Understanding the Different Types of Pneumatic Valves

pneumatic valves

Pneumatic valves are a type of main component pneumatic systems use to control the amount of material, the rate, and the pressure at which a substance is moving through a pneumatic system. Pneumatic systems are entirely dependent on the force of the material that’s any system to transfer power.

While pneumatic systems are commonly found in the power tools that are used to work on diesel engines, you can also find pneumatic systems in a laboratory setting. Many types of industrial applications used pneumatic systems to transmit power. But how many different types of pneumatic valves are there?

In this guide, we’re going to cover the different types of pneumatic valves that you can find on in our pneumatics store and the market and which one may be the best for your project. We’re also going to discuss key information on it the specification and the configurations that are commonly associated with you different types of pneumatic valves.

Keep reading to learn more.

Types of Pneumatic Valves

Also commonly referred to as directional control valves, there are different classifications that a Pneumatic valve may meet. These different classifications will use a variety of approaches, some of which include: 

  • The position that the pneumatic valve is in when it’s in the un-actuated state
  • The number of switching positions that the pneumatic valve has
  • The number of flow paths that the pneumatic valve has
  • The number of exit ports the pneumatic valve has
  • The number of entry ports that the child has
  • The mechanism that’s used to close the ports
  • The mechanism is used to open the ports

The primary types of Pneumatic valves you’ll find are: 

Are you interested in learning about what each type of pneumatic valve offers and How to identify the best one for your project? Let’s take a closer look at each type of pneumatic valves: 

Closed Resting State vs Open Resting State

There are two different positions that a two-way directional spring offset valve when the connected actuator isn’t being used. These are referred to as the closed resting state or the open resting state. 

When airflow is blocked, this is referred to as they closed resting state. When the airflow is moving freely throughout the pneumatic system, this is referred to as the open resting state.

In three-way valves, there will always be one port that is open. As a result, this causes the airflow to be blocked when it’s in a closed resting state. So, unless the pneumatic system is currently on, there won’t be any pressure moving throughout the system.

Spring Offset

The way that the direction of the airflow is changed is what’s responsible for classifying the type of pneumatic valve.

This means that in a two-way directional valve, the valve will either be open or closed. This results in the airflow either being enabled or disabled.

When a valve spools its place into position with the help of an actuator, this results in the port to continue staying in an open position or a closed position. For the valve to move back into the position that it wasn’t previously, the spool has to be released.

The spring offset is what is responsible for releasing the spool.

Two-Way Directional Valves

As discussed above, a two-way directional valve will have airflow that moves through open ports or closed ports. If there isn’t any air flowing through, this means that the valve ports are closed. When the first port is open, it will be able to move in the opposing direction towards the second port.

Three-Way Directional Valves

Each port on a three-way directional valve has a unique purpose. One of the ports on a directional valve acts as a type of exhaust release, while another is responsible for hooking the valve up to an actuator, while the third port is responsible for connecting to the airflow.

When there are two ports opened on a three-way directional valves, one of the ports will stay closed. If there are two different valves that open up, and another valve closes, the exhaust will be vented. 

Four-Way Directional Valves

A four-way directional valve will have one port that works as an exhaust release, another that acts to connect to the airflow, and if the other two ports are responsible for connecting to an actuator.

Four-way directional valves are most commonly used to create a distinct past that allows a basic motor or a simple cylinder to have their motions reversed. You will probably find four-way directional valves to be used when there is a need for dual pressure. However, the access port is found on this type of directional valve can also be used to act as a second exhaust exit.

Finding the Best Pneumatic Valve for Your Project

When it comes time for you to choose a pneumatic valve for your project, understanding the different types of pneumatic valves and their functions will help you to choose the best-suited type of valve for your project.

We hope that this article has presented a clear understanding of the different types of pneumatic valves, how each type is configured, and what specifies one type of pneumatic valve over the other.

Are you looking for more information in regards to pneumatic valves? Click here to visit our web store, where you can find the highest quality pneumatic valves available on the market.

Or contact us at 562-946-8459 or email info@tpcautomation.com to speak to a pneumatics expert about our products.

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