軟密封砌蝶閥的閥咬用的是PTFE的擁，主要適用于氣聞送和對閥壽命要求很高的工 藝介質中，正常使用壽命可達百萬次。閥座外面是活動的嵌件，法蘭夾的越緊、壓力越大密封性 能越佳。
The valve seat of soft seal eccentric butterfly valve is adopted with FTFE. Mainly suitable for gas transmission and technical medium of high life demanding of valve. Normal service life is up to one million times. Outside the valve seat is active inserts. The tighter the flange is clamped, the greater the pressure is, and better the sealing performance is.