Inst ToolsInst ToolsInst Tools
  • Ask
  • Courses
  • Videos
  • Q & A
    • Interview
      • Instrumentation
      • Electronics
      • Electrical
      • Practical Questions
    • MCQ
      • Instrumentation MCQ
      • Electrical MCQ
      • Electronics MCQ
      • Control Systems MCQ
      • Analog Electronics MCQ
      • Digital Electronics MCQ
      • Power Electronics MCQ
      • Microprocessor MCQ
      • Multiple Choice Questions
  • EE
    • Electronics
      • Electronics Q & A
      • Electronic Basics
      • Electronic Devices & Circuits
      • Electronics Animation
      • Digital Electronics
    • Electrical
      • Electrical Basics
      • Electrical Q & A
      • Power Electronics
      • Electrical Machines
      • Electrical Animation
      • Power Systems
      • Switchgear & Protection
      • Transmission & Distribution
  • Measure
    • Control Valves
    • Calibration
    • Temperature
    • Pressure
    • Flow
    • Level
    • Analyzers
    • Switches
    • Vibration
    • Solenoid Valve
  • Control
    • PLC Tutorials
    • Control Systems
    • Safety Instrumented System (SIS)
    • Communication
    • Fire & Gas System
  • More
    • Design
    • Tools
    • Animation
    • Basics
    • Formulas
    • Standards
    • TextBooks
    • Common
    • Software
    • Excel Tools
    • Erection & Commissioning
    • Process Fundamentals
    • Videos
    • Books
Search
All rights reserved. Reproduction in whole or in part without written permission is prohibited.
Reading: Pressure to Current (P/I) Converter Principle
Share
Notification Show More
Font ResizerAa
Inst ToolsInst Tools
Font ResizerAa
  • Courses
  • PLC Tutorials
  • Control Systems
Search
  • Ask
  • Courses
  • Videos
  • Q & A
    • Interview
    • MCQ
  • EE
    • Electronics
    • Electrical
  • Measure
    • Control Valves
    • Calibration
    • Temperature
    • Pressure
    • Flow
    • Level
    • Analyzers
    • Switches
    • Vibration
    • Solenoid Valve
  • Control
    • PLC Tutorials
    • Control Systems
    • Safety Instrumented System (SIS)
    • Communication
    • Fire & Gas System
  • More
    • Design
    • Tools
    • Animation
    • Basics
    • Formulas
    • Standards
    • TextBooks
    • Common
    • Software
    • Excel Tools
    • Erection & Commissioning
    • Process Fundamentals
    • Videos
    • Books
Follow US
All rights reserved. Reproduction in whole or in part without written permission is prohibited.
Inst Tools > Blog > Control Valves > Pressure to Current (P/I) Converter Principle

Pressure to Current (P/I) Converter Principle

Last updated: August 26, 2019 3:07 pm
Editorial Staff
Control Valves
5 Comments
Share
2 Min Read
SHARE

We can construct a pressure to current converter using a Flapper- Nozzle arrangement , Bellows and a Linear Variable Differential Transformer (LVDT) circuit.

Contents
Pressure to Current ConverterArticles You May Like :Pressure Regulator Flapper-NozzleTransformer Theory of OperationPneumatic Sensing ElementsElectronic Pressure SensorsC-Bourdon Tube Pressure Gauge

Input pressure is given to Flapper-Nozzle arrangement and the output current will come through the LVDT.

Also Read : What is Flapper/Nozzle ?

Flapper Nozzle arrangement: It is type of pressure controlling device. It controls the input pressure by the moving the Flapper away or towards the nozzle, if we need high pressure, then nozzle will be closed by the Flapper and if we need less pressure, then nozzle will be opened by moving flapper away.

Bellows:- Bellows are one type of pressure measuring devices. They are the elements which will expand as per the applied pressure. Based on the displacement we can measure the pressure.

