Insert the tube in Comfit Tubing until the face of the tube in the fitting body as shown.
Finger tight the nut and mark it at 6 o’clock position as shown.
For high pressure application and to consider high safety factor tighten the nut until the tube does not turn by hand or move axially in fitting and then mark the nut at 6 O’clock position as shown.
Hold Fitting body steady, tighten the nut 1-1/4 turn from finger tight for fitting size in fraction 1/4″ to 1″, in metric 6mm to 25mm and 3/4″ turn from finger tight for fitting size in fraction 1/16″ to 3/16″, in metric 2mm to 4mm.
Never turn the fitting body. Instead hold the fitting body and turn the nut.
Prior to disassembly, mark a line along the nut and fitting body flats as shown. Ensure that the fitting body and tube assembly are free from contamination or damage
Insert the tube assembly into the fitting body until the front ferrules seats firmly. Assemble the tube and nut to finger tight position.
Rotate the nut until the previously marked position is reached. Once the previous position is reached, continue rotating the nut until you feel a significant increase in torque to ensure the assembly is proper sealed.
The appropriate selection of both tubing and its material is crucial. Tubing should always be free from pattern marks, scratches, and other surface imperfections. It’s important to avoid negative tolerance in the tubing. Additionally, the end of the tube must be free from any burrs resulting from pipe cutters or hacksaws
Proper swaging is influenced by the tube’s size, hardness, and thickness, as well as the appropriate application of torque. Below, we present some of the values determined at Comfit to help you understand better. Swaging should be carried out in accordance with these values
However Comfit always suggests swaging to be performed by attaining whole 1-1/4 turn of the nut for tube size 1/4″ to 1″ and 6mm to 25mm where as 3/4 turn of nut for tube size 1/16″ to 3/16″ and 2mm to 4mm irrespective of the tube thickness and hardness
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