Hydraulic Adapters

Hydraulic adapter and fittings are key components in any hydraulic system. They are designed as leak free solutions when connecting hose or tubing assemblies to components such as pumps, cylinders, PTO’s and filtration units.

What Should Be Considered When Buying A Hydraulic Adapter?

The three factors to consider when choosing a hydraulic adapter or fitting are material, thread type and pressure rating.

What Materials are used to Manufacture Hydraulic Adapters?

Hydraulic adapters and fittings are typically constructed from one of following three materials depending on the type of fluid conveyed, the pressure ratings needed, and the environmental conditions present outside the system.

  1. Carbon steel is very durable with a high tensile strength. The working temperature range is –65° to 250°F (–54° to 121°C). Carbon steel fittings and adapters are typically plated with an environmentally friendly zinc-nickel alloy for corrosion resistance. Other coatings are also available for extremely corrosive environments.
  2. Stainless steel also exhibits high tensile strength and is highly chemical resistant. This material is suitable for applications that are too corrosive for plated carbon steel products. Stainless steel fittings and adapters are often used in open pit mining, oil and gas and military applications.
  3. Brass exhibits lower tensile strength than carbon or stainless steel. It is best suited for marine applications.

What thread and connection types are available?

Amazon Hose and Rubber can supply fittings and adapters utilizing the following configurations:
NPTF (National Tapered Pipe)
NPSM (National Pipe Straight Hose)
JIC (37 Degree Flare)
SAE O-Ring Boss
O-Ring Face Seal
Code 61, 62 and Caterpillar split flanges
BSPP (British Standard Pipe Parallel)
BSPT (British Standard Pipe Taper)
DIN (German/European Metric)
JIS (Japanese Industrial Standard)

What is the required pressure rating?

The pressure rating for a hydraulic adapter or fitting is dependent on the materials and thread types utilized. The product chosen must meet the pressure requirements of the system. When using an adapter or fitting with two thread types (ie. NPT X O-ring Face Seal), the pressure rating defaults to that of the lowest thread rating. Please follow manufacturers published recommendations.

Helpful Links and Downloads:

How to identify fluid ports and connectors from Danfoss

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