|
|
|
| |
|
Home
> Types of Tube Fittings
|
Tube Fitting Types
There are a variety of connection methods for tubing applications. Brief descriptions of the most common tube fitting connections are below.
Compression Tube Fittings
The compression tube fitting, which was the first tube fitting to be introduced, is typically made up of three components: nut, body, and gasket ring or ferrule.
The disadvantages of this type of connection are that it can withstand only minimal pressure and remake is extremely difficult due to the construction of the sealing ring. |
Compression tube fitting
|
Flare Fittings
The flare fitting was the next variation in tube fitting designs. This fitting is typically made up of a nut, sleeve, and body with a flare or coned end.
Special flaring tools are usually required to prepare the tubing for installation. Additionally, flaring of the tubing may cause stress risers at the base of the flare or cause axial cracks on thin or brittle tubing. |
Flare fitting
|
Bite-Type Tube Fittings
Accommodate higher pressure applications over the original compression design. Comprised of a fitting with a nut, body and ferrule(s) having a sharp leading edge, which bites into the skin of the tubing to achieve holding ability.
Bite-type tube fittings may be single or twin ferrule in designs. In the single ferrule bite, the nose of the ferrule performs two functions: bite into the tube to hold it and provide a sealing element for the coupling body. The twin ferrule bite utilizes grip by the back ferrule and seal by the front ferrule.
|
Single-ferrule bite-type
Two-ferrule bite type
|
Mechanical Grip-Type Tube Fittings
Mechanical grip-type tube fittings are typically two-ferrule in design. Fitting pull-up spring loads the front ferrule as it seals by coining the surfaces of the tubing and coupling body.
A radial colleting or holding action of the back ferrule grips the tube for a distance just out-board from the tube holding point of the ferrule nose to enhance vibration resistance.
Another strong advantage that this design offers over the bite-type fitting is that break and remake of the fitting after installation can be more successfully accomplished without damage to either the fitting components or the tubing.
|
Mechanical grip-type
(Hinging colleting grip-type)
| More Information
Download the Swagelok Gaugeable Tube Fittings and Adapter Fittings catalog.
Find tube fittings and tube adapters in the product search.
See tube fitting resource and reference documents.
See more details on: |
|
|
|
Find a
Sales & Service Center
|
|
|
|
|