Linear Variable Differential Transformer (LVDT): It works on the principle of Mutual Inductance. In the LVDT three coils will be present. Primary coil is connected to a power source and secondary coils are connected in series opposition method.

At initial position, the voltage induced will be zero. If the core displaces, then due to inductance, voltage will be induced into the coils, resulting in the current.

Pressure to Current Converter

Pressure to Current Converter

First Input pressure is supplied to the Flapper- Nozzle arrangement.  Then it will supplied through a pipe and that pressure is given as input to the bellows. These bellows are connected to the Core of LVDT.

When pressure is applied to bellows, they will expand thus core displaces and the voltage is induced on the secondary coils of LVDT.

As voltage is induced, current will flow through the coil. That current is proportional to the input pressure applied. Thus Pressure is converted into equivalent current.

When compared with standard values we can covert 3-15 P.S.I of pressure can be converted to 4-20 mA of current

Articles You May Like :

Pressure Regulator Flapper-Nozzle

Transformer Theory of Operation

Pneumatic Sensing Elements

Electronic Pressure Sensors

C-Bourdon Tube Pressure Gauge

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 !
Globe Valve Body Design
How to Troubleshoot Control Valve? – Problems and Solutions
What is Gate Valve ?
Control Valve Tips and Tricks
What is Piston Check Valve ?
Share This Article
Facebook Whatsapp Whatsapp LinkedIn Copy Link
Share
5 Comments
  • Pravin Maheshkar says:
    April 29, 2017 at 7:07 am

    nice illustration through clear picture…

    Reply
  • Manikandan says:
    July 7, 2017 at 4:09 am

    This explanation shows your experience…

    Reply
  • Sai kiran says:
    February 9, 2019 at 10:28 am

    What happens if there is no flapper and pivot…

    Reply
  • Raed says:
    July 4, 2019 at 7:15 pm

    Many thanks

    Reply
  • Shahan Ahmed says:
    August 26, 2019 at 4:06 pm

    It’s a helpful site

    Reply

Leave a Reply Cancel reply

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

Stay Connected

128.3kFollowersLike
69.1kFollowersFollow
208kSubscribersSubscribe
38kFollowersFollow

Categories

Recent Comments

  • Guifty Shimica on Top Non-PLC Certification Courses for Automation Professionals
  • Guifty Shimica on Top Non-PLC Certification Courses for Automation Professionals
  • MIHARITSOA Aina Sitraka on Top Non-PLC Certification Courses for Automation Professionals
  • Vaishnavi on Free Instrumentation Course for Trainee Engineers

Related Articles

What is Poppet Valve?

What is Poppet Valve? When we Use a Poppet Valve?

noise-abatement trim

Control Valve Noise Problems

Control Valve flow coefficient (Cv)

Why we Measure Control Valve flow coefficient (Cv)?

Summary of Valve Types Characteristics

Summary of Valve Types Characteristics

Control Valve Flow Characteristics

Different Control Valve Flow Characteristics

Air Release Valve

What is an Air Valve? Purpose, Types, Advantages, Disadvantages

Online Testing of Solenoid Valve

Design and Accessories Required for Online Testing of Solenoid Valve

Globe Control Valve Animation

Basics of Globe Valves

More Articles

water treatment station

What is a Vent Filter? – Water Treatment Plant

Stop Check valve

What is Stop Check valve ?

pressure transmitter calibration setup

Why Pressure Vessel Connected to Tubing System?

Radiochemical Questions and Answers

Fundamentals of Radiochemical Methods Questions

Difference Between Predictive Maintenance and Preventive Maintenance

Difference Between Predictive Maintenance and Preventive Maintenance

Formulas to calculate ma from PV

Formulas to calculate mA from PV, LRV and URV

Transformer Efficiency

Transformer Efficiency

Calculate the 0%, 50%, and 100% Calibration Points

Calculate the 0%, 50%, and 100% Calibration Points

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?