Gaugeable Tube Fittings and Adapter Fittings 65


Installation Instructions Positionable Elbows and Tees


1. Turn the positionable end into the female fitting until the metal backup washer contacts the face of the fitting.


Lock nut


Backup washer


2. Turn the positionable end out of the female fitting (not more than one turn) until the Swagelok tube fitting end is positioned properly.


3. While holding fitting body steady, tighten the lock nut until the metal backup washer contacts the face of the fitting.


Tube Adapters Fig. 1


Female pipe port on existing equipment


Fig. 2


Up to 1 in./25 mm


1. Install the end opposite the tube adapter end (Fig. 1).


2. Insert the tube adapter into the Swagelok tube fitting. Make sure that the tube adapter rests firmly on the shoulder of the tube fitting body and that the nut is finger-tight (Fig. 2).


3. Mark the nut at the 6 o’clock position.


4. While holding fitting body steady, tighten the nut one and one- quarter turns to the 9 o’clock position.


For 1/16, 1/8, and 3/16 in.; 2, 3, and 4 mm tube fittings, tighten the nut only three-quarters turn to the 3 o’clock position.


Weld Fittings


Welding Precautions for Swagelok Tube Fittings with Weld End Connections 1. Remove the nut and ferrules.


2. Turn a Swagelok tube fitting plug or another nut onto the fitting so that it is finger-tight. This protects the threads and sealing components.


3. Provide a suitable heat sink to dissipate the heat.


4. Tack weld at four positions 90° apart to hold the fitting in place and to ensure alignment and concentricity of the components.


Depth Marking Tool Fig. 2


Fig. 1


5. Complete the weld. 6. Remove the plug or nut and replace the nut and ferrules.


 Caution: When welding carbon steel fittings, the heat often removes the protective oil from the threads.


It is important to apply another lubricant, such as Goop® thread lubricant.


Over 1 in./25 mm


Swagelok tube adapters over 1 in./ 25 mm are furnished with nuts and preswaged ferrules.


To assemble, follow steps 2 through 5 of the Swagelok tube fittings over 1 in./25 mm assembly instructions, page 63.


 Do not use the Swagelok gap inspection gauge with preswaged


tube adapter connections over 1 in./25 mm.


Reassembly


See Swagelok tube fitting reassembly, page 63.


1. Insert cleanly cut, fully deburred tube into the depth marking tool (DMT) until the tube is against the shoulder of the tool. Using a pen or pencil, mark the tube at the top of the DMT (Fig. 1).


2. Remove the tube from the DMT and insert it into the Swagelok fitting until it is against the shoulder


of the fitting body (Fig. 2). Rotate the nut finger-tight. If any portion of the mark on the tube can be seen above the fitting nut, the tube is not fully inserted into the fitting.


3. While holding the fitting body steady, follow Swagelok tube fitting installation instructions, page 63.


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