Pneumatic Square/Rectangular Knife Gate Valve
Automated, Rapid Isolation for Bulk Solids
The Pneumatic Square/Rectangular Knife Gate Valve is engineered for automated, rapid-response isolation and flow control in systems handling dry bulk materials, powders, granules, and lump solids.
It uniquely features a Square/Rectangular Port optimized for seamless integration with non-circular hoppers, chutes, and conveyor discharge points. Driven by a fast and reliable Pneumatic Cylinder, this valve ensures the gate cycles quickly and with sufficient thrust to cut through settled or dense material columns, preventing production delays. It is the automated, heavy-duty solution for processes across mining, cement, grain, and chemical industries.
Key Features & Automation Advantages
| Feature Category | Technical Detail | Core Operational Benefit |
| Operation Type | Pneumatic Cylinder Actuation | Provides rapid, reliable on/off cycling, ideal for automated batch processes and fast emergency shut-off sequences. |
| Flow Geometry | Square/Rectangular Port | Optimized for bulk solids, eliminating the material bridging and jamming issues commonly faced when connecting round valves to square outlets. |
| Material Handling | High Thrust Capability | The cylinder provides strong force to ensure the gate cuts through dense powder or fine granules and closes reliably. |
| Design | Non-Jamming Structure | Simple, flexible structure designed to avoid material consolidation, handling lumps up to $50\text{mm}$. |
| System Integration | Ready for PLC/DCS | The actuator is easily outfitted with solenoid valves, limit switches, and positioners for seamless integration into automated control systems. |
| Safety Indication | Rising Stem Design | The stem’s vertical movement offers clear visual confirmation of the valve’s open or closed status. |
Technical Specifications & Standard Reference
| Classification | Parameter | Standard Specification / Notes |
| Actuation | Type | Pneumatic Cylinder (Standard Double-Acting) |
| Supply Pressure | Typically 0.4 – 0.7 MPa (60 – 100 PSI) Clean Air | |
| Design | Body Type | Square/Rectangular Port, Bonnetless Design (Standard) |
| Sealing | Metal Seated or PTFE/Polymer Seal (Optimized for dry powders/granules) | |
| Flow Type | Uni-Directional (Single-Way) or Bi-Directional (Two-Way) | |
| Connection | Type | Flanged or Lugged (Custom bolt patterns available) |
| Standard Size Range | DN $150 \times 150$ up to DN $1200 \times 1200$ (Custom Sizes Available) | |
| Materials | Body Material | Cast Iron (CI), Ductile Iron (DI), or Carbon Steel (CS) |
| Gate Material | SS304 or CS (suitable for bulk solids) | |
| Performance | Operating Pressure | Low Pressure (Typically atmospheric or minor head pressure) |
| Service Media | Powders, Granules, Ash, Cement, Pellets, Mineral Concentrates, Grains. |
Customization and Options
- High Temperature/Abrasive Resistance: Hardened gate materials or specialized sealing systems are available for abrasive materials like fly ash or high-temperature processes.
- Actuator Options: Options include fail-safe air-to-open or air-to-close configurations, as well as magnetic limit switches for enhanced position feedback.
- Custom Manufacturing: This valve can be manufactured according to user-specific designs and dimensions to perfectly match existing chute outlets.
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