Flange Lift Ammonia Check Valve
manufacturer: Shanghai MeiYan Yi Pump & Valve Co., Ltd.
E-mail: sales@1bengfa.com
Tel: +86 (21) 5640 2009
Mob: +86 138 1691 3072（WeChat Same Account）
product drawing
H41N flange lift ammonia check valves
Product features
This valve disc uses fluid pressure difference and its own weight to achieve lift, is applied to most horizontal pipes, auto-stops media reflux, protects the upstream equipment.
Main design parameters
design, manufacture：GB/T12237-89
flange connection：JB/T79-94、GB9113-2000
face to face dimension：GB12221-89
nominal diameter：DN15~DN200mm
nominal pressure：PN1.6、2.5、4.0MP
Dimensions & constructral diagram
H41N flange lift ammonia check valve constructral diagram
Main performance parameters
| nominal pressure | shell test | sealing test | applicable medium | suitable temperature |
| 2.5 | 3.75 | 2.75 | ammonia, natural gas,etc | -40~+80℃ |
| 4.0 | 6.0 | 4.4 |
The materials of main parts
| body, bonnet | disc | sealing surface |
| WCB | carbon steel | stainless steel and nylon |
Main external dimensions
| nominal diameter DN(mm) | H41N-25 type main dimensions（mm） | weight | ||||||||
| L | D | D1 | D2 | b | f | Z-фd | H | D3 | (kg) | |
| 15 | 130 | 95 | 65 | 45 | 16 | 2 | 4-14 | 100 | - | 5 |
| 20 | 150 | 105 | 75 | 55 | 16 | 2 | 4-14 | 105 | - | 7 |
| 25 | 160 | 115 | 85 | 65 | 16 | 2 | 4-14 | 115 | 100 | 9 |
| 32 | 190 | 135 | 100 | 78 | 18 | 2 | 4-18 | 120 | 120 | 10 |
| 40 | 200 | 145 | 110 | 85 | 18 | 3 | 4-18 | 140 | 135 | 15 |
| 50 | 230 | 160 | 125 | 100 | 20 | 3 | 4-18 | 150 | 150 | 20 |
| 65 | 290 | 180 | 145 | 120 | 22 | 3 | 8-18 | 160 | 175 | 25 |
| 80 | 310 | 195 | 160 | 135 | 22 | 3 | 8-18 | 175 | 200 | 32 |
| 100 | 350 | 230 | 190 | 160 | 24 | 3 | 8-23 | 200 | 230 | 57 |
| 125 | 400 | 270 | 220 | 188 | 28 | 3 | 8-25 | 230 | 273 | - |
| 150 | 480 | 300 | 250 | 218 | 30 | 3 | 8-25 | 265 | 330 | - |
| 200 | 600 | 360 | 310 | 278 | 34 | 3 | 12-25 | 300 | 365 | |
