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Hydraulic couplings or fluid couplings are mechanical devices used to connect fittings and hoses which are used to transfer rotating mechanical power in high-pressure hydraulic systems.
These couplings allow us to attach and detach hoses and fittings very quickly and with ease. They are designed to handle high pressures above normal ranges.
Hydraulic couplings often undergo extreme conditions of temperature and oil degradation. This dictates that the couplings must be made from aluminum or brass materials that can withstand such working conditions.
It is also essential for these substances to be spark-free as oils at high pressure can be highly flammable.
There are basically two different types of coupling, namely, screw-on types and quick release.
- The screw-on types work in the same way as conventional screw-on couplers. There are two halves that are connected by lockin on the internal threads on one end to the outer threads on another.
- The quick-release type of couplers come with a circular row of ball bearings around the entrance on one end. The other end has a belled section seated in a matching chamber behind the ball bearings. The bearings are pushed down by a spring that is held firmly behind the chamber, ensuring a secure joint.