Inst ToolsInst ToolsInst Tools
  • 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: Basics of Control Valves
Share
Notification Show More
Font ResizerAa
Inst ToolsInst Tools
Font ResizerAa
  • Courses
  • PLC Tutorials
  • Control Systems
Search
  • 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 > Animation > Basics of Control Valves

Basics of Control Valves

Last updated: March 21, 2019 11:33 pm
Editorial Staff
Animation Control Valves
No Comments
Share
5 Min Read
SHARE

Valves are used for thousands of purposes, from simple and mundane tasks, such as turning on the water in a kitchen sink, to tasks as important and difficult as controlling water flow through a nuclear reactor.

Contents
Basics of Control ValvesGlobe ValvesGate ValvesButterfly ValvesBall ValveNeedle ValvePlug ValvesCheck Valves

Regardless of the application, valves are crucial in controlling the flow of liquids and gases in everyday life.

Basics of Control Valves

Certain valves are used to isolate systems, bleed off system pressure, and/or vacuum for maintenance and repair. Others are used to prevent flow reversal or throttle flow within a system.

The type of valve to be used must align with the parameters of the intended service; otherwise, valves could perform poorly or even catastrophically fail. Let’s take a look at some common types of valves and their applications.

Valve Basics

Globe Valves

The globe valve is the most commonly used valve and is applied in applications that require frequent operation and/or throttling of flow.

A globe valve normally consists of a spherical body and a bridge wall that separates the inlet and outlet sections of the valve.

Flow is regulated by a disc-type element or plug that forms a seal with the seat in the valve’s bridge wall and can be opened or closed by adjusting the stem.

Globe Valves Images

Gate Valves

The gate valve is also a commonly used valve. It is used strictly for on/off service, as it is designed to operate either fully closed or fully open.

The gate valve controls fluid flow by lifting and lowering a gate or wedge, which is sealed against a seating surface. Gate valves have a straight-through design and are beneficial when installed in straight-line piping, where a minimum amount of flow restriction is desired.

Due to excessive vibration in partially open conditions, gate valves typically are not used to throttle fluid flow, but rather to start or stop it.

Gate Valve Images

Butterfly Valves

The butterfly valve is a simply designed valve that is lightweight, compact, and inexpensive, particularly in larger valve sizes. It is essentially a flat, circular disc that is hinged in its center and fully closes or opens with a quarter turn of the stem.

It is often used in place of a gate valve, but has the added ability to regulate flow.

butterfly valve Images

Ball Valve

The ball valve uses a ball-shaped plug with a circular hole through its center, within its valve body.

It also can fully open or close with a quarter turn of the stem.

ball valve images

Needle Valve

The needle valve is similar in construction to a globe valve and is used for precise throttling in high-pressure and/or high-temperature systems.

They are designed for small diameter lines and piping that need exact control over the flow of gases, steam, oil, water, or any other light liquid. The valve consists of a sharp pointed stem that controls flow through the seat.

Needle Valve Images

Plug Valves

The plug valve controls fluid flow through an internal plug, in either a cylindrically or conically tapered shape, which incorporates a straight-through opening.

The valve is operated by rotating the plug and stem a quarter turn to either allow a straight-through passage of fluid, block the fluid, or any angle in between. It is popular due to its simple design and inexpensiveness.

Plug Valves Images

Check Valves

The check valve is used to prevent flow reversal in a system. The two most common designs are swing check and lift check. These operate by allowing flow in one predetermined direction through their body.

A swing check valve consists of a hinged disc that swings open when flow starts and closes due to either gravity or flow reversal. When fully open, the swing check valve offers less resistance than the lift check valve.

The lift check valve is used when pressure drops are not as critical. Its flow path is very similar to that of a globe valve, and is also opened when flow starts and closes due to flow reversal.

Most check valves are labeled with an arrow on the body’s exterior, which indicates the direction of flow and assists with proper installation.

Check Valves Images

Articles You May Like :

Different Valve Types

Facts About Control Valves

Final Control Elements

Solenoid Valve Tips

Piping & Instrumentation

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

Direct Acting Control Valves & Reverse Acting Control Valves
Solenoid Valve Failure in Plant Start-Up: Identifying the Root Cause
Control Valve Stroke Test Procedure
Purpose of 100% and 30% Feed Control Valves in a Power Plant
What is a Spool Valve? – Types, Configurations, Applications
Oval Gear Flow Meters – Principle, Advantages, Animation
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
208kSubscribersSubscribe
38kFollowersFollow

Categories

Explore More

Fundamentals of Valves and their Types
Working Principle of Self Operated Valves
Capacitance Level Transmitter Animation
What is a 4-way Solenoid Valve?
Top 80+ Valve Questions and Answers
Difference Between Solenoid Valve and Motorized Valve
Level Transmitter Animation
Electrical Actuators

Keep Learning

Rotameters Working

Rotameter Working Principle and Animation

Internal parts of relief valve

What is a Boiler Pressure Relief Valve?

Quick Exhaust Valve (QEV)

Quick Exhaust and Air Operated Valves in Instrumentation Circuit

valve actuator yoke

Advantages and Disadvantages of Valve Actuators

psv-principle-of-operation

Instrumentation Inspection Report

Microwave Barrier Level Switch Working Principle

Over Pressure cases for Pressure Relief Valve Sizing

Over Pressure cases for Pressure Relief Valve Sizing

Pilot operated Solenoid Valve Principle

How Pilot operated Solenoid Valve Works ?

Learn More

Strip-Chart-Recorder-Working-Principle

Strip Chart Recorder Working Principle

Industrial Internet of Things Projects

Top 100 Industrial Internet of Things Projects (IIoT)

Active Barrier

What is a Active Barrier ?

Captive Power Plant Trip Root Cause Analysis

Captive Power Plant Trip Root Cause Analysis

Differences between Watts and Volt Amps

Differences between Watts and Volt Amps

Basic DC Power Supply Circuit

Basic DC Power Supply Circuit

Types of Potentiometers

Types of Potentiometers – What is a Potentiometer? – Applications

Ammeter with Shunt

Ammeter

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?