叫截門,是使用廣泛的一種閥門,它之所以廣受歡迎,是由于開閉過程中密封面之間摩擦力小,比較耐用,開啟高度不大,制造容易,維修方便,不僅適用于中低壓,而且適用于高壓,離心泵截止閥的閉合原理是,依靠閥杠壓力,使閥瓣密封面與閥座密封面緊密貼合,阻止介質流通,單級雙吸離心泵截止閥只許介質單向流動,安裝時有方向性,截止閥的結構長度大于閘閥,同時流體阻力大,長期運行時,密封可靠性不強,單級雙吸離心泵截止閥分為三類:直通式截止閥截止閥、直角式截止閥及直流式斜截止閥,明顯的優點是:在開啟和關閉過程中,由于閥瓣于閥體密封面間的摩擦力比閘閥小,因而耐磨,開啟高度一般僅為閥座通道直徑的1/4,因此比閘閥小的多。因而制造工藝性比較好便于維修截止閥公稱壓力或壓力級:PN1.0-16.0MPa、ANSICLASS150-JIS10-20K公稱通徑或口徑:DN10~NPS1/2~36截止閥連接方式:法蘭、對焊、螺紋等適用溫度:-196℃~700℃截止閥驅動方式:手動、傘齒輪傳動、氣動、電動、液動、氣液聯動、電液聯動閥體材料:WCB、ZG1Cr18Ni9Ti、ZG1Cr18Ni12Mo2Ti、CF8(304)、CF3(304L)、CF8M(316)、CF3M(316L)、Ti截止閥選用不同的材質可分別適用于水、蒸汽、油品、硝酸、醋酸、氧化性介質、尿素等多種介質。密封面點蝕,甚至穿透,由于碳化鎢環與不銹鋼座焊接,使用中不銹鋼座易產生晶間腐蝕,焊接金屬波紋管、彈簧等
| 型號 參數 | 流量 Capacity | 揚程 Heed | 轉速 Speed | 軸功率 Shaft power | 配帶電動機 Motor | 效率 Eff. | 必須汽蝕余量 | 泵口徑 | 泵重 | |||
| Q | H | n | Pa | 功率 | 型號 Type | η | (NPSH)r | 進口 | 出口 | |||
| m3/h | L/s | m | r/min | kw | kw | % | m | mm | mm | kg | ||
| D.DF.DY.MD12-50×2 | 7.5 | 2.08 | 108 | 2950 | 5.80 | 11 | Y160M1-2 | 37.8 | 2 | 50 | 50 | 160 |
| 12.5 | 3.47 | 100 | 7.60 | 45 | 2 | |||||||
| 15 | 4.17 | 93 | 8.30 | 45.9 | 2.5 | |||||||
| D.DF.DY.MD12-50×3 | 7.5 | 2.08 | 162 | 2950 | 8.80 | 18.5 | Y160L-2 | 37.8 | 2 | 50 | 50 | 189 |
| 12.5 | 3.47 | 150 | 11.30 | 45 | 2 | |||||||
| 15 | 4.17 | 139.5 | 12.40 | 45.9 | 2.5 | |||||||
| D.DF.DY.MD12-50×4 | 7.5 | 2.08 | 216 | 2950 | 11.70 | 22 | Y180M-2 | 37.8 | 2 | 50 | 50 | 217 |
| 12.5 | 3.47 | 200 | 15.10 | 45 | 2 | |||||||
| 15 | 4.17 | 186 | 16.60 | 45.9 | 2.5 | |||||||
| D.DF.DY.MD12-50×5 | 7.5 | 2.08 | 270 | 2950 | 14.60 | 30 | Y200L1-2 | 37.8 | 2 | 50 | 50 | 245 |
| 12.5 | 3.47 | 250 | 18.90 | 45 | 2 | |||||||
| 15 | 4.17 | 232.5 | 20.70 | 45.9 | 2.5 | |||||||
| D.DF.DY.MD12-50×6 | 7.5 | 2.08 | 324 | 2950 | 17.60 | 30 | Y200L1-2 | 37.8 | 2 | 50 | 50 | 273 |
| 12.5 | 3.47 | 300 | 22.70 | 45 | 2 | |||||||
| 15 | 4.17 | 279 | 24.80 | 45.9 | 2.5 | |||||||
| D.DF.DY.MD12-50×7 | 7.5 | 2.08 | 378 | 2950 | 20.40 | 37 | Y200L2-2 | 37.8 | 2 | 50 | 50 | 301 |
| 12.5 | 3.47 | 350 | 26.50 | 45 | 2 | |||||||
| 15 | 4.17 | 325.5 | 29.00 | 45.9 | 2.5 | |||||||
| D.DF.DY.MD12-50×8 | 7.5 | 2.08 | 432 | 2950 | 23.30 | 45 | Y225M-2 | 37.8 | 2 | 50 | 50 | 329 |
| 12.5 | 3.47 | 400 | 30.30 | 45 | 2 | |||||||
| 15 | 4.17 | 372 | 33.10 | 45.9 | 2.5 | |||||||
| D.DF.DY.MD12-50×9 | 7.5 | 2.08 | 486 | 2950 | 26.30 | 45 | Y250M-2 | 37.8 | 2 | 50 | 50 | 357 |
| 12.5 | 3.47 | 450 | 34.00 | 45 | 2 | |||||||
| 15 | 4.17 | 418.5 | 37.30 | 45.9 | 2.5 | |||||||
| D.DF.DY.MD12-50×10 | 7.5 | 2.08 | 540 | 2950 | 29.20 | 55 | Y250M-2 | 37.8 | 2 | 50 | 50 | 385 |
| 12.5 | 3.47 | 500 | 37.80 | 45 | 2 | |||||||
| 15 | 4.17 | 465 | 41.40 | 45.9 | 2.5 | |||||||
| D.DF.DY.MD12-50×11 | 7.5 | 2.08 | 594 | 2950 | 32.10 | 55 | Y250M-2 | 37.8 | 2 | 50 | 50 | 413 |
| 12.5 | 3.47 | 550 | 41.60 | 45 | 2 | |||||||
| 15 | 4.17 | 511.5 | 45.50 | 45.9 | 2.5 | |||||||
| D.DF.DY.MD12-50×12 | 7.5 | 2.08 | 648 | 2950 | 35.00 | 75 | Y280S-2 | 37.8 | 2 | 50 | 50 | 441 |
| 12.5 | 3.47 | 600 | 45.40 | 45 | 2 | |||||||
| 15 | 4.17 | 558 | 50.00 | 45.9 | 2.5 | |||||||