氣(qi)(qi)(qi)(qi)動(dong)(dong)帶(dai)手動(dong)(dong)硬(ying)(ying)密(mi)封(feng)蝶(die)(die)(die)(die)閥(fa)(fa)、帶(dai)手動(dong)(dong)蝸輪氣(qi)(qi)(qi)(qi)動(dong)(dong)蝶(die)(die)(die)(die)閥(fa)(fa)襯四氟(fu)故密(mi)封(feng)性(xing)能良好蝶(die)(die)(die)(die)板(ban)厚(hou)度是介(jie)質流經閥(fa)(fa)體時的阻力操(cao)作(zuo)簡單具有結構(gou)(gou)緊湊輸(shu)出扭矩大氣(qi)(qi)(qi)(qi)動(dong)(dong)硬(ying)(ying)密(mi)封(feng)蝶(die)(die)(die)(die)閥(fa)(fa)、氣(qi)(qi)(qi)(qi)動(dong)(dong)三偏心(xin)蝶(die)(die)(die)(die)閥(fa)(fa)、高性(xing)能偏心(xin)蝶(die)(die)(die)(die)閥(fa)(fa)操(cao)作(zuo)簡單采用齒輪齒條式(shi)(shi)結構(gou)(gou)傳動(dong)(dong)因(yin)而啟閉(bi)力矩較小(xiao)有雙作(zuo)用式(shi)(shi)和單作(zuo)用式(shi)(shi)（彈(dan)簧復(fu)位）在其(qi)90°～0°關(guan)閉(bi)時D643W氣(qi)(qi)(qi)(qi)動(dong)(dong)硬(ying)(ying)密(mi)封(feng)蝶(die)(die)(die)(die)閥(fa)(fa)、氣(qi)(qi)(qi)(qi)動(dong)(dong)偏心(xin)蝶(die)(die)(die)(die)閥(fa)(fa)、氣(qi)(qi)(qi)(qi)動(dong)(dong)鑄鋼法(fa)蘭蝶(die)(die)(die)(die)閥(fa)(fa) ☆手動(dong)(dong)機構(gou)(gou)：HVSD手操(cao)機構(gou)(gou) 用隨閥(fa)(fa)桿轉動(dong)(dong)的圓(yuan)形蝶(die)(die)(die)(die)板(ban)做啟閉(bi)件(jian),以(yi)實現(xian)其(qi)動(dong)(dong)作(zuo)的氣(qi)(qi)(qi)(qi)動(dong)(dong)閥(fa)(fa)門(men)主要(yao)做截(jie)斷閥(fa)(fa)使用,亦可設計(ji)成具有調(diao)節或切斷兼調(diao)節的功能