Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.
.webp)
.jpg)
Swaging a tube fitting happens when you tighten a fitting nut onto the tubing. This process creates a seal that prevents leaks. This is a procedure that incorporates the mechanical deformation of metal to secure a connection.
To begin an installation, a tube is first inserted through the nut and both ferrules, with the front ferrule positioned against the fitting body and the back ferrule sitting behind it. The nut holds all the components in order and in place.
A wrench is then used to tighten the nut, which drives the back ferrule forward. The back ferrule has an angled pitch that drives the front ferrule forward. This driving process forces the front ferrule inward as both ferrules begin to deform under mechanical pressure.
As the fitting nut reaches the point of maximum seal and compression, several critical actions occur simultaneously: the front ferrule bites into the tube to create a primary seal, and the back ferrule provides both tube grip and anti-vibration support. Both ferrules permanently deform to match the tube's surface contours, resulting in a gas-tight seal capable of handling high-pressure conditions. This mechanical action creates multiple metal-to-metal sealing points, resulting in a secure connection that can withstand pressure, vibration, and thermal cycling.
The success of the swaging process depends on several critical factors. First, the tube must be properly prepared with clean, deburred ends. The tightening technique must be precise, typically requiring 1¼ turns after achieving finger-tight status for most sizes.
Additionally, proper tube insertion depth is crucial for achieving an effective seal. This careful attention to detail in both component selection and assembly technique ensures the long-term reliability of the connection.
Superlok i-fittings, which are a game-changing tube fitting brand, incorporate a patented indicator ring that acts as a gap gauge. The two-piece ring is installed on each ¼”-1” fitting between the fitting body and the nut. As the fitting nut is tightened to complete the process, the indicator rings pop away from the assembly, indicating the process is complete and the swaging action has achieved the point of perfect compression. This leak-free technology assures installation accuracy every time.
Contact us for more information!
Check out our blog for the latest updates and how-to's from Mako Products!
