POPU Valve: DI Wafer Check Valve
The DI wafer check valve is an automatic valve, composed of valve body, valve disc, valve stem, torsion spring and rubber sealing ring.
The valve disc is opened under the action of fluid pressure, and the fluid flows from the end of the inlet end to the outlet end. When the pressure of the inlet section is lower than the outlet end, the valve disc is automatically closed under the action of fluid pressure difference and torsion spring, which plays a role in preventing liquid backflow.
| Name | Body | Spring | Disc | Stem | Seat |
| Material | DI | 304 | DI | 304 | PTFE |
| DN | NPS（INS） | L±1.5 | D | D1 | D2 |
| 50 | 2'' | 43 | 101 | 58 | 65 |
| 65 | 2 1/2'' | 46 | 118 | 75 | 80 |
| 80 | 3'' | 64 | 132 | 85 | 94 |
| 100 | 4'' | 64 | 157 | 105 | 117 |
| 125 | 5'' | 70 | 186 | 125 | 145 |
| 150 | 6'' | 76 | 213 | 165 | 170 |
| 200 | 8'' | 89 | 272 | 215 | 224 |
| 250 | 10'' | 114 | 328 | 260 | 265 |
| 300 | 12'' | 114 | 378 | 300 | 310 |
1. Valve body adopts QT450-10 material, sphericalization rate of 3 levels, strong mechanical properties, tensile strength 450Mpa, extension rate of more than 10%.
2. Sealing surface is line sealing, good sealing performance, can realize hydrostatic pressure 0 leakage.
3. Nickel-base alloy is the most suitable material for spring, good corrosion resistance and high temperature stability, stable and reliable torque, can provide material report.
4. The rubber is treated with special vulcanization process to avoid aging of the rubber after high temperature spraying and give full play to the rubber performance. The bonding strength of the rubber and the valve body is more than 1.732MPa, which effectively avoids the phenomenon of the valve seat falling off in the process of using.
5. The valve body adopts Akzo brand powder thermal spraying process, the spraying thickness reaches 250μm, the adhesion scribing method 0-1 level passes, the impact strength of 50Kg.cm positive impact passes.
6. Each valve factory in accordance with national standards to do shell, sealing double pressure test.
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