Generally, pneumatic valves control the flow of compres […]
Generally, pneumatic valves control the flow of compressed air. They can be used for many different applications, including depressurizing a system, shutting off a supply of air in case of a hazardous situation, or fine-tuning a system. They are used in both low-pressure and light-duty applications.
There are two types of pneumatic valves: electro-pneumatic and manual. In general, electro-pneumatics use an electro-pneumatic actuator to control the valve's flow. Manual actuation uses a hydraulic actuator. The two types of valves are similar in operation, but they have different advantages and disadvantages.
Electro-pneumatic valves use the balanced spool principle. It is based on the idea that stress waves bounce back from one end of the spring to the other. The stress wave in a coil piles up, causing the spring to expand. The coils then bounce back and return the spring to its original position. This process accelerates the rate of metal stress cycles.
Pneumatic valves have many different flow paths. In some cases, the flow path is blocked. The point where the flow path touches a box is called a port. If the port is blocked, the air cannot pass. The port is also used as an outlet.
Some valves are mounted on a manifold, which saves tubing. This also makes it easier to install. The manifold is also equipped with pressure regulators and check valves. Some valves also have flying leads.
Pneumatic valves can be made from cast metal or aluminum and plastic. This combination makes them sturdy and lightweight. They are suitable for a variety of applications, including medical and food processing. They can also be used in explosive environments.