Gas 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
Gas check valves
H44N type swing check valve disc achieves rotating moving by the using of flow pressure difference and its own weight, and the flow resistance coefficient is small. It is applied to the vertical pipes of most tank areas, prevents and globe backflow automatically, to ensure the upstream device
Main design parameter
design and manufacture：GB/T12236-89
flange connection：JB/T79-94、GB9113-2000
face to face dimension：GB12221-89
nominal diameter：DN25~DN200mm
nominal pressure：PN2.5、4.0MP
Dimensions & constructral diagram
Gas check valve constructral diagram
Main performance and parameters
| nominal pressure | test pressure | applicable medium | suitable temperature | |
| shell | sealing | |||
| 2.5 | 3.75 | 2.75 | liquid petroleum gas | -40~+80℃ |
| 4.0 | 6.0 | 4.4 | ||
The materials of main parts
| part name | body,bonnet | sealing surface and disc |
| materials | Carbon steel | SS and nylon 1010 |
Main dimensions and weight
| nominal diameter DN（mm） | H41N-25 type main dimensiosn（mm） | weight （kg） | ||||||||
| L | D | D1 | D2 | b | f | Z-фd | H | D3 | ||
| 25 | 160 | 115 | 85 | 65 | 16 | 2 | 4-14 | 120 | 92 | 10 |
| 32 | 190 | 135 | 100 | 78 | 18 | 3 | 4-18 | 135 | 120 | 12 |
| 40 | 200 | 145 | 110 | 85 | 18 | 3 | 4-18 | 145 | 135 | 15 |
| 50 | 230 | 160 | 125 | 100 | 20 | 3 | 4-18 | 155 | 150 | 20 |
| 80 | 310 | 195 | 160 | 135 | 22 | 3 | 8-18 | 185 | 200 | 36 |
| 100 | 350 | 230 | 190 | 160 | 24 | 3 | 8-23 | 210 | 270 | 55 |
| 125 | 400 | 270 | 220 | 188 | 28 | 3 | 8-25 | 245 | 310 | 70 |
| 150 | 480 | 300 | 250 | 218 | 30 | 3 | 8-25 | 276 | 375 | 105 |
| 200 | 600 | 360 | 320 | 280 | 32 | 3 | 12-25 | 330 | - | 170 |
