气动衬氟蝶阀，属于对夹/法兰式衬氟蝶阀系列；它由气动执 行机构和衬氟蝶阀组成，阀体部分可与气动、电动执行机构选配 组合，组成各种不同类型的蝶阀品种规格。该产品按其衬里材质 分为全衬氟蝶阀和半衬氟蝶阀。全衬氟蝶阀由于衬氟蝶阀阀体内 腔均有抗腐蚀的氟塑料(PTFE/FEP/PFA) 制成衬里， 同时对蝶板 和阀杆里进行包衬氟塑料，并在阀基面内设有硅橡胶衬垫，用来调 节阀座基面预紧，以达到与蝶板密封性能。阀体采用分离式，阀轴 两端的密封由蝶板与阀座之间的旋转基面靠氟橡胶圈来控制，从 而使阀轴不与腔内介质接触，保证了密封无泄漏。

Pneumatic actuator control butterfly valve is YFM patent product， which belong to D671waferandD 641 flange type lined butterfly valve series， consist of pneumatic actuator and lined butterfly valve. These valves are divided into fully lined butterfly valve and half lined butterfly valve according to different lining ways.Fully lined butterfly refers to the PTFE/PFA/FEP seat and disc lined with PTFE/PFA/FEP. There is silicon pad to adjust pre-tighten for keeping the best sealing. valve body is split.The sealing of axis end is controlled by Viton which locate between disc and seat， so that the axis is out of touch medium to ensure the sealing without any leakage.