The Stainless Steel Wafer Type Handwheel Bonneted Knife Gate Valve is a compact and corrosion-resistant solution for isolating flow in liquid, slurry, and semi-solid systems. Designed with a wafer-style body, manual handwheel operation, and a sealed bonnet structure, it provides reliable shut-off performance while preventing external leakage and environmental contamination.
Key Features
Valve Type: Wafer-type knife gate valve with handwheel and enclosed bonnet
Body Material: Stainless Steel SS304 or SS316
Gate Material: SS304 / SS316 (optional hard-faced or polished finish)
Stem: Stainless steel rising stem (non-rising available)
Bonnet: Sealed bonnet prevents dust and slurry ingress
Seat Options: Metal, EPDM, NBR, or PTFE for tight sealing
Size Range: DN50 to DN600 (2” – 24”)
End Connection: Wafer design for ANSI / DIN / JIS flanges
Flow Direction: Unidirectional or bidirectional (on request)
Technical Specifications
| Specification | Value |
|---|---|
| Valve Size | DN50 – DN600 (2″ – 24″) |
| Pressure Rating | PN10 / PN16 / ANSI 150 |
| Temperature Range | -10°C to 200°C (seal dependent) |
| Leakage Class | Class VI / Zero leakage (MSS-SP-81) |
| Face-to-Face | MSS-SP-81 or manufacturer std. |
| Operation | Manual Handwheel (Gearbox optional) |
Design Advantages
✅ Corrosion-Resistant All Stainless Steel Construction
✅ Wafer Type Saves Installation Space and Weight
✅ Bonneted Design Protects Stem from Dust, Slurry, and Moisture
✅ Smooth Gate Travel for Slurry or Fibrous Media
✅ Optional Flushing Ports for Self-Cleaning Operation
✅ Low Maintenance, Long Service Life
Applications
Water and Wastewater Treatment – Sludge, sediment, chemical feed lines
Pulp and Paper – Pulp stock, wood chip slurry
Food and Beverage – Sanitary or semi-viscous fluids (with polished gate)
Mining and Minerals – Light-duty slurry or process water
Chemical Plants – Acids, alkalis, and clean corrosive liquids
Textile and Dyeing – Fiber-laden or high-temperature liquids
Optional Configurations
Position Indicator on stem
Gearbox for Large Sizes or Higher Torque
Purge Ports on bonnet or seat area
Customized Flange Drilling (ANSI/DIN/JIS)
Stem Cover / Locking Device available
Quality & Testing
All valves undergo:
100% hydrostatic pressure test
Shell and seat leakage testing
Dimensional check per EN/ISO
Material certification available (EN 10204 3.1)
Certified under ISO 9001, CE, and other international standards.
Why Choose This Valve?
🔩 Reliable Manual Control – ideal where automation is not needed
🏭 Stainless Steel Durability – resists corrosion and wear in harsh environments
💧 Leak-Proof Bonneted Design – protects stem and prolongs service life
📏 Flexible Mounting – wafer ends fit various flange standards
💰 Cost-Effective – low lifetime maintenance cost
