Pneumatic systems are widely used to automate mechanical processes. These systems consist of a variety of parts, one of which is an air fitting. Air fittings are used in various applications apart from pneumatics. But despite how common air fittings are, some still experience difficulties in selecting the right air fitting for a pneumatic system.
The function of an air fitting
Pneumatic air line fittings carry compressed air and connect various parts of the system. Unlike fittings used in a hydraulic system, air fittings used for pneumatics require lower pressure and have tighter seals. Since pneumatic systems are also more complex and varied, fittings are equally available in different sizes, and some have specific functions. In general, the advantages of pneumatic air fittings include:
- Economical, easy to replace and maintain
- Some air fittings are compatible with applications exposed to water
- Wide variety of options to meet different application requirements
Choosing a pneumatic air fitting also depends on several factors, such as the working environment, pressure, temperature, shape, size, material, and fluid type.
Different types of pneumatic air fitting
Air fittings are usually selected according to the kind of material used. Here is a list of the various air fittings used in most pneumatic applications.
- Plastic push-in air fitting. A standard type of air fitting is commonly made of polyurethane or nylon tubing. It is suitable for ordinary working environments where the system uses compressed air. The advantage of plastic is that it is lightweight and works in high-pressure applications. Plastic is also an economical choice. However, it is not suitable for applications exposed to high temperature.
- Brass push-in air fitting. In general, a brass push-in fitting is nickel-plated, but some manufacturers also use glass-reinforced nylon. One of the main advantages of brass is the easy disconnection and reconnection, which makes this type of air fitting best for applications that require frequent replacements.
- Stainless steel push-in air fitting. Air fittings made of stainless steel are versatile and suitable for applications in various working environments, temperature and pressure ranges. It facilitates easy change and disconnection. Another advantage of stainless steel air fittings is the superior clamping capacity when used with different types of tubes. The anti-corrosive property of stainless steel also makes it an excellent choice for applications such as robotics and conveyor systems.
- Pneumatic compression fitting. This type of pneumatic fitting uses a nut or screw to compress the device. Compressing ensures that the connection has a tight seal. These fittings are typically made of brass and are compatible with plastic, aluminum, and copper tubings.
With the variety of air fittings available, finding the right one is not a challenging task. However, it is essential to coordinate closely with the manufacturer to ensure that the unique requirements of the application are met. Air fittings are critical to the robustness of a pneumatic system. If you choose an incompatible piece for your pneumatic assembly, it is possible for the system to perform poorly and cost more over time due to frequent replacements and repairs.
