GFI Knife Edge Gate Valves
GFI Knife Edge Gate Valves are designed for reliable isolation of challenging media such as slurry, pulp, powders, wastewater, dry bulk solids and other abrasive or viscous fluids. The sharp knife-edged gate cuts through the medium during operation, helping provide dependable shut-off even when conventional gate valves may be unsuitable.
With a compact wafer-style construction, full-port flow path and a robust sealing arrangement, GFI Knife Edge Gate Valves offer efficient operation, easy maintenance and dependable performance across demanding process applications. Manual, pneumatic, electric and hydraulic actuation options can be provided according to application requirements.
Key Features
Knife-Edge Gate Design
Sharp-edged gate effectively penetrates slurry, pulp, fibrous and semi-solid media for reliable isolation.
Full-Port Flow Passage
Full opening helps reduce flow restriction and allows the valve to handle media containing suspended solids.
Abrasion Resistant Construction
Robust body, gate and seating options are available for demanding abrasive and corrosive services.
Bi-Directional Options
Bi-directional configurations provide dependable isolation where flow direction may change.
Low Maintenance
Simple construction and accessible components help reduce maintenance time and operational downtime.
Actuation Flexibility
Available with handwheel, chain wheel, pneumatic, electric or hydraulic actuation as required.
Available Types
Wafer Knife Gate Valve
Compact and lightweight configuration designed for slurry, wastewater, pulp and general industrial isolation applications.
Lug Type Knife Gate Valve
Lug-style body construction provides secure installation and is suitable for applications requiring individual flange-side maintenance.
Uni-Directional Knife Gate Valve
Designed for applications where isolation is required primarily in one specified flow direction.
Bi-Directional Knife Gate Valve
Provides shut-off in both flow directions and is suitable for process lines where flow direction can vary.
Technical Specifications
| General Specifications | |
|---|---|
| Valve Type | Knife Edge Gate Valve |
| Size Range | 50mm to 1200mm (2" to 48") |
| Pressure Rating | Up to Class 150 / Application Dependent |
| End Connections | Wafer, Lug, Flanged |
| Body Material | Cast Iron, Ductile Iron, Carbon Steel, Stainless Steel |
| Gate Material | Stainless Steel / SS304 / SS316 |
| Seat Options | Resilient Seat, EPDM, NBR, PTFE, Metal Seat – Application Dependent |
| Operation | Handwheel, Chain Wheel, Pneumatic, Electric or Hydraulic Actuation |
| Temperature Range | Application and Material Dependent |
| Testing | As per applicable valve testing requirements |
Applicable Industries
Typical Applications
Slurry Isolation
Suitable for abrasive slurry lines in mining, mineral processing and related industries.
Pulp & Paper Processing
Designed to handle pulp, fibre-containing liquids and process media in paper manufacturing systems.
Wastewater & Sewage
Provides practical isolation for wastewater lines, sludge handling and sewage treatment systems.
Dry Bulk & Powder Handling
Suitable for selected powder and bulk-solid handling applications where a knife-edge gate is beneficial.
Manufacturing Standards
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