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: Types of Pilot Operated Diaphragm Solenoid Valve Principle
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 > Types of Pilot Operated Diaphragm Solenoid Valve Principle

Types of Pilot Operated Diaphragm Solenoid Valve Principle

Last updated: April 13, 2019 2:29 pm
Editorial Staff
Control Valves Solenoid Valve
1 Comment
Share
2 Min Read
SHARE

2/2 Pilot Operated Diaphragm Solenoid Valve : Normally Closed

2/2 Pilot Operated Diaphragm Solenoid Valve : Normally Closed

Contents
2/2 Pilot Operated Diaphragm Solenoid Valve : Normally ClosedTo open:To close:2/2 Pilot Operated Diaphragm Solenoid Valve : Normally OpenTo close:To open:

To open:

when the valve receives an electrical signal, a magnetic field is formed which attracts the plunger covering the pilot orifice to lift off, causing system pressure (holding the diaphragm/piston closed) to drop.

As system pressure on the top of the diaphragm/piston is reduced, full system pressure on the other side of the diaphragm/piston acts to lift the diaphragm/piston away from the main orifice, which allows media flow through the valve.

Since the bleed orifice is dimensionally smaller than the pilot orifice, the system pressure can t rebuild on the top of the diaphragm/piston as long as the pilot orifice remains open.

Pilot Operated Diaphragm Solenoid Valve Symbol

To close:

when the valve is de-energized, it releases its hold on the plunger. Then the plunger drops and covers the main orifice.

The system pressure builds up on the top of the diaphragm/piston through the bleed orifice, forcing the diaphragm/piston down until it covers the main orifice and stops media flow through the valve

2/2 Pilot Operated Diaphragm Solenoid Valve : Normally Open

Pilot Operated Diaphragm Solenoid Valve Normally Open

To close:

when the valve is energized, it attracts the plunger. Then the plunger covers the pilot orifice.

The system pressure builds up on the top of the diaphragm/piston through the bleed orifice, forcing the diaphragm/piston down until it covers the main orifice and stops media flow through the valve.

Pilot SOV symbol

To open:

when the valve is de-energized, it releases its hold on the plunger. The plunger uncovers the pilot orifice causing system pressure holding the diaphragm/piston closed to drop.

As system pressure on the top of the diaphragm/piston is reduced, full system pressure on the opposite side of the diaphragm/piston acts to lift the diaphragm/piston away from the main orifice, which allows the full media flow through the valve.

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

Common Valve Abbreviations in US Engineering Drawings
Types of Valve Actuators
What is a 4-way Solenoid Valve?
Pilot-operated Relief Valve Principle
Control Valve Sequence Methods
Solenoid Valve Troubleshooting Practices
Share This Article
Facebook Whatsapp Whatsapp LinkedIn Copy Link
Share
1 Comment
  • Girish. says:
    December 19, 2016 at 8:06 pm

    Which book reffer for instrument knowledge

    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

Fluid Power Systems
What is Travel Stop in Control Valve?
How to Select Control Valve Failure Mode
What is Mixing or Diverting Valve ?
How is Pressure Drop Calculated through a Valve ?
Lessons Learned from Actuator Passing Incidents
What is Tilting Disk Check Valve ?
Components of Shutdown Valve

Keep Learning

Motor Operated Valve Problems and Troubleshooting

Motor Operated Valve Problems and Troubleshooting

Lift check valves

What is Lift Check Valve ?

Difference Between Solenoid Valve and Motorized Valve

Difference Between Solenoid Valve and Motorized Valve

Solenoid

Difference between AC and DC Solenoid Valves

Valve Interlock

Valve Interlock

Control Valves Leakage Classifications

Control Valves Leakage Classifications

valve plug and seat damage

Control Valve Erosion Problems

Cavitation Test Setup

Cavitation Test Setup

Learn More

Functional block diagram for analog alarms

PLC Logic for Analog Alarms using Functional Block Diagram

Steam Pressure Taps Primary Block Valves Glands and Bonnets Leaks

Instrument Steam Pressure Taps Primary Block Valves Glands and Bonnets Leaks

DeviceNet

What is DeviceNet?

ACSR (All Aluminium Conductor Steel Reinforced)

What is an Overhead Cable? Types of Overhead Conductors

Loop Diagram

15 Loop Diagram Questions

Process-Variable-to-Percentage-Conversion

Formula for Process Variable to Percentage Conversion

Difference between Transmitter and Transducer with Examples

Difference between Transmitter and Transducer with Examples

What is Instrument Air Manifold

What is Instrument Air Manifold ?

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?