D941H，D943H，D971H，D971X，D941X，电动对夹、法兰蝶阀
蝶阀启闭件是一个圆盘形的蝶板，在阀体内绕其自身的轴线旋转，从而达到启闭或调节的阀门叫蝶阀。蝶阀全开到全关通常是小于900，蝶阀和蝶杆本身没有自锁有力，为了蝶板的定位，要在阀杆上加装蜗轮减速器。采用蜗轮减速器，不仅可以使蝶板具有自锁能力，使蝶板停止在任意位置上，还能改善阀门的操作性能。工业专用蝶阀的特点能耐高温，适用压力范围也较高，阀门公称通径大，阀体采用碳钢制造，阀板的密封圈采用金属环代替橡胶环。大型高温蝶阀采用钢板焊接制造，主要用于高温介质的烟风道和煤气管道。
对夹蝶阀、法兰蝶阀、软密封蝶阀、硬密封蝶阀个型号
D41X-16C DN40/D41X-16C DN50/D41X-16C DN65/D941X-16C DN80/D41X-16C DN100/D41X-16C DN125/D41X-16C DN150/D41X-16C DN200/D41X-16C DN250/D41X-16C DN300/D41X-16C DN350/D41X-16C DN400/D41X-16C DN450/D71X-10C DN40/D71X-10C DN50/D71X-10C DN65/D71X-10C DN80/D71X-10C DN100/D71X-10C DN125/D71X-10C DN150/D71X-10C DN200/D71X-10C DN250/D71X-10C DN300/D71X-10C DN350/D71X-10C DN400/D71X-16C DN40/D71X-16C DN50/D71X-16C DN65/D71X-16C DN80/D71X-16C DN100/D71X-16C DN125/D71X-16C DN150/D71X-16C DN200/D71X-16C DN250/D71X-16C DN300/D71X-16C DN350/D71X-16C DN400/ D71X-16C DN450/D41H-10CP DN40/D41H-10CP DN50/D41H-10CP DN65/D41H-10CP DN80/D41H-10CP DN100/D41H-10CP DN125/D41H-10CP DN150/D41H-10CP DN200/D41H-10CP DN250/ D41H-10CP DN300/D41H-10CP DN350/D41H-10CP DN400/D41H-16CP DN40/D41H-16CP DN50/D41H-16CP DN65/D41H-16CP DN80/D41H-16CP DN100/D41H-16CP DN125/D41H-16CP DN150/D41H-16CP DN200/D41H-16CP DN250/ D41H-16CP DN300/D41H-16CP DN350/D41H-16CP DN400/D41H-25CP DN40/D41H-25CP DN50/D41H-25CP DN65/D41H-25CP DN80/D41H-25CP DN100/D41H-25CP DN125/D41H-25CP DN150/D41H-25CP DN200/D41H-25CP DN250/ D41H-25CP DN300/D41H-25CP DN350/D41H-25CP DN400/D71H-10CP DN40/D71H-10CP DN50/D71H-10CP DN65/D71H-10CP DN80/D71H-10CP DN100/D71H-10CP DN125/D71H-10CP DN150/D71H-10CP DN200/D71H-10CP DN250/ D71H-10CP DN300/D71H-10CP DN350/D71H-10CP DN400/D71H-16CP DN40/D71H-16CP DN50/D71H-16CP DN65/D71H-16CP DN80/D71H-16CP DN100/D71H-16CP DN125/ D71H-16CP DN150/D71H-16CP DN200/D71H-16CP DN250/D71H-16CP DN300/ D71H-16CP DN350/D71H-16CP DN400/D71H-25CP DN40/D71H-25CP DN50/D71H-25CP DN65/D71H-25CP DN80/D71H-25CP DN100/D71H-25CP DN125/D71H-25CP DN150/ D71H-25CP DN200/D71H-25CP DN250/D71H-25CP DN300/D71H-25CP DN350/D71H-25CP DN400