Hanrui Puzer Company is a high-tech enterprise specialising in powder and bulk solids handling & conveying systems, dedicated to providing innovative material processing solutions for global industrial clients. Integrating R&D, manufacturing, and engineering services, our products are widely applied across industries including chemical, food, pharmaceutical, building materials, and new energy. The working principle of a direct blow rotary valve mainly involves using the valve’s structure to control the flow of air in and out. Here’s a basic overview:
1. Hanrui Puzer’s Rotary Valve Structure:
A rotary valve typically consists of a valve body and a rotating disc. The disc rotates within the valve body, altering the relative position between the disc and the body to regulate the airflow. A precision-engineered rotary valve comprises a robust valve housing (typically cast iron or stainless steel construction) and a dynamically balanced rotating disc assembly. The disc features precisely machined vanes that rotate within the tolerance-controlled valve chamber, creating multiple isolated compartments. High-performance bearings and shaft seals ensure smooth rotation while maintaining airtight integrity. The relative positioning between the disc’s radial vanes and the valve body’s inlet/outlet ports determines the material throughput capacity, with industrial-grade models offering flow rates from 0.5 to 300 m³/h depending on vane configuration and rotational speed (typically 15-45 RPM).
2. Direct Blow Design:
The direct blow type is designed with a straight airflow path, minimizing resistance and improving flow rate and efficiency. The optimized direct blow configuration employs a streamlined, low-angle airflow path that reduces turbulent flow by up to 70% compared to conventional designs. Specialized internal geometries including venturi-shaped transitions and polished surface finishes (Ra ≤ 0.8μm) minimize pressure drop across the valve. This design achieves exceptional flow efficiencies of 92-97%, with particular advantages for handling abrasive materials like silica sand or fragile products such as plastic pellets. The straight-through architecture also simplifies maintenance access and allows for inline inspection without full disassembly.
3. Airflow Control:
When the disc rotates to a specific position, the inlet and outlet ports of the valve body align, allowing air to flow in or out. Conversely, when the disc rotates to another position, the airflow path closes, stopping the flow. During operation, the synchronized rotation of the disc’s chambers creates precise timing sequences for material discharge. When the vane chamber aligns with the inlet port (typically at 30° rotation intervals), it creates an optimal pressure differential for material intake. Full alignment at 90° provides maximum flow capacity, while subsequent rotation to 180° initiates controlled discharge. Advanced models incorporate real-time position feedback via rotary encoders (0.1° resolution) and can be integrated with PID control loops to maintain airflow velocities within ±2% of setpoints. The instantaneous shut-off capability achieves complete flow termination within 0.5 seconds when the vanes rotate past the outlet port.
4. Applications:
This type of valve is commonly used in pneumatic conveying, packaging, and automated production lines, enabling quick and effective control of gas flow.
Rotary valves of this type are characterized by their simple structure, ease of operation, and precise flow control.
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In pneumatic conveying systems, they maintain airlock integrity while handling materials from fine powders (50μm) to large pellets (25mm)
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Packaging lines utilize their precision dosing capabilities for fill weights accurate to ±0.5%
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Automated production systems leverage their rapid response times (cycle rates up to 60/min) for batch processing
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Specialized variants feature FDA-compliant materials for food processing or ATEX-rated components for explosive environments
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Recent smart valve iterations incorporate IoT connectivity for predictive maintenance and remote flow monitoring
Hanrui Puzer Bulk Handling Technology (Shanghai) Co.,ltd,as a leading high-tech enterprise specializing in powder and particle solid material handling engineering.
