Inst ToolsInst ToolsInst Tools
  • Courses
  • Automation
    • PLC
    • Control System
    • Safety System
    • Communication
    • Fire & Gas System
  • Instrumentation
    • Design
    • Pressure
    • Temperature
    • Flow
    • Level
    • Vibration
    • Analyzer
    • Control Valve
    • Switch
    • Calibration
    • Erection & Commissioning
  • Interview
    • Instrumentation
    • Electrical
    • Electronics
    • Practical
  • Q&A
    • Instrumentation
    • Control System
    • Electrical
    • Electronics
    • Analog Electronics
    • Digital Electronics
    • Power Electronics
    • Microprocessor
  • Request
Search
  • Books
  • Software
  • Projects
  • Process
  • Tools
  • Basics
  • Formula
  • Power Plant
  • Root Cause Analysis
  • Electrical Basics
  • Animation
  • Standards
  • 4-20 mA Course
  • Siemens PLC Course
Reading: Comparison of Venturi and Orifice flow meter
Share
Font ResizerAa
Inst ToolsInst Tools
Font ResizerAa
  • Courses
  • Design
  • PLC
  • Interview
  • Control System
Search
  • Courses
  • Automation
    • PLC
    • Control System
    • Safety System
    • Communication
    • Fire & Gas System
  • Instrumentation
    • Design
    • Pressure
    • Temperature
    • Flow
    • Level
    • Vibration
    • Analyzer
    • Control Valve
    • Switch
    • Calibration
    • Erection & Commissioning
  • Interview
    • Instrumentation
    • Electrical
    • Electronics
    • Practical
  • Q&A
    • Instrumentation
    • Control System
    • Electrical
    • Electronics
    • Analog Electronics
    • Digital Electronics
    • Power Electronics
    • Microprocessor
  • Request
Follow US
All rights reserved. Reproduction in whole or in part without written permission is prohibited.
Inst Tools > Blog > Flow Measurement > Comparison of Venturi and Orifice flow meter

Comparison of Venturi and Orifice flow meter

In comparing the venturi meter with the orifice meter, both the cost of installation and the cost of operation must be considered.

Last updated: November 1, 2023 6:47 am
Editorial Staff
Flow Measurement
No Comments
Share
3 Min Read
SHARE

In comparing the venturi meter with the orifice meter, both the cost of installation and the cost of operation must be considered.

The orifice plate can easily be changed to accommodate widely different flow rates, whereas the throat diameter of a venturi is fixed, so that its range of flow rates is circumscribed by the practical limits of Dp.

Compare Venturi and Orifice

Orifice Plate Sizing
Image: orifice Plate

The orifice meter has a large permanent loss of pressure because of the presence of eddies on the downstream side of the orifice-plate; the shape of the venturi meter prevents the formation of these eddies and greatly reduces the permanent loss.

The orifice is cheap and easy to install. The venturi meter is expensive, as it must be carefully proportioned and fabricated. A home made orifice is often entirely satisfactory, whereas a venturi meter is practically always purchased from an instrument dealer.

On the other hand, the head lost in the orifice for the same conditions as in the venturi is many times greater. The power lost is proportionally greater, and, when an orifice is inserted in a line carrying fluid continuously over long periods of time, the cost of the power may be out of all proportion to the saving in first cost. Orifices are therefore best used for testing purposes or other cases where the power lost is not a factor, as in steam lines.

Venturi Flow Meter Animation
Animation: venturi Flow Meter

However, in spite of considerations of power loss, orifices are widely used, partly because of their greater flexibility, because installing a new orifice plate with a different opening is a simpler matter. The venturi meter can not be so altered. Venturi meters are used only for permanent installations.

It should be noted that for a given pipe diameter and a given diameter of orifice opening or venturi throat, the reading of the venturi meter for a given velocity is to the reading of the orifice as (0.61/0.98)2, or 1:2.58. (i.e. orifice meter will show a higher manometer reading for a given velocity than the venturi meter).

If you liked this article, then please subscribe to our YouTube Channel for Instrumentation, Electrical, PLC, and SCADA video tutorials.

You can also follow us on Facebook and Twitter to receive daily updates.

Read Next:

  • Coriolis Mass Flow meter
  • Orifice Flow Meter Compensation
  • Basics of Flow measurement
  • Different Types of Flow Sensors
  • Dall Tube Flow Meter Theory
Don't Miss Our Updates
Be the first to get exclusive content straight to your email.
We promise not to spam you. You can unsubscribe at any time.
Invalid email address
You've successfully subscribed !

Continue Reading

Coriolis Mass Flow Sensor Theory
What is a Flow Element? – Types, Comparison of Flow Elements
All About Turbine Meters
Venturi Flow Meter – Working Principle, Advantages, Animation
What is a Paddle Wheel Flow Meter?
Flow Instruments – Selection, Principle & Application
Share This Article
Facebook Whatsapp Whatsapp LinkedIn Copy Link
Share
Leave a Comment

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

Stay Connected

128.3kFollowersLike
69.1kFollowersFollow
210kSubscribersSubscribe
38kFollowersFollow

Categories

Explore More

Types of Flow Meters MCQ – Instrumentation and Control
Turbine Flow Meter Coefficient and Scaling Factor
Important Factors in Flow Measurement
Turbine Flow Meters Troubleshooting
Standardized Volumetric Flow
Read Gas Composition from Gas Metering System using RS485 Protocol
How to do Turbine Flow Meter Verification?
Oval Gear Meter – Principle, Advantages, Limitations, Applications

Keep Learning

Metering components to measure flow of Natural gas

Is it Easy to Measure Natural Gas Flow and Volume?

Flow Switch Working Principle Animation

Working Principle of Flow Switch with Animation

Pressure Temperature Compensation Flow Measurement

Pressure Temperature Compensation Flow Measurement

magnetic-flow-meter-earthing

Importance of Magnetic Flow Meters Grounding

Coriolis Mass Flow meter as a Multi Variable Transmitter - 1

Coriolis Mass Flow Meter as a Multi-Variable Transmitter

magnetic flow meter parts

What is a Magnetic Flow Meter?

L2F insertion-style flowmeter

Optical Flow Meter Principle

Rotameter

What is a Variable Area Flow Meter?

Learn More

Selection of Fire and Gas Detectors

Basic Guidelines for Selection of Fire and Gas Detectors

Classification of valves

Introduction to Types of Valves

Differential Pressure Switch Working Principle

Unspecified CPU in Tia Portal

How to Add Unspecified CPU in Tia Portal?

DCS Quiz

DCS Quiz

Power Systems Questions & Answers

Power Systems MCQ Series 15

In-Situ Zirconia Oxygen Analyzer

Oxygen (O2) Measurement in Flue Gas

Electrical Machines Questions and Answers

Rotating Magnetic Field Multiple Choice Questions

Menu

  • About
  • Privacy Policy
  • Copyright

Quick Links

  • Learn PLC
  • Helping Hand
  • Part Time Job

YouTube Subscribe

Follow US
All rights reserved. Reproduction in whole or in part without written permission is prohibited.
Welcome Back!

Sign in to your account

Username or Email Address
Password

Lost your password?