立式止回阀主要用于垂直管道系统中防止介质倒流。阀瓣沿着中心定位作升降运动，衬套采用耐磨性能好，摩擦系数小的特殊材料制作，动作灵活可靠 . 密封性能优良。该阀广泛应用于石油、化工、制药、电力行业等各种工况的管路上。
FEATURES
2"~24" (DN50~DN600)
W. P.: PN16 CLASS 150
W. T.:-20℃ ~200℃ (-4℉~392℉)
INVESTMENT CASTING
| ITEM | PARTS | MATERIAL | |
| 1 | BODY | ASTM A351-CF8M | ASTM A216-WCB |
| 2 | DISC | AISI 316 | AISI 304 |
| 3 | SPRING | ||
| 4 | SEAT | ||
| 5 | BUSHING | ||
| 6 | SEAL | VITON | BUNA-N |
DIMENSIONS
| DN | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | 500 | 600 |
| L | 133 | 140 | 154 | 187 | 216 | 248 | 321 | 399 | 362 | 400 | 448 | 500 | 523 | 600 |
| D | 152 | 178 | 191 | 229 | 254 | 279 | 343 | 406 | 483 | 535 | 595 | 635 | 700 | 813 |
NPS | 2" | 2-1/2" | 3" | 4" | 5" | 6" | 8" | 10" | 12" | 14" | 16" | 18" | 20" | 24" |
| L | 5.24 | 5.51 | 6.06 | 7.36 | 8.5 | 9.76 | 12.64 | 15.71 | 14.25 | 15.75 | 17.64 | 19.69 | 20.59 | 23.62 |
| D | 5.98 | 7.01 | 7.52 | 9.02 | 10 | 10.98 | 13.5 | 15.98 | 19.02 | 21.06 | 23.43 | 25 | 27.56 | 32.01 |
