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Pneumatic Couplings - What Are Their Constituent Materials

May. 09, 2022

HUADING

Pneumatic couplings are used to connect compressed air tools to compressed air lines. Pneumatic couplings allow the tool to easily connect or disconnect hoses or pipes under pressure.

In the pneumatic industry, pneumatic couplings are known by many names. For example, air hose couplings, compressed air couplings, pneumatic couplings or compressor couplings refer to the same product. Couplings can also be used instead of couplings. We will use all these names interchangeably in this article. Compressed air couplings are available in different variants for various applications. However, hoses and couplings must be suitable for the particular compressed air system.


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Quick coupling information

Quick release couplings are quick disconnect couplings used in hydraulic or pneumatic systems to quickly connect lines without loss of fluid or fluid pressure. Quick release couplings are designed to connect and disconnect immediately without the use of tools, thus eliminating the need to close valves, drain systems, refill fluids and/or remove trapped gases during disconnection and replacement of components. For this reason, they are particularly useful in production applications where speed is critical or time-dependent. Quick couplings can also save valuable time spent building or removing piping systems.


Quick Release Air Couplers and Plugs LU3-2


Materials

Materials for quick release couplings are typically selected based on the fluid being transferred through the system. Other selection factors include cost, flexibility, environmental conditions, and the desired pressure rating. Material options include different types of plastics or metals.


Metal

Aluminum

Lightweight and corrosion resistant. Aluminum is commonly used for piping and is the preferred fitting material for aluminum pipe. Aluminum itself has a low tensile strength and is used when high corrosion resistance is required.

Brass

Strong, durable, corrosion resistant, with high temperature ductility and good electrical conductivity. Brass is an alloy of copper and zinc and is a commonly used material for quick release fittings because of its workability and excellent performance characteristics.

Cast Iron

Strong and highly abrasion resistant. Cast iron fittings and tubes are primarily used in building construction for sanitary, storm drain, waste and vent pipe applications because they resist abrasive materials such as sand, gravel, solid waste and debris.

Copper

Extremely resistant to corrosion and has excellent electrical conductivity. Copper fittings are important for many plumbing and heating applications and are commonly used in residential water supply lines.

Steel

Durable and strong, with a high degree of heat resistance. Steel is an alloy of iron and carbon - it is often alloyed with other metals to improve its corrosion resistance and durability. Carbon steel is alloyed with a higher level of carbon to improve durability and strength.

Stainless Steel

Relatively strong, with excellent chemical and corrosion resistance. Stainless steel is a steel alloy containing more than 10.5% chromium, providing excellent corrosion resistance for sanitary applications as well as applications dealing with corrosive fluids and materials.


 Polyurethane Recoil Hose


Plastics.

PVC 

A rigid plastic available in a variety of pressure ratings. PVC couplers connect via threaded or solvent welded (glued) connections. Standard applications include cold water supply and drainage.

PE

A soft, flexible and tough thermoplastic - even at low temperatures. PE couplers have excellent electrical properties, but are less temperature resistant. They also have very good chemical resistance, but are susceptible to environmental stress cracking; they have poor UV resistance (unless modified) and poor barrier properties, except for water.

PP

A thermoplastic material with excellent cold flow, biaxial strength and yield elongation properties. It is similar to PVC but can be used in exposed applications due to its UV, weathering and ozone resistance.


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Applications

Quick connectors can be specifically designed and rated for a particular application or industry.

Chemical quick release couplings - Chemical quick release couplings can be designed for specific chemicals such as fuels, oils, solvents, acids, bases, etc.

Gas couplings - Gas quick release couplings are designed for explosive and toxic gases such as propane and phosgene.

Hydraulic couplings - Hydraulic quick release couplings are designed and rated for hydraulic lines.

Pneumatic Couplings - Pneumatic quick release couplings are specifically designed for use in compressed air lines and pneumatic systems.

Sanitary/Food Grade Couplings - For sanitary applications in the food, beverage, medical and pharmaceutical industries.

Water Couplings - Water quick release couplings are suitable for potable water, usually pressurized, for industrial, municipal and consumer use.



Longwei Auto Parts is specialized manufacturer of various air couplers, air blow guns, tire gauges and other repair tools and accessories, established in 2006 starting with a packaging production line. After decades of years efforts, we now have established R&D team, full production lines and have a professional testing system to ensure every piece out of our factory with 100% quality guarantee. Please contact us if you need, and we have great price for you.


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