Pan Zhongxin plug seal is a fitted by the U-shaped groove polytetrafluoroethylene (or other polymeric materials) in the jacket of the resistance to corrosion of the metal energy storage spring, is arranged in the sealing groove, a compression spring, prompting the U-shaped jacket lips tightly sealed groove, thus forming a seal.

U type jacket is composed of PTFE, filled PTFE, or other high performance polymer materials precision turning made, according to the different materials can meet the 190 and - 340 DEG C temperature range, almost without any chemical reagent reacts.

According to different working conditions, we can choose different spring form, spring load can achieve dynamic application of the extremely demanding low friction and low temperature sealing requirements of high load. Spring to the U type to provide a permanent set of elastic, and make up for the material wear and offset and offset with the parts. System pressure will also lead to U type jacket seal, through the spring force and the system pressure, either under high pressure or low pressure, can be a good seal.