Resilient Seated Butterfly Valve
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PTFE Wafer Butterfly Valve
PTFE wafer butterfly valve uses a wafer-type connection and features a polytetrafluoroethylene (PTFE) seat with FDA food safety certification.
Applications
PTFE wafer butterfly valves can be used for various applications including:
- Wastewater transport
- High-temperature and high-pressure steam transport
- Food-grade media transport
- Seawater transport
- Conveyance of corrosive substances such as acids and bases
Basic Information
- Size Range
- DN50-DN600
- Temperature Range T
- 0-120℃
- Maximum Allowable Operating Pressure PN
- 1.0Mpa
- Pressure Rating
- 1.5Mpa (Shell)
1.0Mpa (Seal)
- Applicable Media
- Freshwater, seawater, air, weak acid-base, and so on.
Materials
| No. | Part | Material | No. | Part | Material |
| 1 | Valve Body | Cast iron, cast steel | 6 | Worm Gear | Cast Steel |
| 2 | Valve Disc | Stainless steel lined with PTFE and cast steel lined with PTFE | 7 | Bolts | Stainless Steel |
| 3 | Valve Seat | FTFE | 8 | O-Ring | NBR |
| 4 | Upper Stem | Stainless Steel | 9 | Lubricating Sleeve | Aluminum Bronze |
| 5 | Lower Stem | Stainless Steel | 10 | Gasket | Spring Steel |
Specifications
| Size | ØD | H1 | H2 | H3 | L1 | M*M | D1 | D2 | n-Ød2 | ||||
| ASME | EN(PN10) | EN(PN16) | JIS | AS | |||||||||
| DN50 | 121 | 125 | 125 | 120 | 114 | 75 | 140 | 11 | 43 | 11*11 | 72 | 50 | 4-Ø7 |
| DN65 | 140 | 145 | 145 | 140 | 127 | 82 | 150 | 11 | 46 | 11*11 | 72 | 50 | 4-Ø7 |
| DN80 | 152 | 160 | 160 | 150 | 146 | 90 | 160 | 11 | 46 | 11*11 | 72 | 50 | 4-Ø7 |
| DN100 | 191 | 180 | 180 | 175 | 178 | 118 | 178 | 14 | 52 | 14*14 | 92 | 70 | 4-Ø10 |
| DN125 | 216 | 210 | 210 | 210 | 210 | 131 | 190 | 17 | 56 | 17*17 | 92 | 70 | 4-Ø10 |
| DN150 | 241 | 240 | 240 | 240 | 235 | 145 | 200 | 17 | 56 | 17*17 | 92 | 70 | 4-Ø10 |
| DN200 | 299 | 295 | 295 | 290 | 292 | 173 | 240 | 22 | 60 | 22*22 | 125 | 102 | 4-Ø12 |
| DN250 | 362 | 350 | 355 | 365 | 356 | 208 | 273 | 22 | 68 | 22*22 | 125 | 102 | 4-Ø12 |
| DN300 | 432 | 400 | 410 | 400 | 406 | 244 | 310 | 27 | 78 | 27*27 | 150 | 125 | 4-Ø14 |
| DN350 | 476 | 460 | 470 | 445 | 470 | 284 | 346 | 27 | 78 | 27*27 | 150 | 125 | 4-Ø14 |
| DN400 | 540 | 515 | 525 | 510 | 521 | 320 | 375 | 40 | 102 | 36*36 | 175 | 140 | 4-Ø18 |
| DN450 | 578 | 565 | 585 | 565 | 584 | 340 | 406 | 40 | 114 | 36*36 | 175 | 140 | 4-Ø18 |
| DN500 | 635 | 620 | 650 | 620 | 641 | 365 | 438 | 50 | 127 | 46*46 | 210 | 165 | 4-Ø22 |
| DN600 | 749 | 725 | 770 | 730 | 756 | 446 | 495 | 50 | 154 | 46*46 | 210 | 165 | 4-Ø22 |
Certifications
| Item | Standard | Optional Standard |
| Design & Manufacture | GB12238-89 | ISO/DIN10631-91, AP1598 |
| Face to Face Dimension | GB12221-89 | ISO5752-88 |
| Flange Connection | GB9113.1-2000, GB/T9119-2010 | ANSI.B16.5, ISO7005, JIS2220:2004, DIN2532 |
| Valve Test | GB/T13927-92 | ISO/DIN 5208-87 |
| Valve Mark | GB12220-89 | ISO/DIN 5209-87 |
| Valve Supply Requirements | GB/T12252 | ／ |