Pneumatic Resilient-Seated Slurry Knife Gate Valve
Automated, Zero-Leakage Isolation for Abrasive Service
The Pneumatic Resilient-Seated Slurry Knife Gate Valve is the ideal choice for automated, rapid-cycle isolation in lines carrying highly abrasive and erosive media such as mining slurries, coal ash, mud, and raw sewage.
This valve’s primary feature is its Special Rubber Seat and liner, which guarantees a secure Zero Leakage seal when fully closed. The fast-acting Pneumatic Cylinder provides the necessary speed and thrust to quickly drive the gate through dense, high-solids content fluids, making it perfect for batching, emergency shut-off, and frequent cycling applications. Its robust design, including the replaceable seat and stainless steel gate, ensures long service life and minimal downtime in aggressive environments.
Key Features & Automation Advantages
| Feature Category | Technical Detail | Core Operational Benefit |
| Operation Type | Pneumatic Cylinder Actuation | Provides rapid, reliable on/off cycling, essential for automated systems and fast emergency shut-off sequences. |
| Sealing Security | Zero Leakage (Tight Shut-off) | Guarantees absolute isolation against the flow of heavy slurries, preventing contamination and ensuring process integrity. |
| Wear Resistance | Special Replaceable Rubber Seat/Liner | Features an embedded reinforcement ring for superior abrasion resistance and extended life, significantly outlasting standard metal-seated valves in slurry service. |
| Maintenance Cost | Field-Replaceable Components | The seat and stainless steel gate can be easily replaced, drastically reducing long-term repair costs and maximizing uptime. |
| System Integration | Ready for PLC/DCS | Easily integrates with solenoid valves and limit switches for remote control and seamless automation within the plant’s control system. |
| Low-Pressure Design | Pressure Rating 0.25MPa | Optimized for handling low-pressure, high-solid-content fluids, common in mineral processing and wastewater treatment. |
Technical Specifications (Standard Resilient-Seated Model)
| Parameter | Specification | Notes |
| Nominal Size (DN) | DN 50 – 600 | Sizes up to 48″ also available. |
| Pressure Rating | 0.25MPa2.5 Bar / ASME Class 150 (Low Pressure) | Optimized for low-pressure, high-solid-content applications. |
| Applicable Temperature | -10℃～+120℃ | Suitable for most industrial slurry process temperatures. |
| Leakage Class | Zero Leakage (when gate is fully open or fully closed) | Bidirectional sealing performance. |
| Actuation Type | Pneumatic | Available in Pneumatic, Electric, and Manual options upon request. |
Customization and Options
- Fail-Safe Configuration: The actuator can be configured for fail-safe open or fail-safe closed operation upon loss of air pressure.
- Position Feedback: Inductive or magnetic limit switches provide precise, real-time position signals to the control system.
- Custom Materials: While Stainless Steel is standard for the gate, special high-hardness coatings are available for extremely aggressive, high-velocity slurries.
Target Industry Applications
- Mining & Mineral Processing: Isolation of mineral slurries, tailings, and dense ore media.
- Wastewater Treatment: Reliable shut-off for raw sewage, high-solids sludge, and process lines.
- Power Plants: Handling of coal slurry and ash slurry.
- Pulp & Paper: Isolation of thick stock and fibrous process media.
- Construction: Control of mortar, cement slurry, and industrial mud.
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