Knife Edge Gate Valves Manufacturers
50NB to 600NB | Cast Iron to Nickel Alloy Grades | Manual, Pneumatic & Electric Actuation | Mill Certified
- Uni-directional and bi-directional designs, round, V-port or diamond port
- Size range 50NB to 600NB, cast iron to nickel alloy grades
- Manual, pneumatic or electric actuation
- 100% tested with EN 10204 3.1/3.2 mill certification
- Material Specification Chart Of Knife Edge Gate Valve
- Knife Edge Gate Valve Quality and Test reports
- Knife Edge Gate Valve Surface Coating
- Material of Construction for Knife Edge Gate Valves
- Related Types Of Knife Edge Gate Valves
- Design and Testing of Kinfe Gate Valve
- For Knife Edge Gate Valves price list
- We supply of variety Knife Edge Gate Valves
- Application Of Knife Edge Gate Valves
Aashish Metals is one of the knife edge gate valves manufacturers that plants handling slurry, ash and abrasive powders come back to, because a standard wedge gate simply is not built for that duty. A knife edge valve replaces the usual gate with a sharpened, knife-like plate that cuts straight through thick or solid-laden media instead of trying to seal past it, which is exactly why it holds up in cast steel gate valve territory that would clog or wear out fast. We manufacture knife edge gate valves in sizes from 50NB to 600NB, in cast iron and cast steel as standard, and in stainless steel, duplex steel, alloy steel, Monel, Hastelloy and Titanium where the media is corrosive as well as abrasive. Unidirectional and bi-directional designs are both available, with a choice of round, V-port or diamond port openings depending on whether the application needs simple on/off isolation or a measure of flow control. Every valve can be supplied manual, or fitted with a pneumatic or electric actuator, and comes with an EN 10204 3.1/3.2 mill test certificate and full heat-number traceability.
What Is a Knife Edge Gate Valve, and How Does It Work?
A knife edge gate valve is an isolation valve built for media a standard gate valve cannot handle cleanly: slurries, powders, fibrous solids and other thick or abrasive fluids. Instead of a flat wedge, the gate has a sharpened, blade-like edge that physically cuts through the media as it closes, rather than trying to seal past whatever is sitting in the flow path. When the valve is fully open, the gate lifts completely clear of the bore, so there is nothing in the way to trap solids or restrict flow.
Where a Standard Gate Valve Falls Short
A conventional gate or globe valve depends on a clean seating surface to shut off properly. Feed it slurry, ash or fibrous solids and material builds up on the seat, the gate jams, or the seal simply wears through. A knife edge design sidesteps the problem by cutting through the material rather than fighting it, which is why it has become the standard choice in mining, cement and wastewater plants.
Uni-Directional vs Bi-Directional Knife Gate Valves
Parameter | Uni-Directional | Bi-Directional |
|---|---|---|
Sealing Direction | Seals against pressure from one direction only | Seals against pressure from both directions |
Typical Advantage | Excellent sealing performance, cost-effective design | Greater installation flexibility, handles changing flow conditions |
Best Suited For | Straightforward slurry isolation duty | Lines where flow direction can reverse or vary |
Port Styles
- Standard round port: the usual choice for straightforward on/off isolation
- V-port: a shaped opening that gives a measure of throttling control alongside isolation, useful where some flow adjustment is needed
- Diamond port: another shaped-opening option for applications needing finer control than a standard round bore allows
End Connection Styles
- Wafer type: fits directly between two flanges, the quickest option to install where space is tight
- Lug type: threaded lugs around the body allow the valve to be bolted independently on either side, useful where one side of the line may need to be opened without disturbing the other
- Flanged end: bolts directly to matching pipe flanges, the standard choice for permanent, high-pressure installations
knife edge gate valves Material Specification
Specification | Details |
|---|---|
Size Range | 50NB to 600NB |
Pressure Rating | Up to 150 PSI (higher ratings available on request) |
Temperature Range | 0°C to 1200°C depending on seat and body material |
Body / Chest | Solid one-piece casting: Cast Iron Fg260 or Cast Steel Gr. WCB, CF8, CF8M |
Seat | Integral to body, soft seat optional |
Gate | AISI SS304, 316, 316L, 317, 317L |
Screw Spindle | AISI SS410, 304, 316 |
Nut | Brass |
Yoke | MS Plate Type |
Gland Follower / Handwheel | Cast Iron, Cast Steel or Ductile Iron / CF8, CF8M |
Gland Packing | PTFE, PTFE Impregnated |
