Size Range: DN150-DN900
Connection Options: Wafer
Working Pressure: PN10 ~PN16
Working Temperature:-29°C to 425°C
Sealing Options: Rubber, PTFE, Stainless steel, Hard alloy
Manufacturing Method:Cast, Forged, Machined
Applicable Medium:Water, Oil, Gas, Steam, Chemical Fluids
The wafer knife gate valve is a compact, bidirectional valve designed for tight shut-off in systems handling slurry, pulp, powder, and other viscous or corrosive media. Featuring a thin, sharp-edged gate, it cuts through thick flow media with minimal pressure drop. Its wafer-style body allows easy installation between flanges, making it ideal for space-constrained pipelines in industries like mining, wastewater treatment, chemical processing, and pulp & paper. Engineered for durability and low maintenance, this valve is available in various materials and seat options to suit demanding applications.
Nominal Pressure PN (MPa) | Test Pressure (MPa) | Working Temperature (℃) | Applicable Medium | |
|---|---|---|---|---|
| Shell | Seal | |||
| 1.0 | 1.5 | 1.1 | ≤100℃ (rubber) | Slag, pulp, sewage, cinder, ash, mud, oil |
| 1.6 | 2.4 | 1.8 | H / Y ≤ 425℃ | |
| Body, Cover | Gate | Stem | Sealing Surface |
|---|---|---|---|
| Stainless steel, carbon steel, gray cast iron | Carbon steel, stainless steel | Stainless steel | Rubber, PTFE, stainless steel, hard alloy |
| PN (MPa) | DN (mm) | L | D | D1 | D2 | H | N-M | D0 |
|---|---|---|---|---|---|---|---|---|
| 1.0 | 50 | 60 | 160 | 125 | 100 | 300 | 4–M16 | 180 |
| 65 | 60 | 180 | 145 | 120 | 320 | 4–M16 | 180 | |
| 80 | 70 | 195 | 160 | 135 | 340 | 4–M16 | 220 | |
| 100 | 71 | 215 | 180 | 155 | 420 | 4–M16 | 220 | |
| 125 | 71 | 245 | 210 | 185 | 430 | 4–M16 | 230 | |
| 150 | 71 | 280 | 240 | 210 | 510 | 8–M20 | 250 | |
| 200 | 80 | 335 | 295 | 265 | 580 | 8–M20 | 320 | |
| 250 | 90 | 390 | 350 | 320 | 720 | 12–M20 | 360 | |
| 300 | 90 | 440 | 400 | 362 | 840 | 12–M20 | 400 | |
| 350 | 100 | 500 | 460 | 428 | 950 | 16–M20 | 400 | |
| 400 | 110 | 565 | 515 | 482 | 1050 | 16–M22 | 430 | |
| 450 | 120 | 615 | 565 | 532 | 1170 | 20–M22 | 530 | |
| 500 | 130 | 670 | 615 | 585 | 1280 | 20–M22 | 530 | |
| 600 | 140 | 780 | 725 | 685 | 1490 | 20–M27 | 600 |
Wafer knife gate valves are widely used in applications where a clean, unobstructed shut-off is required in systems handling thick, abrasive, or solid-laden fluids. Common industries include:
Mining & Mineral Processing: For slurry, tailings, and abrasive media.
Pulp & Paper: Used in pulp stock lines, recycle systems, and fiber recovery.
Wastewater Treatment: For sludge, raw sewage, and grit handling.
Chemical & Petrochemical: Suitable for corrosive fluids and chemical slurries.
Cement & Bulk Handling: Controls the flow of powders, ash, and dry solids.
Its compact wafer design makes it ideal for systems with limited space, while the sharp gate ensures reliable isolation in challenging flow conditions.
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