Bevel gear knife gate valve is an industrial valve with a nominal diameter range of DN50-DN1200 and a nominal pressure range of 1.0MPa-1.6MPa. Valve body materials include cast steel, stainless steel, and ductile iron. It adopts a wafer or flange connection structure, and the valve seat sealing ring uses hard alloy welding technology.
Materials such as nitrile rubber, EPDM rubber, and fluororubber are also available. It is suitable for media containing particles and fibers, such as heavy wastewater, pulp, and coal slurry, and is mainly used in industrial pipelines in mining, wastewater treatment, petrochemical, power, and papermaking industries.
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Bevel Gear Kinfe Gate Valve Technical parameters
Size Range:2″ to 24″ (DN50-DN600)
Connection Options:Bevel Gear Operated
Working Pressure: PN10/PN16
Working Temperature:-29°C to 425°C
Sealing Options:Metal-to-Metal, Resilient Seat, Graphite, PTFE
Manufacturing Method:Cast, Forged, Machined
Applicable Medium:Water, Oil, Gas, Steam, Chemical Fluids
Bevel Gear Kinfe Gate Valve Main Performance Specifications
| Nominal Pressure PN (MPa) | Shell Test Pressure (MPa) | Seal Test Pressure (MPa) | Working Temperature (°C) | Applicable Medium |
|---|---|---|---|---|
| 1.0 | 1.5 | 1.1 | ≤80°C | Syrup, pulp, sewage, coal slurry, ash, slag-water mixture |
| 1.6 | 2.4 | 1.8 | ≤425°C | Same as above |
Bevel Gear Kinfe Gate Valve Main Material Specifications
| Component | Material |
|---|---|
| Body, Cover | Stainless steel, carbon steel, gray cast iron |
| Gate | Carbon steel, stainless steel |
| Stem | Stainless steel |
| Sealing Face | Rubber, PTFE, stainless steel, hard alloy |
Bevel Gear Kinfe Gate Valve Main External and Connection Dimensions
| PN (MPa) | DN (mm) | L | D | D1 | D2 | H | N-M | DO |
|---|---|---|---|---|---|---|---|---|
| 1.0 | 50 | 48 | 160 | 125 | 100 | 370 | 4–M16 | 180 |
| 65 | 48 | 180 | 145 | 120 | 400 | 4–M16 | 180 | |
| 80 | 50 | 195 | 160 | 135 | 440 | 4–M16 | 220 | |
| 100 | 50 | 215 | 180 | 155 | 510 | 8–M16 | 220 | |
| 125 | 57 | 245 | 210 | 185 | 580 | 8–M16 | 230 | |
| 150 | 57 | 280 | 240 | 210 | 690 | 8–M20 | 280 | |
| 200 | 64 | 335 | 295 | 265 | 800 | 8–M20 | 360 | |
| 250 | 70 | 390 | 350 | 320 | 960 | 12–M20 | 360 | |
| 300 | 76 | 440 | 400 | 368 | 1200 | 12–M20 | 400 | |
| 350 | 89 | 505 | 460 | 428 | 1360 | 16–M22 | 400 | |
| 400 | 89 | 565 | 515 | 482 | 1550 | 16–M22 | 400 | |
| 450 | 95 | 615 | 565 | 532 | 1700 | 20–M22 | 530 | |
| 500 | 108 | 670 | 620 | 585 | 1900 | 20–M22 | 530 | |
| 600 | 114 | 780 | 725 | 685 | 2400 | 20–M27 | 600 | |
| 1.6 | 50 | 48 | 185 | 145 | 118 | 400 | 4–M16 | 180 |
| 65 | 48 | 200 | 160 | 132 | 440 | 8–M16 | 180 | |
| 80 | 50 | 210 | 160 | 132 | 440 | 8–M16 | 230 | |
| 100 | 50 | 230 | 180 | 156 | 510 | 8–M16 | 220 | |
| 125 | 57 | 270 | 210 | 184 | 580 | 8–M16 | 230 | |
| 150 | 57 | 300 | 240 | 211 | 690 | 8–M20 | 280 | |
| 200 | 64 | 360 | 295 | 266 | 800 | 12–M20 | 360 | |
| 250 | 70 | 425 | 355 | 319 | 960 | 12–M22 | 400 | |
| 300 | 76 | 460 | 410 | 370 | 1200 | 12–M22 | 400 | |
| 350 | 89 | 520 | 470 | 429 | 1360 | 16–M22 | 400 | |
| 400 | 89 | 580 | 525 | 480 | 1550 | 16–M27 | 400 | |
| 450 | 95 | 640 | 585 | 548 | 1700 | 20–M27 | 530 | |
| 500 | 108 | 715 | 650 | 609 | 1900 | 20–M30 | 530 | |
| 600 | 114 | 840 | 775 | 720 | 2400 | 20–M36 | 600 |
Features of Bevel Gear Knife Gate Valve
Transmission Mechanism: Utilizes a bevel gear (spiral bevel gear) drive. Rotating the bevel gear drives the valve stem to rise and fall vertically, opening and closing the gate. Compared to the handwheel operation of ordinary gate valves, bevel gear transmission requires less effort, especially suitable for large-diameter or high-pressure valves.
Gate Design
Knife Gate Structure: The gate head has a slanted cutting edge, providing a shearing function to cut fibers, particles, and other media, preventing blockage.
Clearance-Free Opening and Closing: The gate and sealing ring fit tightly, achieving bidirectional sealing and preventing media leakage.
Various Materials: Gate materials include stainless steel (such as 2Cr13, 304, 316L), hard alloy, etc., adaptable to various corrosive media.
Sealing Methods
Hard Seal: The valve seat sealing ring uses cobalt-based hard alloy welding technology, offering excellent wear resistance and scratch resistance, suitable for high-temperature and high-pressure conditions.
Soft Seal: Materials such as nitrile rubber, EPDM rubber, and fluororubber are available. These offer good sealing performance but have lower temperature resistance (typically ≤150℃). Connection Methods: Supports wafer or flange connections, offering flexible installation and suitability for various piping systems.
Bevel Gear Kinfe Gate Valve Applications:
- Pipelines Containing Particulate Media: Suitable for coal washing pipelines, filter slurry pipelines, and ash discharge pipelines in industries such as mining, coal washing, and steel. It can cut off solid particles such as coal slag, ore sand, and furnace slag.
- Sewage Treatment Systems: Used for pipelines handling sewage, slurry, waste, and clarified water containing suspended solids to prevent media blockage.
- Paper Industry: Suitable for conveying pulp and material-water mixtures of any concentration. The knife gate structure can scrape off adhering substances from the sealing surface.
- Power Industry: Used for pipelines handling ash slurry, boiler feedwater, etc., to control fluid flow and pressure.
- Petrochemical Industry: Suitable for cutting off media under high temperature and high pressure conditions, such as oil and chemical raw material conveying pipelines.
