Electric PU Lined Flanged Knife Gate Valve
Automated Precision and Ultimate Abrasion Resistance
The Electric PU Lined Flanged Knife Gate Valve is the advanced isolation and flow control solution designed for systems handling extremely abrasive, high-velocity slurries and bulk solids in automated processes. It excels in demanding environments like mining residue discharge, power generation, and paper mills.
The valve’s primary strength is its integral Polyurethane (PU) lining on all media flow parts, which provides superior wear resistance and an extended service life. Coupled with a high-torque Electric Actuator, this valve delivers consistent, high-thrust shut-off against dense slurries and enables precise remote control and modulation (throttling), offering unmatched reliability and process accuracy.
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 | Electric Actuator | Provides consistent, high-thrust and precise positional control, making it ideal for accurate flow modulation and reliable shut-off. |
| 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
- 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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