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LET-LOK® Tube Fittings
The LET-LOK range of connectors has been developed to fill
the rapidly increasing demand for tube fittings suitable for
high pressure use in environments such as petrochemical, fluid,
power, nuclear, electronic, as well as other major industries.
LET-LOK tube fittings have been carefully manufactured and
tested to withstand the demands of high performance tube fittings,
such as high pressure, impulse, vibration, vacuum and temperature.
These tube fittings are manufactured to exacting tolerances
using the most modern and advanced computerized automation.
 How
LET-LOK® Fittings Work
LET-LOK tube fittings are composed of four parts:
- Body
- Front ferrule
- Back ferrule
- Nut
The LET-LOK tube fitting is a mechanism used for both sealing
and gripping tubing. Through mechanical advantage and geometry
the fitting produces a leak-tight assembly.
Fitting Assembly
To assemble, simply insert the tube into
the complete assembly until the tube bottoms-out against the
shoulder of the fitting body. The two ferrules are driven
forward between the nut and fitting body using the mechanical
force created by rotating the nut clockwise.
The back ferrule
(3) is driven against the tapered rear of the front ferrule
(2) and the front ferrule is driven by force into the tapered
mouth of the body. The rear ferrule is swaged radially inwards
on the tube while lifting the front ferrule out to form a
full faced seal on the tapered surface of the body.
The 1
1/4 turn on the nut from the hand tight position assures
consistent drive of the sealing members. This ensures an
effective seal against high pressure as well as ultra high
vacuum conditions.
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