Global Processing

PTFE fluoropolymer lined metal speeds up media flow

November 3, 2008

Smoothbore PTFE liner inserted in the inside diameter of metal hose assemblies provides easier cleaning and less flow resistance for faster media transport in high purity applications, according to the manufacturer. PTFE has the lowest coefficient of friction of any plastic available and has a moisture absorption rating of <0.01. These Fluoropolymer lined metal hose assemblies are constructed of stainless steel corrugated inner core available with or without stainless steel external braid. The braided reinforcement is installed over the metal hose and is then heliarc welded to the hose with a stainless braid ring. Non-reinforced assemblies can be used where working pressures are lower and only secondary containment is a requirement for the metal hose. The PTFE liner’s smooth inner surface acts as a barrier between the media and the stainless steel core, while the metal hose allows the liner to have a smaller bend radius without kinking and a sealed secondary containment area. The hose also supports the liner and helps keep it from collapsing in vacuum applications. The hose comes in sizes ranging from 1” I.D. up to 4” I.D. Flanges are available in stainless steel (304 or 316) or carbon steel.