Hydraulic Fittings

Hydraulic fittings use high pressure, fluid power and are designed and rated specifically for hydraulic lines. The fittings must be able to withstand higher temperatures, very high pressures in demanding environments where leakage or failure will cause work stoppage and, possibly, be injurious.

Hydraulic fittings are used to join tubing and hose used in hydraulic applications such as where special fluid is used, under high pressure, to control heavy equipment, braking systems, and bridging different stands together – such as an O-ring boss to a hydraulic JIG. Hydraulic fittings also used to incorporate bulkhead hardware, and to allow for proper component orientation. Other, unlisted uses of hydraulic fittings may also be available.

Fittings come in a variety for styles, depending on the application. Common styles include adapter, cap or plug, coupling, cross or 4-way, 45 or 90° elbow fittings, 30 or 60° fittings, pitless adapter, quick couplers, return or trap, tee, union, well cap, and wye. 

When choosing hydraulic fittings, connection selection is an important consideration that should be made based on the application. Some common examples of hydraulic fitting connections include ball and sleeve, cam-lock (male or female), crimp connections, flange or flare connections, threaded (male or female), straight or tapered connections, luer lock, and compression fitting. There are other, unlisted connection types that may also be considered.

Another factor to consider when choosing hydraulic fittings is the material type used. Fittings can be made from a variety of materials including aluminum, brass or bronze, composite fiberglass or graphite, ceramic, copper, polyvinyl chloride (PVC) or chlorinated polyvinyl chloride (CPVC), fluroresin, glass, cast or ductile iron, rubber or elastomer, polyethylene (PE), polypropylene (PP), carbon or alloy steel, and stainless steel.

Choosing material for hydraulic fittings should consider building codes and standards, compatibility with other materials within the hydraulic system, the fluids being transported, and the temperatures of both inside and outside of the hydraulic systems. 
 

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Part Numbers for Hydraulic Fittings