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Product Overview The Gravimetric Feeder series represents the pinnacle of precision dosing technology, integrating real-time weight measurement with closed-loop control for critical material handling applications. Compliant with GB 3836.1-2010 (Explosive Atmospheres) and GB/T 7721-2017 (Automatic Gravimetric Filling Instruments), this equipment delivers ±0.25% dosing accuracy in pharmaceutical, chemical, and food processing industries. Available in explosion-proof and hermetic configurations, it ensures safe operation in ATEX Zone 21/22 environments and GMP-regulated cleanrooms.

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Key Technical Parameters

1. General Specifications
   • Application: Metering powders, pellets, and flakes (bulk density 0.2–2.5 T/m³) with hygroscopic or electrostatic properties.
   • Capacity Range: 0.1 kg/h–50 T/h (multi-range load cells).
   • Dosing Accuracy:
     • Static: ±0.1% of setpoint.
     • Dynamic: ±0.25% under load fluctuations.
   • Positioning: Premium solution for FDA/GMP-compliant production lines.
2. Weighing System
   • Load Cell:
     • Type: Monolithic shear beam (OIML R60 Class 0.02).
     • Sampling Rate: 1,000 Hz (anti-vibration filtering).
   • Control Algorithm: Adaptive PID with neural network tuning.
3. Drive & Feed Mechanism
   • Screw/Belt Options:
     • Screw: Twin- or single-screw (1–300 mm diameter).
     • Belt: FDA-grade PU belts (200–1,500 mm width).
   • Motor System:
     • Power: 0.25–30 kW (IE5 SynRM motors, GB 18613-2020).
     • Speed Control: 0.01–100% stepless adjustment via VFD.
4. Safety & Containment
   • Explosion Proof:
     • Standard: Ex d IIC T4 Gb (GB 3836.1-2010).
     • Options: Ex tD IIIB T130°C for combustible dusts.
   • Hermetic Design:
     • Sealing: Double mechanical seals + gas purge (leakage <1 ppm).
     • Pressure Rating: -0.095 MPa to +0.7 MPa.
5. Structural Components
   • Frame: SS316L (GB/T 3280-2015) with electropolished finish (Ra ≤0.4 µm).
   • Contact Surfaces:
     • Coatings: FDA-compliant PTFE or ceramic (GB 4806.1-2016).
   • Enclosure Rating: IP66/IP69K (GB/T 4208-2017).

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Design Innovations

• Self-Calibration: Automatic span adjustment via built-in test weights.
• Material Bridge Breaker: Ultrasonic/VFD-controlled agitators.
• Quick-Change System: Tool-free disassembly for <10-minute CIP cycles.
• Smart Diagnostics: AI-powered wear prediction for screws/belts.

Typical Applications

• API ingredient dosing in tablet compression.
• Flame retardant addition in polymer extrusion.
• Seasoning application in snack food production.

Product Positioning Positioned as the gold standard for regulated industries, this series exceeds pharmacopeia requirements (USP <1058>) while maintaining GB compliance. It serves as the core component of Industry 4.0-ready smart factories.

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Compliance & Standards

• Weighing Accuracy: GB/T 7721-2017 Class 0.5.
• Hygienic Design: GB 4806.1-2016 + EHEDG EL Class I.
• Electrical Safety: GB 5226.1-2019 (PLd safety level).

Optional Features

• Nitrogen inertization system (O₂ <1%).
• X-ray detectable belt/screw variants.
• 21 CFR Part 11-compliant software.
• Infrared moisture compensation system.

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Operational Advantages

• 40% Energy Savings: Regenerative drives recover braking energy.
• Zero Downtime: Hot-swappable load cells and drives.
• Universal Connectivity: OPC UA, MQTT, and PROFINET protocols.