Bonnetless Knife Gate Valve
The Bonnetless Knife Gate Valve is designed for light to medium-duty applications where a simple, compact design is preferred. By eliminating the bonnet, this valve reduces overall weight and cost while still providing reliable shutoff for slurries, viscous fluids, and abrasive media. It is commonly used in wastewater treatment, pulp & paper, mining, and chemical processing industries where moderate pressure handling is sufficient.
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Technical Specifications
| Specification | Details |
|---|---|
| Valve Type | Bonnetless Knife Gate Valve |
| Sizes | 2″ – 48″ (custom sizes available) |
| Pressure Class | PN10, PN16, ANSI 150 |
| Body Materials | Cast Iron, 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, Wastewater |
Key Features
Compact Bonnetless Design: Simplified construction reduces weight and cost.
Durable Gate and Body: Reinforced gate efficiently cuts through solids and abrasive media.
Multiple Seat Options: Resilient, PTFE, or metal seats available to suit different operating conditions.
Versatile Actuation: Manual, gear-operated, pneumatic, hydraulic, or electric operation.
Corrosion & Abrasion Resistant: Body and gate materials include carbon steel, stainless steel, duplex alloys, or custom alloys.
Bi-Directional Sealing: Provides tight shutoff in both flow directions.
Applications
Mining & Mineral Processing: Handles abrasive slurries in moderate pressure pipelines.
Pulp & Paper Industry: Suitable for pulp and stock lines with moderate pressure requirements.
Wastewater Treatment: Effective in sludge, grit, and viscous waste pipelines.
Chemical Processing: Suitable for corrosive or viscous fluids where extreme pressure is not required.
Benefits
Lightweight and Cost-Effective: Bonnetless design reduces material and manufacturing costs.
Reliable Shutoff: Tight sealing in both flow directions.
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 wafer, lug, or flanged piping systems.
Ordering & Customization
We offer 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.
Bonnetless Knife Gate Valve – FAQ
A bonnetless knife gate valve is designed without a bonnet, reducing overall valve weight and simplifying maintenance. It provides a reliable shutoff for slurry, viscous, or abrasive media while allowing easy installation in confined spaces.
Unlike bonneted valves, bonnetless knife gate valves have fewer components, which lowers cost, reduces potential leak points, and allows quicker maintenance, while still maintaining robust performance for demanding applications.
Typical sizes range from 2" to 48", with pressure classes from PN10, PN16, up to ANSI 150–300. Custom sizes and pressure ratings can be provided upon request.
Common body materials include cast iron, carbon steel, stainless steel, and duplex alloys. Seat options include resilient rubber, PTFE, or metal, chosen based on the type of media and operating conditions.
Bonnetless knife gate valves can be operated manually, via gear mechanism, or actuated pneumatically, hydraulically, or electrically, depending on your system’s requirements.
Yes. The robust gate design and durable body make bonnetless knife gate valves ideal for abrasive, viscous, and solid-laden media in industries like mining, pulp & paper, and wastewater treatment.
Share your project details—size, pressure rating, body material, seat type, and actuator preference—with our sales team. We will provide a customized quotation within 24 hours. Large or bulk orders may qualify for special pricing.