Ends | Lugged (wafer and flanged also available) |
Port | Standard round; V-port or diamond port optional |
Choosing the body material links to the right grade family:
- Cast Iron and Cast Steel WCB are our standard bodies for general and abrasive service, cast from the same carbon steel family as our other valve ranges
- CF8, CF8M and the SS304/316/317 gate options come from our stainless steel range
- For sour or high-chloride slurry service, we also supply duplex and super duplex steel bodies
- Where corrosion resistance matters as much as abrasion resistance, we cast the same pattern in Monel, Hastelloy, Titanium and Alloy 20
knife edge gate valves Bill of Materials
Component | Material | Notes |
|---|---|---|
Body | Cast corrosion-resistant steel or cast iron | Full wetted-parts corrosion resistance |
Seat Ring | Renewable metal-to-metal, or soft seat | Standard SS, rubber or PTFE seat rings available; multi-layer gland packing for total sealing |
Gate | Stainless steel knife gate plate | Precision-buffed both sides for positive shut-off even on heavy or viscous fluid |
Stem | Stainless steel, or as specified | Double-start thread on rising or non-rising spindle for faster opening and closing |
Seal Type, Application and Temperature Range
Seal Type | Application Area | Temperature Range |
|---|---|---|
Metal to Metal | High-density media, abrasive material, where full leak-tight shut-off is not required | Suited to high-temperature service |
Soft Seated | Low-density media, leak-proof duty | Depends on seat material; consult us for the specific limit |
Actuation Options
- Manual: operated by handwheel or lever. Easy to install, cost-effective, and the right choice for infrequent operation with minimal maintenance where an operator can reach the valve easily.
- Pneumatic: compressed air drives fast, automatic operation. Well suited to hazardous areas and lines that need reliable remote control with less manual intervention, and is common in mining and cement plants where valves cycle frequently.
- Electric: an electric motor gives precise, automated control with remote monitoring and integration into a plant’s automation system, reducing labour requirements on modern process lines.
We Supplied a Comprehensive Range Of Knife Edge Gate Valves
Related Types Of Knife Edge Gate Valves
Carbon Steel Knife Gate Valve
Stainless Steel Knife Gate Valve
Alloy Steel Knife Gate Valve
Duplex Steel Knife Gate Valve
Choosing the Right Knife Edge Gate Valve
A few questions worth answering before you order:
- What is the media, and how abrasive or corrosive is it?
- What pressure rating and temperature range does the line run at?
- What size and end connection (wafer, lug or flanged) does the piping need?
- Does the application need throttling control (V-port or diamond port) or simple on/off isolation?
- Will the valve be operated manually, or does it need pneumatic or electric actuation?
- What is the installation environment: accessible for manual operation, or remote and hazardous?
Send us these details and our team will confirm the right construction, material and actuation before you order.
Knife Edge Gate Valves Price List
The knife edge gate valves price depends on factors such as valve size, pressure rating, body and gate material, seat type, end connection, and actuation. Standard cast iron and cast steel models are generally more economical, while stainless steel, duplex, super duplex, and nickel alloy valves are priced higher. For an accurate knife edge gate valve price list, contact Aashish Metals with your required size, material, pressure class, and quantity for a competitive quotation.
We supply of variety Knife Edge Gate Valves
Aashish Metal & Alloys is a Highly Acclaimed Manufacturer & suppliers of Cast Steel Gate Valves offering more than 3000 varieties in all types of Knife Edge Gate Valve in all sizes, with more then 52 countries worldwide.
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Application Of Knife Edge Gate Valves
Mining
- Slurry pipelines, tailings handling systems, ore processing plants, thickener discharge lines, mineral concentrate transportation
Cement
- Fly ash handling systems, cement silos, dust collection systems, pneumatic conveying lines, bulk material handling equipment
Wastewater Treatment
- Sludge processing systems, effluent treatment plants, sewage treatment facilities, drainage systems, water recycling plants
Other Industries
- Pulp and paper processing, chemical processing plants
Application Of Knife Edge Gate Valves
Application Industry
For More Information About Knife Edge Gate Valve please call +91-22-66362223 / 66394926 or send an email to export@aashishmetal.com
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