 
Specification

The RBVF Series Vortex Flow Meter Specification:

Main Technical data 

Fluid Type

Steam, Gas, Liquid

Nominal diameter(mm)

25,40,50,65,80,100,125,150,200,250,300, (300~1000 Insert type)

Nominal pressure

 (MPa)

DN25-DN200 4.0 (>4.0 clarify),

DN250-DN300 1.6 (>1.6 clarify)

Connection type

Insertion

Flange

Body Material

SS304(1Cr18Ni9Ti) or customize

Accuracy

Inline type

±1%R, ±1.5%R,±1FS;

Insert type:

±2.5%R,±2.5%FS

Range of

1:6~1:30

Power supply voltage

Sensor: +12V DC, +24V DC; Transmitter: +12V DC, +24V

Battery: 3.6V

Output signal

Square wave pulse (not including the battery power supply type): high level or low level5V,1V; current: 4~ 20mA

Protection grade

Standard

IP65

Diving type

IP68

vibrating acceleration

piezoelectric type:   

0.2g  

 

capacitance:

1.0~2.0g

Medium temperature

Piezoelectric Type

(-50 ~ +260) ℃, (-50 ~ +320) ℃

Capacitive Type

-40～300, -40～400，-40～450

Power Supply

The three-wire system and the two-wire system

Three-wire System

When using external power supply: 12 ~ 24VDC/30mA (-20% ~ +15%), no output can be as low as 9V

Three-wire System

When battery-powered (optional): Lithium battery 3.6V (2-13Ah) / 0.3mA.

Output Signal

Three wire system and two wire system

Transmission distance

3-line pulse:

≤300m

Output: system and two wire system

2-line

4-20mA

Pulse (except battery type)

High level≥6V

Low level: ≤1V

3-line

RS485

Road resistance

≤750Ω

Ex-proof

EXIB

ExdⅡia CT2-CT5

EXD

ExdⅡCT2-CT5

Ambient temperature

(-30 ~ +55) ℃ 

Humidity

5%～90%

Atmospheric Pressure

86～106kPa
Model Selection

The RBVF Series Vortex Flow Meter Model Selection 

RBVF 

Series Vortex Flow Meter 

 

Working principle 

P 

C

Piezoelectric Type

Capacitive Type

Configuration-sensor/transmitter 

C 

Compact type

R-X 

Remote type with 10m cable, x-m cable

 

Connection 

1 

Insertion Type From (DN200- DN1500) 

 

A 

simple plug-in

B 

ball valve plug-in

2 

Flange Type (DN15 to DN300) 

 

A

Wafer（with special carbon steel flange +bolts）

B

Flange(SS304)

 

D 

DIN

A 

ANSI

S 

Others, pls clarify

Fluid Type 

L 

Liquid

S 

Steam

G 

Gas

 

Pipe Size 

DNX 

From DN15 to 1000

 

Power type

D 

24VDC

B 

Battery

 

Output 

N 

No output for battery type

1 

Pulse (without display)

2 

4～20mA

3 

RS-485

4 

4～20mA +Pulse

5 

Pulse + RS485

H 

Hart

 

Temperature- Piezoelectric Type 

1 

(-50 ~ +260) ℃

2 

(-50 ~ +320) ℃

 

Temperature-Capacitive Type

3 

-40～300

4 

-40～400

5 

-40～450

 

Pressure

16

1.6MPa

25

2.5MPa

40

4.0MPa

S

Special

 

Proof

N

Normal

EXIB

ExdⅡia CT2-CT5

EXD

ExdⅡCT2-CT5

 

 

Protect Class

5

IP65

8

IP68

RBVF

X

X

X

X

X

X

X

X

X

X

X

 
Applicants
The RBVF Series Vortex Flow Meter Typical Applications
  • Industrial Steam: Precise monitoring of saturated and superheated steam in boiler systems.
  • Gas Utilities: Measuring compressed air, oxygen, nitrogen, and natural gas in chemical and metallurgical plants.
  • Environmental Protection: Quantitative control of flue gas emissions and sewage discharge.
  • Energy Management: An essential tool for energy conservation and economic accounting in municipal pipelines.
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