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Bean Cleaning Line
HZXZ Coffee Grader
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The HZXZ Series Rotary Coffee Grader is a precision size classification machine for coffee beans and other grains after hulling and polishing. It features a multi-layer screen configuration with up to four layers, enabling separation into multiple size grades in a single pass. All screens are drawer-type for quick, tool-free changes. Screen combinations are customizable to client specifications for different coffee varieties and market standards.
Available in models with capacities from 15 to 20 t/h, optimized rotational speed (320 r/min), and generous screen areas up to 5 m². Durable construction ensures long service life. Ideal for specialty coffee producers requiring precise grade separation as well as large commercial operations needing high-throughput sorting for consistent roasting and premium pricing.
Key Features
Multi-Layer Screen With Drawer-Type System for Precision Grading
The Rotary Coffee Grader features a multi-layer screen configuration (up to four layers) enabling simultaneous separation into multiple size grades in one pass. Drawer-type screens slide out for quick, tool-free changes, reducing downtime when switching coffee varieties or performing cleaning. This design streamlines processing lines while ensuring accurate size definition for consistent roasting.
Customizable Screen Combinations and Multiple Model Options
Screen perforations are fully customizable across three or four layers to match specific coffee varieties, market requirements, or grade standards. Multiple models (HZXZ200×250 and HZXZ150×250) offer capacities from 15 to 20 t/h with screen areas up to 5 m². This coffee grading machine adapts to both specialty and commercial operations, enabling scalable solutions.
Optimized Rotational Speed and Generous Screen Area for High Efficiency
Operating at an optimized 320 r/min, the machine gently tumbles beans for thorough separation without damage. Generous screen area (up to 5 m²) allows even material spread, preventing thick beds that impede grading. Achieves 15–20 t/h throughput with high efficiency, reducing re-screening and product loss while supporting premium market positioning.
Durable Construction Designed for Long Service Life
Built with heavy-duty components to withstand continuous operation, this size classification machine maintains alignment and performance over years of use. Sealed bearings and wear-resistant screen frames minimize maintenance and unplanned downtime. Durable construction translates to lower total cost of ownership, making it a long-term investment for coffee processing facilities.
Food-Grade Construction With Sanitary Design Features
All product-contact surfaces use food-grade materials, with drawer-type screens enabling thorough cleaning between runs. The design minimizes crevices and dead spaces, preventing contamination and supporting food safety audits. Corrosion-resistant construction withstands coffee acids and cleaning agents, ensuring hygienic condition throughout the grading equipment’s service life.
Versatile Application Across Coffee Varieties and Processing Methods
Handles Arabica and Robusta, as well as washed, natural, and honey-processed coffees. Adjustable screen combinations allow quick reconfiguration for different origins or grade specifications. The Rotary Coffee Grader also serves grain processing, seed cleaning, and specialty crop sizing, providing operational flexibility for facilities with diverse product streams.
Technical Specifications
| Model | HZXZ200*250 | HZXZ200*250 | HZXZ150*250 | HZXZ150*250 |
| Data | Three screen | Four screen | Three screen | Four screen |
| Capacity (t/h) | 20 | 20 | 15 | 15 |
| Screen area(m2) | 5 | 5 | 3.75 | 3.75 |
| Speed (r/min) | 320 | |||
| Power (kw) | 4 | 4 | 3 | 3 |
| Weight (kg) | 3100 | 3350 | 2950 | 3150 |
| Size (L*W*H) | 2988*2750*2105 | 2988*2750*2105 | 2988*2250*2105 | 2988*2250*2105 |
FAQ
What is a coffee grader used for?
A coffee grader sorts coffee beans by size into uniform grades, essential for consistent roasting, quality control, and achieving premium pricing in specialty coffee markets.
How does the HZXZ rotary coffee grader work?
Coffee beans are fed onto rotating multi-layer screens; beans smaller than screen openings fall through to designated collection points, while larger beans progress to subsequent screens for further classification.
How many screen layers does the HZXZ grader have?
The HZXZ series is available in both 3-layer and 4-layer screen configurations, allowing separation into up to five size grades in a single pass.
What is the capacity of the HZXZ coffee grader?
Capacities range from 15 to 20 tons per hour depending on model and screen configuration, suitable for commercial coffee processing operations.
How are screens changed on the HZXZ grader?
Screens are drawer-type design—each layer slides out from the machine housing on precision tracks, allowing quick and convenient screen changes without tools or disassembly.
Can screen combinations be customized?
Yes. Screen perforations can be specified in any combination across the screen layers to meet specific grade requirements for different coffee varieties and market specifications.
What is the rotational speed of the grader?
The HZXZ series operates at 320 r/min, optimized to balance high throughput with accurate size separation while minimizing bean damage.
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