Bonneted Knife Gate Valve
The Bonneted Knife Gate Valve is designed for high-pressure and high-temperature applications where enhanced sealing and structural integrity are required. The addition of a bonnet improves pressure containment, reduces leakage, and allows the valve to withstand more demanding operating conditions. This valve is widely used in mining, pulp & paper, chemical processing, power plants, and wastewater treatment.
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Technical Specifications
| Specification | Details |
|---|---|
| Valve Type | Bonneted Knife Gate Valve |
| Sizes | 2″ – 48″ (custom sizes available) |
| Pressure Class | PN16, PN25, ANSI 150 – 300 |
| Body Materials | Carbon Steel, Stainless Steel, Duplex Steel |
| Seat Materials | Resilient, PTFE, Metal |
| Actuation | Manual, Gear, Pneumatic, Hydraulic, Electric |
| Operation | Fully Open / Fully Closed |
| Applications | Slurry, Abrasive Media, Pulp & Paper, Mining, Chemical Processing |
Key Features
Bonnet Design: Provides enhanced pressure containment and improved sealing performance.
Durable Gate and Body: Reinforced gate efficiently cuts through abrasive media and slurries.
Multiple Seat Options: Resilient, PTFE, or metal seats to meet different service conditions.
Flexible Actuation: Manual, gear-operated, pneumatic, hydraulic, or electric actuation options.
Corrosion & Abrasion Resistant: Body and gate materials include carbon steel, stainless steel, duplex alloys, or custom alloys.
Bi-Directional Sealing: Ensures tight shutoff in both flow directions.
Applications
Mining & Mineral Processing: Handles abrasive slurries in high-pressure pipelines.
Pulp & Paper Industry: Suitable for stock and pulp lines under high-pressure conditions.
Chemical Processing: Handles corrosive or viscous fluids with enhanced sealing.
Power Plants: Ideal for ash handling, cooling water, and process pipelines.
Wastewater Treatment: Effective in sludge, grit, and viscous waste pipelines.
Benefits
High Pressure Capability: Bonneted design withstands higher pressures than standard knife gate valves.
Reliable Shutoff: Bi-directional sealing ensures minimal leakage.
Durable Construction: Reinforced gate and body resist wear in abrasive media.
Reduced Maintenance: Optional replaceable seat designs allow in-line servicing.
Flexible Installation: Compatible with flanged, wafer, or lugged piping systems.
Ordering & Customization
We provide custom configurations for valve size, pressure rating, body and seat materials, and actuation methods to meet your project requirements.
* We are not just providing simple quotes but experts in selection, calculation, and drawing.
Bonneted Knife Gate Valve – FAQ
A bonneted knife gate valve features a bonnet covering the top of the valve body, which improves pressure containment, sealing, and structural strength. It is designed for high-pressure and high-temperature applications with abrasive or viscous media.
The bonnet provides additional reinforcement and prevents leakage, allowing the valve to withstand higher pressures and more demanding operating conditions compared to standard knife gate valves.
Typical sizes range from 2" to 48", with pressure classes from PN16, PN25, up to ANSI 150–300. Custom sizes and pressure ratings are available on request.
Common body materials include carbon steel, stainless steel, and duplex alloys. Seat options include resilient rubber, PTFE, or metal to match your specific application.
Valves can be manually operated, gear-operated, or actuated pneumatically, hydraulically, or electrically for flexibility in different systems.
Yes. The reinforced gate, bonneted body, and robust construction make them ideal for abrasive, viscous, or solid-laden media in mining, pulp & paper, chemical processing, and wastewater treatment.
Provide your project specifications—size, pressure rating, material, seat type, and actuator preference—and our sales team will provide a tailored quotation within 24 hours. Bulk orders or large projects may qualify for discounts.
