CPI™ / A-LOK® Tube Fittings

Parker CPI™ and A-LOK® Instrumentation Tube Fittings are designed as leak-free connections for process, power and instrumentation applications. These single and two ferrule fittings are manufactured to the highest quality standards and are available in a broad range of sizes, materials and configurations.

Parker CPI™ and A-LOK® Instrumentation Tube Fittings are supplied complete and ready to use. The ferrule(s) swage onto the tube as it moves down the body seat creating a pressure/vacuum-tight seal on both tube and body by the interface pressure and surface finish of mating components. The Parker Suparcase® ferrule (back-ferrule only on A-LOK®) creates a strong mechanical hold on the tube.

Parker CPI™ / A-LOK® tube fittings can be used with a wide variety of tubing materials and a broad range of tube wall thicknesses. CPI™ / A-LOK® seals equally well on both thin wall and heavy wall tubing. Tubing and fitting materials should be selected to be compatible with the fluid media. Due to thermal expansion characteristics and chemical stability, the tubing should be of the same material as the fitting. (The exception is brass fittings and copper tubing).

CPI™ Fittings
CPI™ fittings feature a three piece, single ferrule design to work on all instrument grade tubing. Fittings are coated in Molybdenum Disulfide to prevent galling and provide lubrication. The ferrule is treated with Suparcase® technology to ensure sealing and provide excellent anti-vibration performance. CPI™ fittings’ superior body seat surface finish seals in gases and liquids. These fittings are excellent in high thermo cycling applications.

A-LOK® Fittings
A-LOK® Fittings are an industry standard for all insturment grade tubing. These double ferrule fittings have silver coated threads reduce galling. Back ferrules are treated with Suparcase® technology to provide a strong mechnanical grip on the tube.