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Pneumatic systems have a lot of components that are used to manage how the air and the pressure will move within the system. These components include one important one known as a valve. These Festo valves are responsible for managing the pressure, rate, and air amount when it is moving in a pneumatic system. There are multiple applications in industries that use these systems that can transmit power that is based on compressed air passing through the pneumatic system.

From pneumatic pressure power tools to diesel engines, these are an example of such a pneumatic system that’s based on compressed air being passed from the system. Let’s have a look at the types of Valves.

What Are The Types Of Pneumatic Valve?

#1 Two Way Directional Valve

This type of valve passes air in two directions, which has two different ports that can be either open or closed. If one of the valve ports is closed then there is no possibility of air to flow from the valve. If these ports are open, air can move inside the valve via one port and move out via another port. 

#2 Three Way Directional Valve

This type of pneumatic valve has 3 ports, every port is there for a different purpose. The first port in the valve can be used to connect it to a cylinder. For the air to flow in the valve, the second port is used. For the air to exit out of the valve the third port is present. In this valve, if two valves are open, then the third one has to be closed. The air can move inside the system with the help of the valve during this time. When one port is open and two opposite ports are open then the air circulating inside the system goes out of the third port. These valves are mostly used to connect with double-acting cylinders. 

#3 Four Way Directional Valves

Just as the name suggests, this one has 4 different ports available, out of them, two will connect to pneumatic cylinders, third will be used for the air to enter the valve, and the last one that’ll act as an exit for the air. These types of directional valves are known to be the most common type of valves that can be found easily in most areas since there are four ports the allow the valve to reverse the movement of a pneumatic cylinder.

#4 Spring Offset

This type of valve is classified based on the direction the air is flowing inside the pneumatic system. Take an example, the ports of the valves will either be closed or opened, that would mean that either the air is flowing through the system and valve or it’s not flowing at all. For the valve to become open or closed, the pneumatic cylinder generally moves the valve. A spring is used in order to return the valve into the previous position. Hence a valve that’s originally a two-way directional valve but acts a similar way then it’s known as spring offset valve.

#5 Open vs Closed Resting State

If a device is open and in a resting position the air can move freely. If the device is closed and resting then the air won’t be able to pass through the system. But if the system is a three-way directional valve like a Festo Pneumatic valve has, where one port is always open, even then the air won’t be able to pass through if the system is not turned on Airflow, is blocked in a closed resting state.

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