Filled PTFE piston rings are mainly used in oil-free reciprocating piston compressor cylinders in the food, medical, laboratory, military, plastic processing industries. In these industries, compressor cylinders are generally in the range of 30~700mm. On the other hand, considering that the mechanical strength and hardness of the filled polytetrafluoroethylene material is much lower than that of the metal material, the use in an oversized or undersized cylinder may cause eccentric wear or excessive wear and may not meet the service life requirement. In addition, if the cylinder pressure difference between the inlet and outlet is too large, the sealing performance of the PTFE piston ring will be greatly reduced. Therefore, a standard is required to define the applicable range of the filled polytetrafluoroethylene piston ring: the cylinder diameter is 40~600mm, and the inlet and exhaust pressure difference is not more than 15MPa.

The outer diameter of the filled Teflon piston ring is the same as the inner diameter of the compressor cylinder, but the tolerances are different. Both positive and negative tolerances are selected to meet the requirements of gas volume and air pressure. The difference in parameters such as radial wall thickness and ring height is greater. The formulation of the piston-filled PTFE piston ring standard can regulate the industrial market on the one hand, and put forward more clear requirements on the performance, processing precision, packaging and storage of the filled PTFE piston ring products, so that the processing Manufacturers are more standardized and standardized production, which is conducive to ensuring product quality and problem traceability. When problems are encountered, problems can be found in time to solve problems, improve customer service satisfaction, promote product quality and industrial management level, and adopt standards. Continue to explore the manufacturing model of the industry, integrate resources, and optimize and upgrade.