Hydraulic systems play a crucial role in various industrial and mechanical applications, and the fittings used on hydraulic hoses are equally important to ensure the system's efficiency and safety. There are several types of fittings used on hydraulic hoses, each serving specific purposes and adapted to different working conditions.
Crimped fittings are a common type of fitting used on hydraulic hoses. They are permanently sealed with a crimping machine, which ensures a secure and leak-proof connection. This type of fitting is typically used in high-pressure applications where a strong and reliable connection is essential. The crimping process involves compressing a sleeve or ferrule around the hose and fitting, creating a tight seal that can withstand high pressures and fluid flows.
Another type of fitting used on hydraulic hoses is the field attachable or reusable fitting. These fittings have a socket and nipple and can be installed anywhere without the need for crimping equipment. They offer greater flexibility and convenience, especially in situations where crimping equipment is not available or where the fitting needs to be replaced frequently. Field attachable fittings are often used in low to medium-pressure applications, such as vacuum and coolant systems.
Within the categories of crimped and field attachable fittings, there are several specific types of fittings commonly used on hydraulic hoses:
Threaded fittings are connected by screwing them together. They are available in various thread types, including NPT, BSPP, and BSPT. Threaded fittings are often used in applications where the fitting needs to be easily disconnected and reconnected.
-Flare fittings are identified by either an AN or MS number and are commonly used in aircraft hydraulic systems. They have a flare cone at the end of the fitting, which is compressed onto the hose to create a seal. Flare fittings are available in aluminum alloy, steel, or copper base alloys and are color-coded for easy identification.
Flareless Fittings
-Flareless fittings are similar to flare fittings but do not require a flare cone. They use a crimp sleeve or ferrule to secure the hose and fitting together. Flareless fittings are often used in applications where space is limited or where it is difficult to flare the hose end.
-Permanent fittings, such as Permaswage, Permalite, and Cyrofit, are designed for permanent installation and are often used in high-pressure and critical applications. They are installed using specialized tools and cannot be easily removed or replaced.
-Universal bulkhead fittings are used to support a line that passes through a bulkhead. They have straight machine threads similar to those on common nuts and bolts and require flared tube connections, crush washers, or synthetic seals to make the connections fluid-tight.
-Tapered pipe thread fittings create a seal by wedging the tapered external male thread and the tapered internal female threads. This type of fitting is commonly used in household plumbing and automotive applications, as well as in some hydraulic systems.
The type of fitting used on a hydraulic hose depends on various factors, including the pressure rating, the type of fluid being transported, the environment in which the hose will operate, and the ease of installation and maintenance required. Crimped fittings offer a permanent and secure connection suitable for high-pressure applications, while field attachable fittings provide greater flexibility and convenience. Within these categories, there are several specific types of fittings to choose from, each with its own set of advantages and applications. When selecting a fitting for a hydraulic hose, it is important to consider all these factors to ensure the best possible performance and reliability of the hydraulic system.
