Technical Training

• Working Temperatures

Thread Ends

The working temperatures of the thread ends may be limited by the Teflon tape or thread sealant or, when applicable, the gaskets or O-rings as follows:

Installation Instructions
FITOK Tube Fittings up to 1" or 25 mm
   - Manual InstallationInitial installation
1. Loosen the nut 1/4 turn from finger-tight position.
2. Insert tubing into the tube fitting, make sure that the tubing rests firmly on the shoulder of the port.
3. Finger-tighten the nut.
4. Tighten the nut 1 1/4 turns with wrench while holding the body of the fitting or the valve steady (Fig.1).
For small-sized fittings (1/16", 1/8" and 3/16", 2 mm, 3 mm and 4 mm), tighten the nut 3/4 turn with wrench (Fig.2). Re-installation
1. Mark the tube at the back of the nut, mark a line along the nut and fitting body flats.
2. Insert tubing with preset ferrules into the fitting body until the front ferrule seats.
3. Hold the fitting body steady, then rotate the nut with a wrench to the previous pulled-up position as indicated
by the marks on the tube and the flats.
4. Tighten the nut slightly with wrench.
   - Installation with Manual Presetting Tool
Initial installation
1. Hold the presetting tool steady.
2. Install the nut and ferrules onto the presetting tool.
3. Insert tubing into the presetting tool, and make sure the tube rests firmly on the shoulder of the presetting tool.
4. Finger-tighten the nut.
5. Tighten the nut clockwise 1 1/4 turns with wrench (Fig.1); For small-sized fittings (1/16", 1/8" and 3/16", 2 mm, 3 mm and 4 mm), tighten the nut 3/4 turn with wrench (Fig.2).
6. Mark the tubing at the back of the nut before disassembling the fitting.
7. Loosen the nut and insert the tubing with preset ferrules into the fitting body until the front ferrule seats against the fitting body.
8. Hold the fitting body steady, then rotate the nut with a wrench to the previous tightening position as indicated by the mark on the tubing.
9. When you feel a significant increase in resistance, further tighten the nut slightly.
Re-installation
Same as the re-installation steps for manual installation for fittings up to 1" or 25 mm.

   - Installation with Hydraulic Presetting Tool
Only applicable for tube fittings from 1/2" to 1" and 12 mm - 25 mm.
Initial installation
1. Preset the ferrules onto the tubing using FITOK Hydraulic Presetting Tool. For details, refer to Instructions of Hydraulic Presetting Tool.
2. Install the preset assembly (tubing, nut, front and back ferrules) into the fitting body. Finger tight the nut.
3. Further tighten the nut 1/2 turn with a wrench while holding the fitting body steady.
Re-installation
Same as the re-installation steps for manual installation for fittings up to 1" or 25 mm.

FITOK Tube Fittings over 1" or 25 mm
Initial installation
1. Preset the ferrules onto the tubing using FITOK Hydraulic Presetting Tool. For details, refer to Instructions of Hydraulic Presetting Tool.
2. Install the preset assembly (tubing, nut, front and back ferrules) into the fitting body. Finger tight the nut.
3. Further tighten the nut 1/2 turn with a wrench while holding the fitting body steady.
Re-installation
Same as the re-installation steps for manual installation for fittings up to 1" or 25 mm.

Plugs
Initial installation
Tighten the plug 1/4 turn from finger-tight position with wrench while holding the body of the fitting steady.
For small-sized fittings (1/16", 1/8" and 3/16", 2 mm, 3 mm and 4 mm), tighten the nut 1/8 turn with wrench.
Re-installation
Tighten the plug slightly with wrench from finger-tight position.

Port Connectors
The initial installation and re-installation for the tube end is the same as those of tube fittings and the non-tube end same as those of the plug.

Cautions:
1. Do not loosen or tighten fittings when the system is pressurized.
2. Make sure that the tubing rests firmly on the shoulder of the port.
3. Always leave enough straight length of the tubing for the fittings.
4. Always use an insert for extremely soft plastic tubing.
5. Material of the metal tubing should be softer than that of the fitting. For example, stainless steel tubing should not be used with brass fittings. When tubing and fittings are made of the same material, the tubing must be fully annealed.
6. The allowable working pressure of the tube fitting is rated to the maximum working pressure of the corresponding tubing, which can be found in FITOK tubing data sheet. For those which can not be found in FITOK tubing data sheet, please
contact FITOK Group or our authorized distributors for related information.
7. Keep the tubing end and surface clean and smooth.
8. Always use proper thread sealants on tapered pipe threads. Make sure that its working temperature does not exceed that of the sealants.
9. When assembling the tube fitting, hold the body with a wrench and turn the nut instead of holding the nut.
10. When installing a valve with tube fitting end, hold the valve body with a wrench and turn the nut.
11. When assembling the fitting to a valve with thread, hold the valve body with a wrench and turn the body of the fitting.
12. Gap Inspection Gauge is ONLY accurate for initial installation by manual operation.