供应硬密封蝶阀

：小型轻便，容易拆装及维修，并可以在任意位置安装:                                       2：结构简单，紧凑，90度回转开启迅速。                                                       3：操作扭矩小，省力轻巧。                                                                        4：流量特性趋于直线，调节性能好。                                                            5：启闭试验次数多达数万次，寿命长。                                                          6：达到完全密封，气体试验泄漏为零。                                                           7：更换零件材质，配对，可使用多种介质