Fittings – Swagelok, Parker

Parker and Swagelok Fittings

Although Parker and Swagelok Fittings may look the same you should not in
any circumstances mix these fittings.

Swagelok Fittings

Swagelok tube fittings are made to exacting tolerances. Without such close tolerances, the interaction of the nut, two ferrules, and body would not be successful. If good quality tubing is used with Swagelok tube fittings, and installation instructions are followed, successful connections will result.
Swagelok tube fittings come in many different sizes from ¼” to 1” and 6mm to 25mm.

Swagelok tube fittings come to you completely assembled, finger-tight and ready for immediate use. Disassembly before use is unnecessary and can result in dirt or foreign material getting into the fitting which can interfere with sealing. For other connection types, see the fitting instructions for other Swagelok connections.

These fitting are installed in three easy steps.

Step 1

Simply insert the tubing into the Swagelok tube fitting. Make sure that the tubing rests firmly on the shoulder of the fitting and that the nut is finger-tight.

Step 2

Before tightening the Swagelok nut, scribe the nut at the 6 o’clock position.

Step 3

While holding the fitting body steady with a backup wrench, tighten the nut 1 1/4 turns. A Watch the scribe mark, make one complete revolution, and continue to the 9 o’clock position. By scribing the nut at the 6 o’clock position, there will be no doubt as to the starting position. When the nut is tightened 1 1/4 turns to the 9 o’clock position, you can easily see that the fitting has been properly tightened.
Swagelok gap inspection gages assure the installer or inspector that a fitting has been sufficiently tightened À For 1/16, 1/8 and 3/16 in.; 2, 3, and 4 mm size tube fittings,
tighten 3/4 turn from finger-tight.

Inspection Gauges

Swagelok gap inspection gages are designed to assure the installer or inspector that a fitting has been sufficiently pulled up into the fitting body on initial installation. They are particularly applicable to systems where fittings are installed in difficult or inaccessible locations or systems where insufficient pull-up could cause potentially dangerous or expensive consequences. Consistent gage ability ensures added safety and reliability. It is a Swagelok tube fitting feature that allows easy inspection for sufficient pull-up, before a system is pressurized.
Most Swagelok tube fittings are gauge able. Gap inspection gages are accurate only when all components are Swagelok components Once the system is in service, flow testing can begin.

Size and type of identification gauges available

For individual gauge sizes see the chart below:

Retightening Instructions

Often fittings have to be re-used and the following steps will provide you with a leak proof seal.
Fittings on sampling lines are often reopened and need retightening.

Step 1

Fitting is shown in the disconnected position.

Step 2

Insert tubing with preswaged ferrules into fitting body until front ferrule seats.

Step 3

Tighten nut by hand. Rotate nut to the original position with a wrench. An increase in resistance will be encountered at the original position. Then tighten slightly with the wrench. Smaller tube sizes will take less tightening to reach the original position, while larger tube sizes will require more tightening. The wall thickness will also have an effect on tightening.
The Swagelok gap inspection gage is not intended to be used when the fitting is retightened.

Preswaging Instructions

It is sometimes preferable to preswage the fittings before connection due to working in cramped conditions or maybe working at height. The following steps should be carried out.

Step 1

Assemble Swagelok nut and ferrules to preswaging tool or fitting. Insert tubing. Make sure the tubing rests firmly on the shoulder of the tool and the nut is finger-tight. Tighten nut 1 1/4 turns.

Step 2

Loosen the nut and remove the tubing with preswaged ferrules from the preswaging tool.

Step 3

The connection can now be made by following the Retightening Instructions shown on previous .
Although a preswaging tool can be used many times, it does have a finite life. After frequent use, ask your Swagelok representative to have it checked.
À For 1/16, 1/8 and 3/16 in.; 2, 3, and 4 mm size tube fittings, tighten 3/4 turn from
finger-tight.