Flat-faced seal replaces elastomeric O-rings
Parker Hannifin
The Parker Seal-Lok Xtreme line of flat-face seal fittings (photo) was recently awarded a patent for its newest addition — a stainless-steel, flat-face sealing ring that is designed for use with tube fittings in extreme- (high- and low-) temperature applications. The innovative metal seal features a unique trap-style seal with three retainer clips that extend into the existing fitting’s O-ring groove and prevent the seal from falling out during assembly or reassembly. It is said to provide an alternative to elastomeric O-rings in traditional O-ring face-seal fittings that are not able to meet high- or low-temperature or chemical compatibility requirements of certain applications. These metal seals can be used in applications from –328 to 1,200°F (–200 to 650°C), while elastomeric O-rings seals are limited to a temperature range of –65°F to 450°F (–54°C to 232°C). This seal is designed for liquefied natural gas (LNG) storage and fueling systems, combustion turbines, cryogenic applications, and other demanding CPI applications, according to the manufacturer. — Parker Hannifin Corp., Columbus, Ohio