There are many different types of valves that are used in systems, and the more complex the system is, the more likely there are to be multiple valves involved to provide complete control over the flow of the media. These valves can be automatic, controlled by equipment, or manually turned off and on depending on the specific location, the system design, and the purpose of the valve.
One of the most important types of valves in a pneumatic system is a pneumatic pilot valve. As with all valves in pneumatic systems, this valve is responsible for controlling the volume, pressure, and rate of air moving through a specific location.
The role of the pneumatic pilot valve is to pilot or control the flow of the air to another valve. In most applications, this valve is used specifically on systems with high pressure or with high volume flow through the system. The pilot valve is able to operate using a small amount of the pressure or flow to control the main valve. Without the use of the pilot valve, the main valve would constantly be exposed to this high pressure and high volume, which would require a much larger valve to offset the system parameters.
While solenoids can be used to control valves or automated valves with electrical signal capacity can also be used, this can be potentially hazardous in a variety of applications. The use of the pneumatic pilot valve removes any risk of sparks or heat generation, making them a safe choice.
There is a range of pilot valves that can be used for various applications. These valves can be exhausting or non-exhausting, and they can offer a two or three-way configuration. Generally, these valves are designed to be normally closed, and panel mounted, and they are also typically found with a 90-degree body configuration for standard types of applications.