DN1000 Uni-Directional Rising Stem Wafer Manual Handwheel Knife Gate Valve
The DN1000 (40 Inch) Wafer Knife Gate Valve is a critical component engineered for the most demanding, high-volume isolation requirements in heavy industry. Its ultra-large bore size ensures maximum flow capacity with minimal head loss, making it the ideal choice for bulk transport lines containing abrasive slurries, high-consistency pulp, or large solid particles.
This valve utilizes the compact Wafer design, minimizing the face-to-face dimension compared to traditional flanged valves of this size. The reliable Manual Handwheel operation, paired with the safety-enhancing Rising Stem, delivers direct, unpowered control where high volumes of media must be swiftly and securely isolated.
The DN1000 Uni-Directional Wafer Knife Gate Valve is a large-diameter isolation valve designed to handle demanding flow conditions in pipelines carrying liquids, slurries, or media with high solids content. Its wafer-type body makes it compact and easy to install between flanges, while the rising stem design provides clear visibility of the valve position.
This valve ensures tight shut-off in one flow direction, making it an excellent choice for wastewater treatment, mining slurry transport, and power plant applications. For DN1000 size, manual operation is available through a handwheel, while bevel gear, electric, or pneumatic actuators can be supplied for easier operation.
Key Features
Wafer Connection – Compact design, easily mounted between flanges.
Uni-Directional Sealing – Reliable shut-off against pressure from one side.
Large-Diameter Capability – Engineered for DN1000 service with reinforced body and gate.
Rising Stem Design – Provides a clear indication of valve open/close position.
Flexible Actuation Options – Manual handwheel as standard; bevel gear, electric, or pneumatic actuation available on request.
Heavy-Duty Construction – Designed for abrasive and high-density media handling.
Technical Specifications
Size: DN1000
Connection Type: Wafer (sandwiched between flanges)
Sealing Type: Uni-directional
Stem Design: Rising stem
Actuation: Manual handwheel (standard); Bevel Gear / Electric / Pneumatic (optional)
Body Material Options: Cast iron, ductile iron, carbon steel, stainless steel (304/316), duplex steel
Seat Options: Resilient seat (EPDM, NBR) or metal seated for high temperature/abrasive service
Pressure Rating: Available in standard industrial ratings (customizable)
Typical Applications
The DN1000 Uni-Directional Wafer Knife Gate Valve is suitable for a wide range of heavy-duty industries, including:
Wastewater Treatment – Sludge isolation, raw sewage, and solids-laden flows.
Mining Industry – Tailings transport, high-density mineral slurries, and abrasive suspensions.
Power Plants – Flue gas desulfurization (FGD) systems, bottom ash, and slurry pipelines.
Pulp & Paper – Fiber-rich stock, pulp, and viscous processing media.
Why Choose TOT Valve?
At TOT Valve, we deliver robust and cost-effective valve solutions for demanding flow control applications. Our DN1000 Knife Gate Valves are built to withstand heavy loads, reduce downtime, and provide long service life. With a full range of materials, sealing options, and actuator configurations, we ensure the perfect fit for your project.
Need to integrate with automation systems? We can customize this DN1000 model with a robust Gearbox, Pneumatic Cylinder, or Electric Actuator for remote or automated control. Contact us for a detailed engineering consultation.
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