本蝶阀阀座与阀板是由全PTFE制作而成，既具有普通蝶阀的机械强度，又能发挥PTFE的耐 强化学介质特性。采用双段轴，上下分段的技术。不适用于有颗粒和温度偏高的工艺介质中。 The seat and valve plate of butterfly valve are made of PTFE. They have the mechanical strength of common butterfly valve, and can play the PTFE properties of resistance to strong chemical mediator. Adopt double period of shaft, and up and down segmentation technology. Do not apply to the technical medium with particles and high temperature.