- Knife Gate Valve
Falcon Flow Control Slurry-Optimized Knife Gate Valve
A rugged and compact gate valve designed with a sharpened blade for on-off and throttling control of abrasive, viscous, and slurry-type media.
Full Description
The Falcon Flow Control Knife Gate Valve is specifically engineered for demanding slurry, pulp, and bulk material handling applications across industries such as mining, wastewater treatment, paper & pulp, power plants, and chemical processing. This valve features a thin, sharp-edged gate (knife) that cuts through thick fluids, sludge, or solid-laden flow to provide zero-leakage shut-off or modulating control.
Available in uni-directional and bi-directional designs, this valve is ideally suited for low-pressure and high-solids service environments. Its self-cleaning seat, full-port design, and optional purge ports ensure long life and low maintenance, even in the harshest media conditions.
Features & Benefits
Sharp Knife Gate
Cuts through solids, slurries, and thick flows
Full-Bore Flow
Minimal pressure drop and clogging
Flushable Body Design
Ports allow purging to prevent media buildup
Multiple Seat Options
Metal or resilient seats for versatile media compatibility
Low Operating Torque
Simple handwheel or actuator operation
Corrosion-Resistant Options
Available in full stainless steel and coated steel
Compact and Lightweight
Easier installation in tight areas
Self-Cleaning Seat
Prevents accumulation of slurry or fiber materials
Optional Bi-Directional Seal
Double-sealing edge for flow in both directions
Certifications & Standards
- MSS-SP-81 (design standard)
- ASME B16.5 / EN1092-1 (flange dimensions)
- API 598 (seat and hydro test)
- PED 2014/68/EU (on request)
- ISO 5208 – Leakage classes
- ATEX compliant options for hazardous locations
- NACE MR0175 for corrosive or sour media (on request)
Application Segments
Mineral and ore slurry pipelines
Wastewater and sewage systems
Paper & pulp industries (stock lines)
Fly ash and bottom ash disposal
Cement & sand conveying
Food and pharmaceutical powder discharge
Chemical thick fluid isolation
Agricultural irrigation canals
Product Line
Falcon Slurry Series
Knife Gate Valves
Size Range
NPS (inch)
DN (mm)
2” – 48”
DN 50 – DN 1200
Pressure Class
Design Pressure
Range
PN10 / PN16
Up to 10 bar (150 psi) standard
Custom Builds
Up to 25 bar (365 psi)
Materials
- Body: Cast Iron, Ductile Iron, Carbon Steel, Stainless Steel (CF8, CF8M)
- Gate (Knife): SS304, SS316, 17-4PH, Duplex, or Hardfaced Steel
- Seat Options: Metal-to-metal, Resilient (EPDM, NBR, PTFE, Viton), or PTFE-lined
- Packing: Graphite, PTFE, or braided fiber with lantern ring
- Yoke / Stem / Gland: Stainless Steel or Carbon Steel
- Actuation System: Manual, Pneumatic, Electric, Hydraulic
Standard Connections
- Wafer or Lug Type – ANSI B16.5, EN1092-1
- Flanged – On request
- Face-to-Face – MSS-SP-81, EN558
- ISO 5211 Mounting Pad for actuators
Design Options
- Uni-directional or Bi-directional sealing
- Rising or Non-rising stem
- Manual gear, pneumatic cylinder, electric or hydraulic actuator
- PTFE or elastomer-lined body
- Extended bonnets for buried service
- Lockable handwheel
- Flushing ports, purge connections
- Dust covers and stem protection