Valve seat ( ring) generally use the Teflon and other flexible materials, easy-to ensure the seal, and valve sealing force with medium pressure increases. 球阀阀座(密封圈)一般采用聚四氟乙烯等弹性材料制造,易于保证密封,而且球阀的密封力随着介质压力的增加而增大。
The Application of Two-Teflon Built-up Type Oil Seal on Motorcycle Engine 双主唇聚四氟乙烯组合式油封在摩托车发动机上的应用