A weir-type diaphragm valve is a specific design of diaphragm valve that features a raised lip or saddle in the valve body. The diaphragm comes into contact with this weir to form a seal and control fluid flow.
Main parts and materials
| Name/Material | CI | WCB | CF8 | CF3 | CF8M | CF3M |
| Body | CI | WCB | CF8 | CF3 | CF8M | CF3M |
| Diaphragm | EPDM/NR/IIR | EPDM/NR/IIR | EPDM/NR/IIR | EPDM/NR/IIR | EPDM/NR/IIR | EPDM/NR/IIR |
| Lined | EPDM/NR/IIR | |||||
| Seat | EPDM/NR/IIR | |||||
| Bolt/Nut | B7/2H | B7/2H | B8/8 | B8/8 | B8M/8M | B8M/8M |
Technical Specification
| Design&Manufacture Standard | GB12239 | GB12239 | ||
| FTF Dimension Standard | BS5156 | BS5156 | ||
| Flange standard | BS4504 | ASME B16.5 | ||
| Inspection & Test Standard | HG/T13927, JB/T9092 | API 598 | ||
| Normal Diameter | DN25~DN300 | 1”~12” | ||
| Normal Pressure | 1.0MPa | 1.6MPa | 150LB | |
| Test pressure | Shell Test | 1.5MPa | 1.5MPa | 1.5MPa |
| High Pressure Test | 1.1MPa | 1.1MPa | 1.1MPa | |
| Low Pressure Test | 0.6MPa | 0.6MPa | 0.6MPa | |
| Temperature Range | EPDM:-29℃~110℃, NR:-29℃~80℃, IIR:-29℃~110℃ | |||
| Applicable Medium | General corrosive medium and abrasive material | |||
The main connection size
| DN (mm | PNS (Inch) | Normal pressure (Mpa) | Working pressure (Mpa) | L | D | D1 | Z-Φd | f | H | Do |
| 20 | 3/4 | 1.0 | 1.0 | 117 | 105 | 75 | 4-14 | 2 | ||
| 25 | 1 | 127 | 115 | 85 | 4-14 | 2 | 146 | 120 | ||
| 32 | 1-1/4 | 148 | 140 | 100 | 4-18 | 2 | 152 | 120 | ||
| 40 | 1-1/2 | 159 | 150 | 110 | 4-18 | 2 | 152 | 120 | ||
| 50 | 2 | 190 | 165 | 125 | 4-18 | 2 | 163 | 120 | ||
| 65 | 2-1/2 | 216 | 185 | 145 | 4-18 | 2 | 205 | 230 | ||
| 80 | 3 | 254 | 200 | 160 | 818 | 2 | 220 | 230 | ||
| 100 | 4 | 305 | 220 | 180 | 8-18 | 2 | 262 | 280 | ||
| 125 | 5 | 0.6 | 356 | 250 | 210 | 8-18 | 3 | 290 | 280 | |
| 150 | 6 | 406 | 285 | 240 | 8-22 | 3 | 368 | 363 | ||
| 200 | 8 | 521 | 340 | 295 | 8-22 | 3 | 410 | 363 | ||
| 250 | 10 | 0.4 | 635 | 395 | 350 | 12-22 | 3 | 559 | 483 | |
| 300 | 12 | 749 | 445 | 400 | 12-22 | 3 | 625 | 576 |
A weir-type diaphragm valve is a specific design of diaphragm valve that features a raised lip or saddle in the valve body. The diaphragm comes into contact with this weir to form a seal and control fluid flow. Main parts and materials Name/Material CI WCB CF8 CF3 CF8M CF3M Body CI WCB CF8 CF3 CF8M CF3M Diaphragm […]
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