Tube Fittings are internally silver plated for dry lubrication purpose which result in reduction of torque during assembly and also extending Fittings life by preventing galling across wide range of temperatures.

Hardness of the Raw material used for the Ferrules is higher than the hardness of the tube recommended and precision machining combined with sharp uniform biting edge ensures precision leak free connection between Tubes and Body. The primary seal points of a twin ferrule system are:

• Compression seal between the nose of the front ferrule and body seat.
• Compression seal between the nose of the front ferrule and the tube.

Precision machined Back Ferrules ensures a firm mechanical and vibration free grip on the tube.

The secondary seals for a twin ferrule system are:

• Compression seal between the nose of the back ferrule and the back of the front ferrule.
• Grip (limited bite) seal between the nose of the back ferrule and the tube.

The secondary seals backup the tube seal only and both must work to prevent a leak.

The front ferrule is a compression seal and may not seal some tube imperfections (scratches, weld seams, etc.).

FLUID-LOK Tube Fittings undergoes Burst pressure test. The details of Test Result are as under:

TUBE ODT	TUBE WALL THICKNESS	ALLOWABLE WORKING PRESSURE	TESTED TO BURST PRESSURE OF TUBE
6mm	1.0mm	497 bar	1775 bar
8mm	1.0mm	440 bar	1598 bar
10mm	1.0mm	342 bar	1287 bar
12mm	1.2mm	359 bar	1334 bar
18mm	1.2mm	230 bar	872 bar
25mm	1.5mm	220 bar	844 bar
1/4"	0.035"	5100 PSI	21338 PSI
3/8"	0.035"	4800 PSI	20379 PSI
1/2"	0.049"	5100 PSI	20390 PSI
3/4"	0.049"	3300 PSI	13112 PSI
1"	0.065"	3200 PSI	12998 PSI

The above Result indicates that, at burst pressure and even after the tube is burst the FLUID-LOK Tube Fittings did not slip from the Tube which is AUTHENTICALLY PROOVES that the FLUID-LOK Tube Fittings are reliable and capable of withstanding high pressure applications.