Investment Casting & Industrial Valves 
Large-Bore Wafer Knife Gate Valve (80-500mm Stainless Steel Valve)
- Nominal Diameter: DN80-DN500
- Pressure Rating: PN1.0-PN2.5 MPa
- Flange End: GB/T 9124, ANSI B16.5
- Suitable Media: Water, Steam, Oil, Slurry, Corrosive & Food-Grade Media, etc.
- Operating Temperature: -40 to 120℃
- Method of Operation: Manual, Electric, Pneumatic, Hydraulic
- Inspection & Testing: GB/T 13927, API 598
- Surface Treatment: Pickling, Passivation, Polishing (or as per customer request)
| Body | 304, 304L, 316, 316L |
| Gate | 304, 304L, 316, 316L |
| Seat | PU/NBR |
| Nut | H62 |
| Stem | 304, 304L |
| Packing | NBR/EPDM |
Large-bore wafer stainless steel knife gate valves resist corrosion, high pressure, and high flow, making them suitable for petrochemical, energy, water, environmental, metallurgy, marine, food, pharmaceutical, and new materials industries. Valve type and stainless steel grade are selected based on the pipeline conditions, flow requirements, and properties of the medium in each application.
| No. | Component | Quantity |
| 1 | Bearing Housing | 1 |
| 2 | Stem | 1 |
| 3 | Gate | 1 |
| 4 | Support Plate | 2 |
| 5 | Packing Gland | 1 |
| 6 | Gate Seal Block | 1 |
| 7 | Body | 1 |
| 8 | Wear Sleeve | 2 |
| 9 | Gasket | 1 |
| 10 | Bottom Plate | 1 |
| 11 | Drain Pipe | 1 |
| Size | L | D | D1 | D2 | D0 | N-M | H1 (Manual Operated) | H2 (Electric Operated) | |
| DN | NPS | mm | mm | mm | mm | mm | mm | mm | mm |
| 80 | 3" | 55 | 200 | 160 | 132 | 240 | 8-M16 | 380 | 660 |
| 100 | 4" | 55 | 220 | 180 | 156 | 240 | 8-M16 | 460 | 740 |
| 150 | 6" | 60 | 285 | 240 | 211 | 300 | 8-M20 | 550 | 830 |
| 200 | 8" | 70 | 340 | 295 | 266 | 300 | 12-M20 | 650 | 920 |
| 250 | 10" | 70 | 405 | 355 | 319 | 400 | 12-M24 | 730 | 1010 |
| 300 | 12" | 76 | 460 | 410 | 370 | 400 | 12-M24 | 830 | 1158 |
| 350 | 14" | 76 | 520 | 470 | 429 | 550 | 16-M24 | 910 | 1238 |
| 400 | 16" | 82 | 580 | 525 | 480 | 550 | 16-M27 | 1020 | 1348 |
Notes
- The valve specifications shown in the tables above are for reference only.
- Product specifications and technical data may change due to product improvements or updates, please contact us for the latest information.
- Valves can be customized according to customer requirements.
At SDPLDL, we are a trusted manufacturer specializing in precision investment casting and industrial valves for global markets. We operate our own manufacturing facility featuring over 200 sets of advanced manufacturing equipment and an in-house testing center equipped with 16-ton dynamic balancing machines. Our integrated manufacturing capabilities allow us to seamlessly produce precision investment casting valves, custom stainless steel large-diameter valves, and slurry valves under strict compliance with ISO 9001 standards.
