Stainless Steel Compression Tube Fittings

Hy-Lok fittings are engineered specifically for high-pressure applications. They are manufactured from globally sourced, high-performance alloys and feature a two-ferrule design that provides a robust grip on the tube, creating a strong, vibration-resistant, and leak-proof seal that can withstand the rigors of challenging industrial conditions.

Industries with little margin for error benefit most, including oil and gas (upstream, midstream, downstream), petrochemical plants, power generation facilities, and industrial manufacturing. Any sector that relies on precise, reliable fluid control systems for instrumentation, hydraulic, or process lines will find these fittings essential for safe and efficient operations.

A compression fitting creates a seal by using ferrules (or rings) that are compressed onto the tubing as a nut is tightened. This compression deforms the ferrules, causing them to bite into the tubing and form a tight grip. This mechanical connection creates a secure, leak-proof seal without the need for welding, soldering, or flaring.

Hy-Lok fittings are manufactured from globally sourced, high-performance alloys. Stainless steel is the primary material for this category, chosen for its excellent durability, superior corrosion resistance, and ability to perform consistently in a wide range of challenging high-pressure and high-temperature industrial environments.

While it is sometimes possible, reusing compression fittings is generally not recommended for critical applications. The ferrules are designed to be permanently swaged onto the tubing upon initial installation to create the seal. Disassembling and reassembling can compromise the integrity of this seal, increasing the risk of leaks, especially in high-pressure systems.

The two-ferrule design provides a significant advantage in performance and reliability. The front ferrule creates the primary seal against the fitting body and on the tubing, while the back ferrule provides a strong mechanical grip on the tube. This separation of functions ensures excellent vibration resistance and a more robust, consistent, and leak-tight seal.