What Is a Hose Coupling?

For the transportation of fluids for hydraulics and other fluid assemblies, hoses are a crucial component that are widely used. As flexible and hollow tubing that may be used to transport fluids, hoses are useful for many fluid applications as they can be designed with high strength while remaining bendable for less constrictive installation. While the hose itself is important for transferring fluids, the hose coupling is paramount as it is what serves to connect the hose to pumps, taps, and even other hoses. As the coupling is the point of connection where fluids must pass through without facing leaking or pressure loss, it is paramount that the hose coupling is designed with high performance characteristics.

Hose couplings can go by various other names, often being referred to as hose fittings, hose connectors, or hose adaptors. Additionally, such components may be produced from a variety of materials to accommodate different environments and applications, and brass, steel, plastic, stainless steel, and aluminum are all common. For a simplistic application such as gardening, a plastic hose coupling may be sufficient to carry out needs without much issue. For aircraft on the other hand, low weight, durability, and water resistance is paramount for safe operations, thus aluminum is the regular choice for such assemblies. Despite materials such as stainless steel and aluminum having higher strength characteristics, one should always keep spare hose couplings regardless for quick replacement in the case of a breakdown or malfunction.

Just as there are many materials that may be used to construct a hose coupling, a number of types also exist to accommodate varying systems and applications. As forming a tight seal at the point of connection is very important, various coupling sizes and angles are available for optimal fits, and many couplings will have gasket components to ensure a seal. Gasket components are common to a number of hose couplings, including various non-threaded gender types, threaded coupler types, and flanged couplings. Beyond the implementation of gasket components, some hose coupling assemblies will also use other part types such as a coupling valve, wing nut, and more in order to best manage fluids and ensure a tight fit and seal.

While materials and additional components may be useful for a variety of applications, one of the most important characteristics to be aware of is the coupling’s ability to withstand pressure. Often measured in bars or psi, the ability of a hose coupling to withstand high amounts of pressure will dictate whether it is fit for a high performance application such as a hydraulic system or if it is more fit for simplistic assemblies. In some cases, one may even be able to find high pressure hose coupling components that are flexible to allow for more diverse uses. Additionally, many couplings may also permit quick connection and disconnection for easier use.

Beyond the aforementioned characteristics, there are also other considerations that should be made when searching for the right coupling. To find the most optimal hose coupling for a given assembly, one should note the hose size, seat angle, seat type, thread pitch, maximum temperatures, and flow needed. Furthermore, the threading on the coupling is also crucial, as smooth installation will require correct mating capabilities otherwise damages may occur.

Finding the correct hose coupling will often require various considerations, but once you have found the right fit, NSN Axis is here to help you secure all you need at competitive prices. NSN Axis is a trusted distributor for all types of aircraft parts, and we can help you source the wing nut, gasket, rubber hose, and other hose coupling components that you may need for your operational requirements and maintenance endeavors. If you would like quotes on items for your comparisons, take advantage of our RFQ system and a dedicated account manager will be in touch within 15 minutes. Get started today and see why customers steadily choose NSN Axis for all their needs.


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January 8, 2021
December 2, 2020

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