Size Range: DN50-DN1600
Pressure Range: PN6-PN16
End Connection: Wafer
Material: Cast Iron, Ductile Iron, Stainless Steel
Seals: EPDM, PTFE, NBR
Valve Design: Electric Butterfly Valve with Soft Seal
Face to Face: ISO 5752, API 609
End Connection: ANSI B16.1, ISO 7005
Testing & Inspection: API 598, ISO 5208
Suitable Medium: Water, Oil, Gas, Light Chemicals
The electric wafer soft seal butterfly valve adopts a coaxial structure. Its main components include the valve body, butterfly plate, valve seat, stem, and transmission parts. The valve seat is of detachable construction. Depending on different media and operating environments, anti-corrosion, light-weight, and anti-aging materials can be selected. It is widely used in water supply and drainage, HVAC, petroleum, chemical, food, medicine, energy systems, and other pipelines as a regulating and shut-off valve.
The valve seat and valve body are integrated with materials like sulfide, offering good anti-blocking performance, easy maintenance, and eliminating the need for additional gaskets during installation. Materials can be selected according to the medium.
Simple structure, quick to open. Butterfly plate uses streamlined design, allowing bi-directional flow, low resistance, and excellent flow characteristics.
Long service life, fewer opening and closing cycles.
Double-sealing structure ensures zero leakage.
Flow characteristics follow a linear trend, making regulation more precise.
| Category | Standard |
|---|---|
| Manufacturing Standard | GB 12238–89 |
| Flange Standard | GB/T 17241.6, GB/T9113.1 |
| Structure of Length Standard | GB 12221–89 |
| Test Standard | GB/T 13927–92 |
| Model | Rated Pressure PN (MPa) | Shell Test Pressure PS (MPa) | Sealing Test Pressure (MPa) | Working Temperature (℃) | Applicable Medium |
|---|---|---|---|---|---|
| D671X-6 | 0.6 | 0.9 | 0.66 | ≤150℃ | Water, oil |
| D971X-10 | 1.0 | 1.5 | 1.1 | ≤150℃ | Water, oil |
| D671X-16 | 1.6 | 2.4 | 1.76 | ≤150℃ | Water, oil |
| Part Name | Material |
|---|---|
| Valve body, Butterfly plate | Gray Iron, Ductile Iron, Carbon Steel, Stainless Steel |
| Stem | Stainless Steel (2Cr13), 1Cr18Ni9Ti, Medium Carbon Steel |
| Seal Ring | Natural Rubber (NR), Nitrile Rubber (NBR), EPDM, PTFE, Viton |
| Packing | Flexible Graphite |
| DN (mm) | Main dimensions | 0.6 MPa | 1.0 MPa | 1.6 MPa | ||||
|---|---|---|---|---|---|---|---|---|
| L | H1 | H2 | E | F | D1 n–Φd | D1 n–Φd | D1 n–Φd | |
| 50 | 43 | 80 | 160 | 137 | 109 | 110 4–Φ14 | 120 4–Φ19 | 125 4–Φ19 |
| 65 | 46 | 88 | 175 | 204 | 109 | 130 4–Φ14 | 136 4–Φ19 | 145 4–Φ19 |
| 80 | 46 | 96 | 180 | 204 | 109 | 150 4–Φ19 | 160 4–Φ19 | 160 4–Φ19 |
| 100 | 52 | 115 | 200 | 230 | 135 | 170 4–Φ19 | 185 4–Φ19 | 180 4–Φ19 |
| 125 | 56 | 128 | 213 | 271 | 135 | 200 4–Φ19 | 215 4–Φ19 | 210 4–Φ19 |
| 150 | 56 | 140 | 225 | 305 | 153 | 225 4–Φ19 | 238 4–Φ23 | 240 4–Φ23 |
| 200 | 60 | 175 | 260 | 380 | 218 | 280 4–Φ19 | 295 4–Φ23 | 295 4–Φ23 |
| 250 | 68 | 202 | 290 | 462 | 218 | 335 4–Φ19 | 357 4–Φ28 | 355 4–Φ28 |
| 300 | 78 | 242 | 330 | 555 | 218 | 395 4–Φ23 | 407 4–Φ23 | 410 4–Φ28 |
| 350 | 78 | 266 | 360 | 445 4–Φ23 | 467 4–Φ23 | 470 4–Φ28 | ||
| 400 | 102 | 298 | 390 | 495 4–Φ23 | 515 4–Φ28 | 525 4–Φ31 | ||
| 450 | 114 | 315 | 410 | 550 4–Φ23 | 565 4–Φ28 | 585 4–Φ31 | ||
| 500 | 127 | 348 | 430 | 600 4–Φ23 | 620 4–Φ24 | 650 4–Φ30 | ||
| 600 | 154 | 400 | 490 | 705 4–Φ26 | 725 4–Φ27 | 770 4–Φ33 | ||
| 700 | 165 | 520 | 550 | 810 4–Φ26 | 840 4–Φ27 | 840 4–Φ33 | ||
| 800 | 190 | 591 | 610 | 920 4–Φ31 | 950 4–Φ30 | 950 4–Φ36 | ||
| 900 | 203 | 660 | 680 | 1020 4–M27 | 1050 4–M30 | 1050 4–M39 | ||
| 1000 | 216 | 670 | 730 | 1120 4–M27 | 1160 4–M33 | 1170 4–M39 | ||
| 1200 | 254 | 780 | 835 | 1340 4–M30 | 1380 4–M36 | 1390 4–M45 | ||
| 1400 | 279 | 890 | 935 | 1530 4–M33 | 1590 4–M39 | 1590 4–M45 | ||
| 1600 | 318 | 1000 | 1035 | 1760 4–M33 | 1820 4–M45 | 1820 4–M52 | ||
