5 Tips For Using Elimination Process To Identify Hydraulic Hose Fittings

February 8, 2022

There is plenty of industrial equipment and machines designed and made all over the world. Even the hydraulic systems come in various types of adapters and fittings with many sealing techniques and thread forms. Most of the time, the sealing techniques are differentiated through their appearance, while the thread forms look similar. It makes identifying each piece challenging and time-consuming each time you need to use one. However, identifying hydraulic hose fittings is still possible through an elimination process. 

Here are several useful tips for identifying hydraulic hose fittings with as few mistakes as possible. 

#1: Identify The Type Of Fitting 

There are two types of hydraulic hose fittings, the permanent one, and the reusable. The permanent type, also called crimped hydraulic hose fittings, is most useful for the fluid power industry because they are easier and less complicated to connect compared to reusable fittings. It is also the more reliable one between the two. If you want to use a cramped fitting, you must have a crimping or swaging tool. You must squeeze the fitting into the hose during the assembly. 

Meanwhile, the reusable hydraulic hose fittings are now considered “old school” technology. The field hose fittings can be easily recognized as it can fit correctly into a hose when attached with a vice and wrench. However, the reusable fittings may cost more compared to the permanent fittings and may take more time to assemble. 

#2: Be Familiar With The Fitting Ends, Ports, And Connectors

It is crucial to know how to identify the ports and connectors used in hydraulic systems accurately. You need to determine the correct type of tube or hose before you can start the assembly and installation process. 

#3: Determine The Sealing Method

The kinds of hydraulic fittings differ depending on various factors like sizes, thread types, and configuration. The three main types of hose fitting available in the market include the O-ring, the mated angle, and the threaded hose fitting. 

The O-Ring comes with various seal designs. With these kinds of coupling, you will find an O-ring seal that serves as the main part used in making the seal. The mated angle, on the other hand, comes with straight or parallel types of threads used for sealing. Meanwhile, the tapered threads are typically avoided in pneumatic and hydraulic systems since it tends to contaminate and shred.  

#4: Inspect The Fitting Design 

Once you identify the sealing method, you need to carefully inspect the area of the O-ring, the seat angle, the nose seat, and the fitting termination. It would be easier to see the O-ring location and the kind of nose seat in the equipment, but you must utilize a seat gauge to know the seat angle. 

#5: Measure The Thread

By using a caliper, you can measure the diameter of the thread of the largest point found on the male threads. You also need to know the measurement of the inside diameter of the female threads. Then use a thread gauge to know the number of threads for every inch. If you compare the gauge and the coupling threads against the lighted background, you will have a guaranteed accurate reading. 
These are the helpful tips to help you determine the kinds of hydraulic hose fittings using the elimination process. If you know the right type of fitting to use, it will help make your equipment more efficient and productive. 

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