Chainwheel PU Lined Flanged Knife Gate Valve
Superior Abrasion Resistance and Safe, High-Reach Operation
The Chainwheel PU Lined Flanged Knife Gate Valve is the heavy-duty, manual isolation solution engineered for systems handling extremely abrasive, high-velocity slurries and solids, such as those found in mining, power generation, and wastewater treatment.
The core advantage is its full-bore design, where all media flow parts are integrally lined with Polyurethane (PU). This provides superior wear resistance and extended service life. Combined with a Chainwheel Operator, this valve offers a zero-leakage seal and allows personnel to safely operate high-mounted valves from ground level, eliminating the need for elevated platforms。
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 | Chainwheel Actuation | Allows for safe, convenient operation from the ground level, essential for valves installed high above platforms. |
| 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 $1.7\text{m}$). |
| 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
- Safety Operation: The Chainwheel allows for safe manual operation from the ground level or a safe platform.
- Actuator Pairing: For larger sizes, the Chainwheel is often paired with a Bevel Gear to ensure the necessary mechanical advantage for smooth, low-effort stroking.
- Custom Manufacturing: This valve can be manufactured to user-specific designs and dimensions to match your piping system.
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