软密封砌蝶阀的阀咬用的是PTFE的拥，主要适用于气聞送和对阀寿命要求很高的工 艺介质中，正常使用寿命可达百万次。阀座外面是活动的嵌件，法兰夹的越紧、压力越大密封性 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.