Model preparation of conventional electric butterfly valve: Unit 1: Model preparation method of electric butterfly valve, butterfly valve category code: butterfly valve code "D" Unit 2: Model preparation method of electric butterfly valve, butterfly valve transmission mode code: electric code "9" Unit 3: Model preparation method of electric butterfly valve, butterfly valve connection mode code: clamp type code "7", flange type code "4" Four units with the code of "6": the model preparation method of electric butterfly valve; the code of butterfly valve structure: the code of middle line type "1", the code of double eccentricity "2", the code of triple eccentricity "3"; five units: the model preparation method of electric butterfly valve; the code of butterfly valve sealing surface material: combination
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