Reliable | Efficient | Engineered for Performance
Large Diameter Knife Gate Valves Manufacturer & Supplier
Let’s first look at what a knife gate valve is? A knife gate valve is a linear motion valve used to start or stop fluid flow. It consists of a sharp, beveled gate that slides perpendicular to the flow path. When the gate is fully closed, it provides a tight seal; when open, it offers a full-bore, non-obstructed passage. This simple, robust design makes knife gate valves ideal for applications involving slurries, viscous liquids, or dry bulk solids where conventional valves would easily clog or fail.
When reliability, durability, and performance matter — TOT Valve delivers. As a leading manufacturer and supplier of large diameter industrial knife gate valves, we help you streamline fluid control across demanding applications with confidence.
Whether you’re operating in mining, pulp & paper, wastewater treatment, or chemical processing, our expertly engineered knife gate valves offer efficient shut-off and long-term reliability — without compromise.
Be careful when choosing a new valve supplier, the disappointment of poor quality can last much longer than the joy of a low price!
Advantage of Large Diameter Knife Gate Valves
At TOT Valve, we specialize in manufacturing industrial-grade large diameter knife gate valves tailored for abrasive and high-volume applications. Our valves are engineered to deliver tight shut-off, minimal pressure drop, and long-term reliability—even in slurry-filled, corrosive, or high-pressure environments.
Sharp, Self-Cleaning Gate
The beveled gate slices through media to prevent clogging and ensure a complete shut-off, ideal for slurries and solids.
Full-Bore Flow
When fully open, the valve provides an unobstructed flow path, minimizing pressure loss and maximizing throughput.
Bidirectional Sealing
Our advanced sealing designs provide reliable shut-off in both directions, enhancing system safety and flexibility.
Heavy-Duty Construction
From robust body materials to reinforced packing glands, our large diameter knife gate valves are built to withstand severe conditions and heavy-duty use.
Certifications
Our Large Diameter knife gate valves meet:
API 609
ISO 9001
CE/PED
OEM & Customization Support
Need a special actuator, material combination, or flange dimension for your DN>700 pipeline? Our engineers are ready to co-develop solutions that fit your application and installation constraints.
Explore Our Large Diameter Knife Gate Valve Types
We offer a full line of large diameter knife gate valves to match your system specifications and project requirements.
By Body Type
Wafer Knife Gate Valve
Cost-effective and compact; ideal for tight spaces. Sandwiched between flanges.
Lug Knife Gate Valve
Allows for easy disassembly from either side of the pipeline.
Flanged Knife Gate Valve
High-strength connection, perfect for high-pressure or large-bore applications.
By Material
Stainless Steel Knife Gate Valve
For corrosive or sanitary environments
Ceramic Knife Gate Valve
For extreme abrasive and corrosive media.
By Actuation Method
Manual Knife Gate Valve
Electric Knife Gate Valve
Pneumatic Knife Gate Valve
Hydraulic Knife Gate Valve
Large Diameter Knife Gate Valve Key Components & Materials
Body and Disc
- Cast Iron / Ductile Iron: High strength and affordability;
- Stainless Steel: For sanitary or corrosive environments
- Ceramics： For extremely corrosive and abrasive media.
- EPDM / NBR: Suitable for water, wastewater, and general industrial media.
- PTFE: Chemically resistant for aggressive fluids.
- Metal Seats: For severe service, abrasive particles, and high-temperature applications.
- Ceramics： High corrosion resistance and wear resistance, especially suitable for liquids containing solid particles and slurries.
| Name | Material | Name | Material |
|---|---|---|---|
| Valve Body | WCB/Stainless Steel | Gate Pressure Plate | 25# |
| Valve Gate | Stainless Steel | Packing Bushing | 1Cr13 |
| Seat Material | NBR/PTFE/Ceramics | Gland | WCB/Stainless Steel |
| Stem | 2Cr13 | Support | Q235 |
| Fasteners | B7/2H | Actuator | TBD |
Ceramic vs. Stainless Steel Knife Gate Valves
| Feature | Ceramic Knife Gate Valve | Stainless Steel Knife Gate Valve |
| Corrosion Resistance | Excellent — ideal for acids, alkalis, salts, and oxidizing media | Good — but susceptible to certain corrosive environments |
| Wear Resistance | Superior — ideal for slurries, abrasive particles, and erosion-prone flows | Moderate — sealing surfaces may wear faster under abrasive conditions |
| Service Life | Long-lasting with minimal maintenance | Shorter life span, frequent maintenance needed |
| Temperature Tolerance | Depends on ceramic type; may limit at very high temps (>400°C) | Excellent — many metals withstand 800°C or more |
| Cost Comparison | Higher upfront cost, but lower lifecycle cost | Lower initial cost, higher maintenance cost over time |
| Common Applications | Mining, chemical processing, FGD, abrasive or slurry media | General industrial use, water, HVAC, food processing |
How to Choose the Right Large Diameter Knife Gate Valve for Your System
When you are choosing what kind of knife gate valve to use in your system, you can contact us now. Our professional staff will help you make a wise decision based on the situation of your conveying system. Here we have summarized the common knife gate valve selection factors for your reference and hope to be helpful to you.
Fluid Type: Use stainless steel for corrosive media; ductile iron for general use; ceramic for highly abrasive or acidic slurries.
Operation Mode: Manual for simple control; actuators for automation and remote control.
Pressure & Temperature: Choose flange connections and metal seats for higher system demands.
Connection Type: Wafer for budget installs; lug for isolation; flanged for heavy-duty use.
Seat Material: EPDM for water; metal for high-temp; ceramic for abrasive and corrosive media.