| Medium | Material Name | Applicable Dimension | PT Value | Chlorinity Content (ppm) | Applicable Temperature (°C) | Material Merits | Application Medium |
|---|---|---|---|---|---|---|---|
| Butterfly Plate | SAF2507 Super duplex steel, surface S3 | DN40–1200 | ≥ 3.0 | <30,000 | ≤35–150℃ | High strength, wear-resisting, anti-corrosive, impact-resistant | Limestone serosity, gypsum serosity, washing serosity, process water, waste water Same as above Same as above Process water, waste water, etc. |
| DIN1.4529 Super duplex stainless steel | DN40–1200 | ≥ 6.0 | <50,000 | ≤35–150℃ | Wear-resisting, anti-corrosive, support high-velocity, impact-resistant | ||
| C276 Nickel-based alloy with hard surface S3 | DN40–1200 | ≥ 2.5 | <50,000 | ≤35–150℃ | Hard alloy surface, anti-corrosive | ||
| Hostalen Gur | DN40–1200 | ≥ 5.0 | <5,000 | ≤35–150℃ | Anti-corrosive | ||
| CF8M Ultra-low carbon stainless steel | DN40–1200 | ≥ 5.0 | <5,000 | ≤35–150℃ | Anti-corrosive | Process water, waste water, etc. |
| Seat Type | Material Name | Applicable Dimension | PT Value | Chlorinity Content (ppm) | Applicable Temperature (°C) | Material Merits | Application Medium |
|---|---|---|---|---|---|---|---|
| Seat (liner) | CSM elastic rubber | DN40–1200 | ≥ 0 | <160,000 | ≤35–150℃ | Wear-resisting, anti-corrosive | Limestone serosity, gypsum serosity, washing serosity, process water, waste water Same as above |
| EPDM EPDM Rubber | DN40–1200 | ≥ 2.5 | <150,000 | ≤35–150℃ | Anti-corrosive, support high-velocity |
| Body Material | Code | Disc Material | Code | Shaft Material | Bush Material | Seat Material | Code | Applicable Temperature (°C) |
|---|---|---|---|---|---|---|---|---|
| Grey Iron | Z | Electroplated Ductile Iron | B1 | Stainless Steel | Lubrication Bronze | Natural Rubber (NR) | X1 | –20 ~ +85 |
| Nodular Iron | Q | Aluminum Bronze | B2 | Carbon Steel | PTFE | Hypalon | X2 | –18 ~ +135 (short-term) –18 ~ +149 (short-term) |
| Aluminum Bronze | T | ZG1Cr18Ni9Ti Stainless Steel | B3 | EPDM | X3 | –45 ~ +135 (short-term) –50 ~ +149 (short-term) | ||
| ZG1Cr18Ni9Ti Stainless | P | Titanium Steel | B4 | Chloroacetyl Rubber | X4 | –7 ~ +93 (short-term) –7 ~ +107 (short-term) | ||
| CF8M Stainless Steel | R | CF8M Stainless Steel | B5 | NBR | X5 | –12 ~ +82 (short-term) –12 ~ +93 (short-term) | ||
| Carbon Steel | C | Carbon Steel | B6 | Wear-resistant Rubber (WR) | X6 | –10 ~ +50 | ||
| CF8M Stainless Steel | B7 | Viton | X7 | –23 ~ +150 | ||||
| Heat-resistant EPDM | X9 | –20 ~ +150 | ||||||
| PTFE | F4 | +10 ~ +150 |
Note: Suitable materials include C276, DIN1.4529, 1.4469, 1.4462, 1.4401, 1.4410, 1.4408/SAF2507, Monel, 904L, 255 alloy etc.
Wafer soft seal butterfly valves are widely used in low to medium pressure systems across various industries due to their simple structure, compact design, and reliable sealing performance. The soft sealing (typically rubber or elastomeric seat) ensures tight shut-off and minimizes leakage, making these valves ideal for clean or slightly contaminated media.
Water Supply & Drainage Systems
Used for flow regulation and shut-off in municipal pipelines, HVAC systems, and fire protection networks.
Wastewater Treatment Plants
Suitable for raw sewage, sludge lines, and treated water discharge due to their corrosion-resistant design.
Chemical and Petrochemical Industries
Applicable for non-aggressive chemicals, including dilute acids, alkalis, and saltwater in low-concentration environments.
Food & Beverage Processing
Used where hygienic, non-metallic contact surfaces are required, particularly in CIP/SIP systems with EPDM or PTFE linings.
Pulp and Paper Industry
Installed in white water lines, bleach plant circuits, and chemical dosing lines.
Air and Gas Systems
Effective in low-pressure ventilation ducts, air scrubber lines, and gas supply applications.
Fresh water, seawater, wastewater
Air, gas, steam (low pressure)
Slurry and light solids
Mild chemicals and industrial liquids
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