軟密封鑄鐵蝶閥是用圓形蝶板作啟閉件并隨閥桿轉動來開啟、關閉和調節流體通道的一種閥門。蝶閥不僅結構簡單、體積小、重量輕、材料耗用省，安裝尺寸小，而且驅動力矩小，操作簡便、迅速，并且還同時具有良好的流量調節功能和關閉密封特性，在大中口徑、中低壓力的使用領域，蝶閥是主導的閥門形式。隨著防腐合成橡膠和聚四氟乙烯的應用，蝶閥的性能得以提高，并滿足于不同的工況條件。近十幾年來，金屬密封蝶閥發展迅速，隨著耐高溫、耐低溫、耐強腐蝕、耐強沖蝕、高強度合金材料在蝶閥中的應用，使金屬密封蝶閥在高溫、低溫、強沖蝕等工況條件下得到廣泛的應用，并部分取代了截止閥、閘閥和球閥。

軟密封鑄鐵蝶閥結構特點：蝶閥具有結構簡單、體積小、重量輕、材料耗用省，安裝尺寸小，開關迅速、90°往復回轉，驅動力矩小等特點，用于截斷、接通、調節管路中的介質，具有良好的流體控制特性和關閉密封性能。 公稱壓力或壓力級：PN1.0-4.0MPa、ANSI CLASS 150-300LB、JIS10-20K 公稱通徑或口徑：DN40～2000 連接方式：法蘭連接、對夾連接、對焊連接及凸耳對夾連接適用溫度：-196℃～700℃ 驅動方式：手動、蝸輪傳動、氣動、電動、液動、氣液聯動、電液聯動閥體材料：HT200、WCB、ZG1Cr18Ni9Ti、ZG1Cr18Ni12Mo2Ti、CF8(304)、CF3(304L)、CF8M(316)、CF3M(316L)。

型號：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