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: Air Cylinder Consumption Calculation for Control Valves
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 > Control Valves > Air Cylinder Consumption Calculation for Control Valves

Air Cylinder Consumption Calculation for Control Valves

Last updated: September 28, 2022 2:40 pm
R Jagan Mohan Rao
Control Valves Instrumentation Design
1 Comment
Share
4 Min Read
SHARE

The single-acting spring return cylinder:

These are just like the standard single-acting cylinders with the exception that they have a spring inside of them. At the completion of the power stroke, the spring helps to push the piston back to its initial starting position.

Contents
The single-acting spring return cylinder:The double-acting cylinder:Basic Calculations:Example 1:Example 2:

The double-acting cylinder:

It is called double-acting because the cylinder has a power stroke on the push and pull. This type of double-acting cylinder is used primarily for mechanical devices.

Basic Calculations:

The Area is calculated by using basic algebra with regard to the bore.

To get the area we take half the bore and square it after that multiply it by Pi.

Air Cylinder Consumption Calculation for Control Valves

Once we know the area we multiply it by the pressure to get the force.

Formula for Force = Area x Pressure Area = (1/2 Bore) ^2 x Pi 

The equation to determine how much gas from a tank: P1 x V1 = P2 x V2

Note: This formula is known as Boyle’s Law, which states “The volume of a given mass of gas is inversely proportional to the absolute pressure if the temperature remains constant”.

Let us assume for the moment that the temperature does remain constant.

 P1 = input pressure

V1 = input volume.

P2 i= output pressure

V2 = output volume.

Example 1:

A 88 cubic inch HPA tank with a 2500 psi tank pressure, 250 psi regulated pressure, and a double-acting cylinder with a 4″ bore and a 6″ throw with a 1″ rod to actuate a mechanical device.

Let us find out how much-compressed air is in the tank.

P1 x V1 = P2 x V2

2500 x 88 = 250 x V2

220000   = 250 x V2

220000 / 250 = V2

V2 = 880 cubic inches, at 250 psi

Example 2:

Using the example above, find out how much volume is in the cylinder using the formula

Volume = Area (bore) x Length (throw).

The Push Stroke V = ((1/2 bore)^2 x Pi) x throw

 V = ((1/2 4)^2 x Pi) x 6

V = (2^2 x Pi) x 6

V = 12.56 x 6 V

 = 75.36 cubic inches

The Pull Stroke Vrod = ((.5)^2 x Pi) x 6 Vrod = 4.71 cubic inches

 V = 75.36 (The Push Stroke V) – 4.71(The Pull Stroke Vrod) = 70.65 cubic inches

The total volume for the push, stroke (75.36), pull stroke (70.65)

If we add them together to get 146.01 cubic inches.

If we divide that number into the available volume that the tank has: Force = Area x Pressure

and we know that we have an area = 12.56 square inches on the face of the piston in the ‘push’ stroke

The area is equal to  (12.56 – 0.785) = 11.775 square inches on the face of the piston in the ‘pull stroke.

The Push Force = 12.56 x 250.

The Pull Force = 11.775 x 250

Reference

Read Next:

  • Control Valve Sizing
  • Types of Valve Actuators
  • Relation between Cv and Kv
  • Types of Failures in Valves
  • Control Valve Stroke Test
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

Calculate Flow Coefficient Kv of Solenoid Valve
Control Valves Multiple Choice Questions
Why we Measure Control Valve flow coefficient (Cv)?
Self Actuated Pressure Control Valve Principle
Electrical Heat Tracing
Exclusive Control Valve Sequence
Share This Article
Facebook Whatsapp Whatsapp LinkedIn Copy Link
Share
1 Comment
  • ROHITH KUMAR SAINI says:
    May 17, 2020 at 1:28 pm

    I understand that the air consumption for a single pull and a single push stroke is calculated. Adding them we get consumption a single cycle. This article is very helpful for design Engineers.

    Reply

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

Field Instruments Scaling and Unit Conversions
Why we use Cable Shielding with Ferrites ?
Vendor View of Supplying Industrial Process Control & Safety Systems
Trip Valve Principle
All About Turbine Meters
Testing of Pneumatic Systems
Emergency Shutdown Valve : Advantages
Short Notes on Different Valve Types

Keep Learning

Needle Valve Schematic

How Needle Valve Works ?

Poppet vs Spool Valves

Why Valve Type Matters ? Poppet vs Spool Valves

Why Restriction Orifice is some distance from Blowdown valve

Why Restriction Orifice is some distance from Blowdown valve ?

SMART Control Valve Positioner

Electronic Valve positioners

Latest Control Valves Interview Questions

Control Valve Interview Questions and Answers

Instrumentation Role during Steam Blowing

Instrumentation Role during Steam Blowing

Control valve sizing

Basics of Control Valve Sizing

Safety Relief Valve Questions & Answers

Safety Relief Valve Questions & Answers

Learn More

diaphragm-pressure-gauge

Diaphragm Pressure Sensors

Analog Modulators Objective Questions

Analog Modulators Objective Questions

Transformer Efficiency

Transformer Efficiency

positive displacement flow meter pictures

What is a Positive Displacement Flow Meter?

Electrical Machines Objective Questions

Electrical Machines MCQ Series 4

Pneumatic Transmitter

Pneumatic Level Transmitter Calibration Table

Studio 5000 Define Program or Operator Control in Functional Block Diagram

Studio 5000: Define Program or Operator Control in Functional Block Diagram

Software Troubleshooting Errors and Faults in Siemens PLC

Software Troubleshooting Errors and Faults in Siemens PLC

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?