Pneumatic nipples and couplings 


All about pneumatic fittings: definition, types and use

Pneumatic fittings are parts used to connect sections of pipes, tubes and hoses in pneumatic (pressurized gas) systems.

What are pneumatic fittings?

Pneumatic fittings are used to transport compressed air. Compared to hydraulic fittings, pneumatic fittings are characterized by tighter seals and lower pressure requirements. Since pneumatic systems have a lot of variety and complexity, they require pneumatic installation of different shapes and purposes.

What are the different types of pneumatic fittings?

Pneumatic fittings are distinguished according to the type of connection and the function they perform. Pneumatic fittings are joined via a number of different connection methods, each with their own conveniences and advantages.

Ball and sleeve fittings:

Ball and sleeve fittings connect an outer sleeve to an inner (ball) fitting. The sleeve retracts to connect and disconnect the two ends of the fitting. Some ball and sleeve fittings function as one-touch fittings, convenient for applications requiring frequent disconnection and reconnection of the pipe section.

Compression fittings

Compression fittings include all types of fittings that use compression force to connect the vessel to the fitting.

Standard compression fittings use metal gaskets, rings, or ferrules that form a seal on the vessel by compression. Compression is usually done by tightening a nut on the fitting on the tubing and ferrule, compressing and securing the vessel inside. Standard compression fittings require no tools to assemble, making them convenient for quick field installations.

Bit type fittings:

are compression fittings that have a pointed ferrule that "bites" into the vessel when compressed and provides a seal. Bonded fittings, like standard compression fittings, require no special tools for assembly, but provide a stronger, more resilient connection.

Mechanical fittings:

Mechanical fittings are two-ferrule assemblies. The rear ferrule grips the vessel while pressing against the front ferrule, which spring-loads the ferrule and creates a tight seal between the tubing and fitting

body. These fittings can be reassembled multiple times without damaging components or piping. They have good resistance to mechanical vibrations.

Flare fittings:

Flare fittings consist of a body with a flared or tapered end. Special flare tools are used to install the vessel inside the flared end, ensuring a deep seal. Flare fittings can handle higher pressures and a wider range of operating parameters than standard compression fittings.

Crimp fittings:

Crimp fittings involve placing the pipe over a tubular end and crimping it with a sleeve, ring, or crimp plug. These fittings usually require crimping tools or machines to make the connections.

Quick connectors

Quick couplings are essential for connections that direct the flow of gas, air or water. Also called quick couplers or quick disconnects, they provide a quick connection for transferring fluids. Usually manually operated, they are an excellent alternative to threaded and flanged connections.

End fittings:

End fittings provide specific surfaces for connecting vessels in pneumatic systems.

What are the considerations in choosing pneumatic fittings?

When purchasing pneumatic fittings, consider these criteria:



Lightweight and corrosion resistant. By itself, aluminum has low tensile strength and is used for its corrosion resistance and low density in low pressure applications. It is alloyed with zinc, copper, silicon, manganese and/or other metals to improve its strength and hardness.

Pneumatic nipples and couplings