The 12-inch Stainless Steel Wafer Knife Gate Valve is designed for reliable on-off control in systems handling slurries, powders, viscous liquids, or corrosive fluids. Built with a full stainless steel body and a compact wafer-type design, this valve delivers space-saving installation and long-lasting performance in demanding industrial environments.
Key Features
Valve Size: 12 inch (DN300)
Design Type: Wafer type knife gate valve (centered between flanges)
Body Material: Stainless Steel 304 / 316 (optional Duplex SS)
Gate (Blade): SS304 / SS316, mirror-finished, corrosion-resistant
Seat Options: Metal seat, EPDM, NBR, or PTFE for tight sealing
Sealing Type: Unidirectional or Bidirectional (customizable)
End Connection: Wafer mounting for ANSI, DIN, or JIS flanges
Face-to-Face: MSS-SP-81 or manufacturer standard
Technical Specifications
| Parameter | Value |
|---|---|
| Nominal Size | 12″ / DN300 |
| Pressure Rating | PN10 / 150 PSI (higher on request) |
| Temperature Range | -20°C to +250°C (seal-dependent) |
| Operation Type | Manual / Pneumatic / Electric / Hydraulic |
| Leakage Rate | Zero leakage (tested per MSS-SP-81) |
| Mounting Orientation | Horizontal or Vertical |
Available Actuation Options
Manual: Handwheel or gear-operated
Pneumatic: Double-acting or spring-return cylinder
Electric: ON/OFF or modulating type, IP67 housing
Hydraulic: High-force applications (on request)
→ All actuators can be supplied with limit switches, solenoid valves, and position indicators.
Benefits of Our 12″ SS Wafer Knife Gate Valve
✅ Corrosion-Resistant: All stainless-steel construction resists rust and chemicals
✅ Space-Saving Design: Wafer body minimizes flange-to-flange length
✅ Quick Installation: Lightweight and compact, ideal for tight spaces
✅ Low Maintenance: Simple internal structure and self-cleaning gate
✅ Industrial Grade: Built for continuous operation in tough conditions
Typical Applications
Mining & Minerals: Slurry handling and tailings discharge
Wastewater Treatment: Thick sludge, aerated grit systems
Pulp & Paper: Pulp stock, wood chip slurry
Food & Beverage: Sanitary process control (with polished SS)
Power Generation: Fly ash, bottom ash isolation
Chemical Processing: Acids, alkalis, and aggressive media
Quality & Testing
Each valve is 100% factory tested for:
Pressure tightness
Gate travel smoothness
Seat integrity in both directions (optional)
Material certification (EN 10204 3.1 available)
Meets international standards: MSS-SP-81, EN 558, and API 598 testing where applicable.
Optional Customizations
Bonneted version for extended sealing life
Purge ports for seat cleaning
Position feedback sensors
Anti-abrasive hard-facing for slurry service
Duplex or super duplex stainless steel on request
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