Corrosion-resistant polytetrafluoroethylene (PTFE) oil seal products are widely used in machinery, screw air compressors, vacuum pumps, engines, gearboxes, flour mixers, beverage slicers, cooking machines, robots, pharmaceutical grinding machines, centrifuges, blowers, etc. The application environment includes strong acid resistance, strong alkali or strong oxidant, toluene, xylene, etc. It is suitable for food-free medical environment processing environment with no oil and self-lubricating environment and high cleanliness.
What are the advantages of materials? Polytetrafluoroethylene (PTFE), also known as Teflon/Teflon or Plastic King, is a copolymer of tetrafluoroethylene monomer, which has many advantages; chemical stability, almost all chemical resistance, strong acid, strong alkali Or strong oxidizing agents and organic solvents do not work for it. Thermal stability, cracking temperature above 400℃，therefore, it can work in the range of -200℃+350℃. Reduced wear, PTFE material friction coefficient is extremely low, only 0.02, is 1/40 of rubber. Self-lubricating, the surface of the PTFE material has outstanding self-lubricating properties, and almost all viscous substances cannot adhere to its surface.
Dongguan PTFE U-type oil seal manufacturers are relatively efficient, filled and modified, but pure PTFE is not wear-resistant, if it is practical, it must be filled with modification treatment. We use two methods, one is inorganic filler modification, and glass fiber, carbon fiber, graphite, molybdenum disulfide, etc. are added to PTFE. The other is organic material filling modification, and polyphenyl ester, polyphenylene sulfide and the like are added to the PTFE. Through modification, the wear resistance of PTFE is improved by 2000 times, and the rigidity and thermal conductivity are increased, so that the oil seal reaches a high life requirement.
What is the sealing principle? The PTFE oil seal lip is pulled into a trumpet shape during processing. Due to the memory shrinkage ability of the PTFE after drawing, the friction heat generated during the work will cause the lip to shrink continuously, so it will be tightly held without the help of a spring. On the shaft, it is not allowed to have a gap with the shaft surface, and it can compensate for the wear.
What are the product advantages? The rubber oil seal adopts a spring-pressed tip lip, and the contact surface width of the shaft is only 0.3-0.5mm. The PTFE oil seal adopts a spring-free wide lip power structure, and the shaft contact surface width is 5-7mm, so that an adequate amount can be maintained. Oil film, and is not sensitive to the eccentricity of the shaft, can still work normally under the condition of radial runout of 0.4mm. The inner wall of the PTFE oil seal is engraved with a thread groove opposite to that of the shaft. When the shaft rotates, an inward thrust is generated to prevent fluid outflow. It is especially suitable for working in oil-free or low-oil state. Even if it is reactivated after long-term shutdown, it can immediately have low friction characteristics. The rubber oil seal is only suitable for oil working.
Regarding product applications. Air compressors, engines, heat transfer oil pumps, vacuum pumps, chemical pumps and other pumps, reducers, bearings, mixers, blowers, machine tools, gearboxes, crankshafts, hydraulic motors, chemical processing equipment and various professional equipment, especially suitable for Traditional rubber seals are not suitable for applications. Under normal circumstances, the service life of PTFE oil seal is 20 times that of ordinary oil seal. We are committed to continuously improving our inventory and developing new products. Thereby solving the problem of long cycle and high price of imported products.
