pneumatic fitting, in general, is any connector intended to connect components or devices in a sealed and pressurized dry-air arrangement.

Today, pneumatic pipe fittings are used in a wide range of sectors and applications, from assembly and production line settings to various industrial machines, construction, handheld gadgets, and workbench equipment. In many professional situations, the power of a pneumatic system might prove to be more dependable, versatile, cost-effective, and safe than a similar configuration powered by various electric motors and actuators.

• Pneumatic fittings are frequently built for certain temperatures, and the application defines pressure ranges.
• The operational pressure range refers to the pressure classes, or pressure ranges that the fitting was designed to work in. In most cases, the operating pressure is expressed in pounds per square inch (psi). The fitting may fail if used above or below this rating; for example, it may break, leak, or lose its seal).
• The operational temperature range, given in degrees Celsius (°C) or degrees Fahrenheit (°F), is the temperature range or temperature classes the fitting was designed to work. The fitting may fail if you operate it above or below this grade.
• Other features of pneumatic fittings may be added to provide the capability necessary for specific applications.
• Bulkhead fittings are tube connectors on both sides of a barrier put in a wall or bulkhead.
• Expansion joints and couplings bring tube sections together and allow for movement due to service stress, load, or temperature cycles.
• Fittings with a liner are made with an integral lining. Linings are commonly created of tailored polymers for use with process materials or in applications where media sanitation is critical, such as food processing.
• Surface treatment, plating, or coating on plated fittings improves thermal properties, corrosion resistance, chemical endurance, or other desirable surface qualities.
• One or more fitting ends can swivel or revolve thanks to the swivel function.
• The most basic element of pneumatic fittings can be addressed: adequate sizing. Because larger or undersized parts are either completely incompatible or seal or join inefficiently, proper sizing of pneumatic fittings is critical to an excellent fitting preference.

Pneumatic fittings are available in various materials, including brass, stainless steel, plastic, and aluminum. The choice depends on factors such as compatibility with the working medium, corrosion resistance, and cost.