| 
 一、H44F型衬氟止回阀概述: 
   止回阀是一种依靠介质本身的流动而自动启闭阀瓣用来阻止介质逆向流动的自动阀门,衬里止回阀基本类型有四种:H41型法兰连接直通升降式止回阀和H42型升降立式止回阀、H44立式止回阀、H76旋启式止回阀。 
二、衬氟升降止回阀主要外形和连接尺寸: 
| 
 公称通径  | 
 标准值  | 
 参考值  |  
| 
 DN(mm  | 
 NPSinch  | 
 L  | 
 D  | 
 D1  | 
 D2  | 
 f  | 
 b  | 
 Z-φd  | 
 B  | 
 H  | 
 WTkg  |  
| 
 PN1.0MPa  |  
| 
 15  | 
 1/2  | 
 130  | 
 95  | 
 65  | 
 45  | 
 2  | 
 14  | 
 4-φ14  | 
 105  | 
 55  | 
 5  |  
| 
 20  | 
 3/4  | 
 150  | 
 105  | 
 75  | 
 55  | 
 2  | 
 16  | 
 4-φ14  | 
 115  | 
 58  | 
 7  |  
| 
 25  | 
 1  | 
 160  | 
 115  | 
 85  | 
 65  | 
 2  | 
 16  | 
 4-φ14  | 
 128  | 
 60  | 
 9  |  
| 
 32  | 
 11/4  | 
 180  | 
 135  | 
 100  | 
 78  | 
 2  | 
 18  | 
 4-φ18  | 
 145  | 
 75  | 
 11  |  
| 
 40  | 
 11/2  | 
 200  | 
 145  | 
 110  | 
 85  | 
 3  | 
 18  | 
 4-φ18  | 
 160  | 
 82  | 
 13.5  |  
| 
 50  | 
 2  | 
 230  | 
 160  | 
 125  | 
 100  | 
 3  | 
 20  | 
 4-φ18  | 
 178  | 
 95  | 
 18  |  
| 
 65  | 
 21/2  | 
 290  | 
 180  | 
 145  | 
 120  | 
 3  | 
 20  | 
 4-φ18  | 
 205  | 
 105  | 
 22  |  
| 
 80  | 
 3  | 
 310  | 
 195  | 
 160  | 
 135  | 
 3  | 
 22  | 
 4-φ18  | 
 230  | 
 120  | 
 28  |  
| 
 100  | 
 4  | 
 350  | 
 215  | 
 180  | 
 155  | 
 3  | 
 22  | 
 8-φ18  | 
 255  | 
 135  | 
 34  |  
| 
 125  | 
 5  | 
 400  | 
 245  | 
 210  | 
 185  | 
 3  | 
 24  | 
 8-φ18  | 
 305  | 
 158  | 
 58  |  
| 
 150  | 
 6  | 
 480  | 
 280  | 
 240  | 
 210  | 
 3  | 
 24  | 
 8-φ23  | 
 345  | 
 180  | 
 72  |  
| 
 200  | 
 8  | 
 600  | 
 335  | 
 295  | 
 265  | 
 3  | 
 26  | 
 8-φ23  | 
 415  | 
 215  | 
 150  |  
| 
 250  | 
 10  | 
 622  | 
 390  | 
 350  | 
 320  | 
 3  | 
 28  | 
 12-φ23  | 
 490  | 
 240  | 
 165  |  
| 
 300  | 
 12  | 
 698  | 
 440  | 
 400  | 
 368  | 
 4  | 
 28  | 
 12-φ23  | 
 540  | 
 265  | 
 190  |  
| 
 350  | 
 14  | 
 787  | 
 500  | 
 460  | 
 428  | 
 4  | 
 30  | 
 16-φ23  | 
 585  | 
 300  | 
 225  |  
| 
 400  | 
 16  | 
 914  | 
 565  | 
 515  | 
 482  | 
 4  | 
 32  | 
 16-φ25  | 
 635  | 
 360  | 
 254  |  
| 
 450  | 
 18  | 
 978  | 
 615  | 
 565  | 
 532  | 
 4  | 
 32  | 
 20-φ25  | 
 680  | 
 385  | 
 285  |  
| 
 500  | 
 20  | 
 978  | 
 670  | 
 620  | 
 585  | 
 4  | 
 34  | 
 20-φ25  | 
 740  | 
 415  | 
 333  |     |