Hy-Lok USA, Inc. double ferrule compression tube fittings provide leak-free performance for the most demanding applications.
Two ferrule tube fittings are designed and manufactured to meet the rigorous specifications required of industrial applications. Hy-Lok tube fittings are commonly used throughout the oil and gas, pulp & paper, petrochemical/chemical processing, research laboratories, aerospace and defense, chemical processing, power generation, cryogenic and semiconductor, shipbuilding and heavy industrial industries.
Available in numerous configurations and sizes, our tube fittings are made up of four parts consisting of a body, front ferrule, back ferrule, and nut. Outstanding leak-tight connections are consistent as the two-ferrule design compensates for any tolerances in tube outer diameter, wall, thickness, and material hardness.
Hy-Lok tube fittings feature a low torque assembly and positive leak-free seal for easy assembly and reassembly.
During installation, the mechanical properties of the tubing are maintained because the back ferrule moves in a controlled manner that does not stress or reduce the inner diameter of the tubing. Since the front ferrule does not force the body to expand the nut can be backed off easily for disassembly and remakes.
Tube Fitting Materials
Constructed of standard materials including 316 stainless steel, brass, Monel, and other materials such as duplex stainless steel, titanium, and carbon steel are available upon request. Heat code traceability for 316 stainless steel and Alloy 400 assures the ratings and quality of each fitting and accounts for code requirements.
Tube Fitting Sizes
Fitting size range from 1/16″ through 2″ (2 mm through 38 mm O.D.tubing) with numerous choices in end connections and patterns. They are rated to the maximum working pressure of the recommended tubing. Hydraulic swaging tools (EZY-MAT) are provided for easy installation.
Hy-Lok's Quality
Hy-Lok tube fittings are manufactured to Hy-Lok’s stringent quality control program and standards which assure the highest quality available in the industry. We are a global industry-leading provider of fitting solutions and have obtained ASME Quality and ISO 9001:2015 Certifications. Common applications include pharmaceutical, life support, and oil & gas.
To fulfill the need for leak-free gas and fluid containment, our tube fittings are the ideal solution. For full details, view our catalog on Hy-Lok Tube Fittings.
Frequently Asked Questions
What are double ferrule compression tube fittings and how do they work?
Double ferrule compression tube fittings use two ferrules a front ferrule and a back ferrule to create a secure, leak-tight seal. The front ferrule forms the primary seal against the fitting body, while the back ferrule provides grip and support by anchoring the tubing. This dual mechanism ensures consistent performance even under high pressure, vibration, and temperature variations.
What industries commonly use Hy-Lok tube fittings?
Hy-Lok tube fittings are widely used across industries that require reliable, leak-free fluid and gas connections. These include oil and gas, petrochemical and chemical processing, power generation, aerospace and defense, semiconductor manufacturing, shipbuilding, and research laboratories. Their versatility makes them suitable for both standard and highly specialized applications.
What materials are available for Hy-Lok tube fittings?
Hy-Lok tube fittings are available in a variety of materials to meet different application requirements. Standard options include 316 stainless steel, brass, and Monel, while additional materials such as duplex stainless steel, titanium, and carbon steel are available upon request. Material selection depends on factors like corrosion resistance, temperature, pressure, and environmental conditions.
How do you ensure a leak-free installation with tube fittings?
Achieving a leak-free installation requires proper tube preparation and correct assembly procedures. Hy-Lok fittings are designed for low torque installation and controlled ferrule action, which helps maintain tubing integrity. Using the correct tubing specifications, following recommended tightening guidelines, and utilizing tools like hydraulic swaging systems can further ensure optimal sealing performance and long-term reliability.
HAVE A QUESTION?
If you have any questions about any of our products or services, don’t hesitate to give us a call. For any inquiries, fill out the form and one of our Hy-Lok representative will contact you soon.
