DIN 14R Expanding Union Liner

Internally Grooved Expanding Sleeve Construction

Unlike plain butt-weld DIN 14 or DIN 14S liners, the DIN 14R expanding liner features a longer cylindrical sleeve machined with internal circumferential grooves and a stepped outer union shoulder. Note that while the body parameter table prints thread end under Connection, the component itself has no threads and engages the union via its outer shoulder.

Stainless Steel Grades and Finish

The liner is offered in SS304 (AISI 304) and SS316L (AISI 316L) stainless steel with a specified surface finish of Ra < 0.8 μm. The series specification does not specify tube-expansion tooling, roll-expansion allowances, or adhesive procedures, so installation tooling parameters must be verified by the installer.

Dimensional Chart Coverage

While the header and body text tables state a nominal size range of DN15 to DN150, the embedded Expanding Liner (DIN-14R) dimensional drawing tabulates bore diameter A, outer sleeve diameter B, collar diameter C, and length D across the nominal size range from DN10 through DN150.

Application and Mating Selection

Designed for detachable DIN union joints in dairy, food, brewery, beverage, pharmaceutical, and cosmetic piping, this listing supplies the standalone DIN 14R liner only. Buyers should match sleeve bore A to the outside diameter of the tube being expanded and confirm compatibility with the mating DIN nut, male part, and seal.