What is LET-LOK Fittings and How Does it Work?

To guarantee leak-tight tube systems, it is essential to carefully select first-class tubing, such as those developed by the HAM-LET Group since the 1950s. To this day, the group’s LET-LOK® brand leads the industry with the most progressive, high-quality leak-tight tube fitting systems offered.

 Examining LET-LOK®

LET-LOK® encompasses a wide variety of leading-edge, industrial-standard systems used to grip and seal tubing. These tube and pipe fittings are designed in several materials to accommodate different types of industrial applications, particularly where high pressure and severe conditions exist.

Indeed, industry experts have invested and incredible amount of time and effort in the research, development and manufacture of these superior products over the last five decades creating products that are able to meet the rapidly growing demand for tube fittings that can withstand use in high-pressure, high-performance, and vacuum environments. These include fluid, petrochemical, nuclear, electronic, power and other key industrial settings.

How LET-LOK Works

LET-LOK® connectors are custom-made for ease-of-use and assembly. They simply require inserting the tube into the complete assembly until the tube bottoms out against the fitting body. Then, the two ferrules are driven forward between the nut and fitting body using the mechanical force created by revolving the nut clockwise. The back ferrule is driven against the tapered rear of the front ferrule 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 11/4 and 3/4 turn (depending on their size) of the nut from the hand-tight position, assures consistent drive of the sealing members. This all ensures the ultimate seal against ultra-high vacuum and high-pressure conditions.

 Safety Guaranteed

HAM-LET honors safety as essential providing clients with abundant information and tips to help them choose the correct product for their application to achieve ultimate, safe and secure results. For example, in gas applications, its recommend that tubing with greater wall thickness is selected for enhanced efficiency and safety. It is also extremely important to choose products suitable to specific application requirements and to implement proper product installation, operation and maintenance. Furthermore, to secure personal safety when choosing a connector users should consider application details, material compatibility, and product ratings.

Each LET-LOK® fitting has undergone— and passed — a variety of strict tolerance tests, including those for vacuum, high-pressure, impulse, vibration, and temperature. Furthermore, the fittings, which are manufactured to demanding standards using advanced computerized automation, are robust enough to withstand every high-pressure condition. Their leak-tight assembly is also guaranteed by their mechanical advantage and geometry.

All LET-LOK® fittings are supported by HAM-LET‘s pledge of maximum quality-control standards and use of skilled craftsman!

Author: Sheila Jimenez

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