Manual Handwheel PU Lined Flanged Knife Gate Valve
Dependable Isolation and Ultimate Abrasion Resistance
The Manual Handwheel PU Lined Flanged Knife Gate Valve is the robust, manual isolation solution for systems handling highly abrasive, high-solids slurries and solids where cost-effective reliability is paramount. It is specifically designed for processes like mining residue discharge, coal slurry handling, and industrial wastewater treatment.
The defining feature is the full-bore design with an integral Polyurethane (PU) lining on all media flow parts, providing superior, long-lasting resistance to wear and erosion. This ensures a guaranteed Zero Leakage seal. Operated by a Manual Handwheel, this valve offers a low-cost, high-reliability option for absolute shut-off, without requiring external power or air supply, while significantly extending service life in the harshest applications.
Key Features & Performance Advantages
| Feature Category | Technical Detail | Core Operational Benefit |
| Abrasion Resistance | Full PU Lining on Media Contact Parts | All wetted parts are integrally lined with Polyurethane, providing exceptional resistance to abrasion and ensuring a long service life. |
| Sealing Security | Zero Leakage & Full Port | Achieves absolute zero leakage for both sealing and packing (via integral molded rubber packing), with a full-bore design to minimize pressure drop and turbulence. |
| Maintenance Cost | Replaceable PU Liner and SS Gate | The integral PU valve liner and Stainless Steel gate are replaceable, significantly reducing long-term maintenance costs and maximizing uptime. |
| Operation Safety | Manual Handwheel | Provides reliable, low-cost operation for intermittent shut-off or flow regulation where external power is unavailable or unnecessary. |
| Pressure Handling | Higher Pressure Rating | Rated up to 2.5MPa (25 Bar) for smaller sizes, making it suitable for moderate-to-high pressure slurry lines compared to low-pressure rubber-seated models. |
| Application Range | Diverse Industry Use | Widely used in mining residue discharge, power generation, papermaking, and municipal sewage treatment. |
Technical Specifications (PU Lined Flanged Model)
| Parameter | Specification | Notes |
| Nominal Size (DN) | DN 50 – 600 (2″ to 24″) | Standard manufacturing range. |
| Applicable Temperature | -20℃～+100℃ | Suitable for general industrial temperature ranges. |
| Leakage Class | Zero Leakage | Bubble-tight shutoff guaranteed. |
| Actuation | Manual Chainwheel | Used for high-reach applications (typically above $1.7text{m}$). |
| Flange Type | Flanged Connection (Flange Standardized) | Ensures robust installation in piping systems. |
Pressure Ratings (MPa / Bar)
| Nominal Size Range | Pressure Rating (MPa) | Equivalent Bar Rating |
| DN 50 – 250 | 1.0MPa – 2.5MPa | 10Bar – 25Bar (and ASME Class 150) |
| DN 300 – 400 | 0.6MPa – 1.0MPa | 6Bar – 10Bar |
| DN 500 – 600 | 0.4MPa – 0.6MPa | 4Bar – 6Bar |
Major Component Materials
| Component | Material |
| Body | Cast Iron, Cast Steel, Stainless Steel + Polyurethane Lining |
| Gate | Stainless Steel |
| Stem | Stainless Iron, Stainless Steel |
| Seat | Polyurethane (PU) |
Operation Guidance and Customization
- High-Lift Operation: For installations where the operating handwheel is high above the platform (typically above $1.7\text{m}$), a Chainwheel operator is recommended for safety and accessibility.
- Custom Materials: The body material (Cast Iron, Cast Steel, Stainless Steel) can be chosen based on external corrosion risks.
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