Hydraulic Fittings Specifications

Help with Hydraulic Fittings specifications:

Size

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	English
	Metric
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	English Size
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	Metric Size
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Type

	Category
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	Tube Fitting		A tube fitting connects two or more ends of tube. The definition of a tube is a hollow cylinder that is used to transfer liquids or gases. Tubing is generally defined by the outside diameter and is fairly rigid in structure.
	Hose Fitting		A hose fitting connects two or more ends of hose. The definition of a hose is a hollow cylinder that is designed to transfer liquids and gases and is flexible in structure. Along with a flexible structure, a hose fitting has flexible use, meaning the fittings are not permanent.
	Pipe Fitting		A pipe fitting connects two or more ends of pipe. The definition of a pipe is a hollow cylinder that is used to transport material from one point to another. Generally, a pipe is defined by the inner diameter distance and is rigid in structure.
	Quick Coupler		A quick-action coupler is used in a hydraulic or pneumatic system to quickly connect lines without losing fluid or fluid pressure. All couplings consist of two mating halves: the plug (male) and the coupler (female). Couplers can be used under a variety of pressure and temperature conditions. Quick-action couplers are ideal for use in applications where fluid loss during connection or disconnection is undesirable. Typical applications include systems where tools or other devices are routinely connected and disconnected to a central pressure supply.
	Elbow		The fitting has an elbow configured for a 45° change in direction.
	Tee		Tee fittings have three-ports and are in the shape of a "T".  Standard configuration (equal) indicates that the straight-through path (typically called the run) and the perpendicular section (branch) all have the same size ports.
	Union		Union fittings have three-parts that connect two pieces of tube and allow for disconnection without cutting.
	Cross / 4-Way		The fitting has four connection ports, typically in the shape of a cross.
	Wye		Wye fittings have three-ports in the general shape of the letter "Y," or in which a branch departs the run at an angle other than 90°. The designation "equal" refers to the three outlets being the same size.
	Adapter		Adapters are fittings designed to connect different types of hose, tubing, or pipe together.
	Reducer		The fitting reduces in size. Example: inlet is 1/2 in. and the outlet is 1/4 in.
	Nipple		Nipple is a common description of a short, straight connector fitting, typically with male threaded ends.
	Swivel		The swivel feature allows one or more fitting ends to rotate or swivel.
	Coupling		A coupling is a device with female connections that connects two identical sections of hose, tube, or pipe.
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Connection

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	Compression Fitting		Compression fittings are used to connect to mating hose, pipe or tube. These fittings typically involve a compression nut and ferrule.
	Crimp		When using crimp fittings, a hose or tube is placed over a tubular end and crimped against it with a sleeve or crimp socket.
	Face Seal		Face seals typically incorporate O-rings that mate against the face of the opposite connector to form a seal. Depending on the standard, the O-ring may be on the nose of the male threaded connector, or behind the male thread on the face of the backing nut.
	Threaded		The port includes one or more straight threads, such as UNC, UNF, or other straight thread series.
	Weld		Plain end fittings can be connected by adhesive, solder, or other forms.
	Push-to-Connect / Push-On		Push-to-connect fittings have ends that are designed to accept the tubing by pushing it into the end. These fittings typically disconnect via some type of collar retraction.
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