On December 17, 2025, the Graf 900 pellet mill large ring die was successfully shipped
On December 17, 2025, the large ring die for the Graf 900 pellet mill, manufactured by Jaray, successfully completed production testing and was officially loaded and shipped to the customer’s site. This batch of high-precision ring dies will be used in Graf series equipment from the internationally renowned pellet mill brand, providing core component support for the customer’s high-capacity wood pellet production line, marking another new achievement for Jaray in the field of high-end pellet mill component manufacturing.
I. Precision Manufacturing – Providing a Powerful Core for High-Capacity Pellet Lines
As a core component of the entire production line, the quality of the Graf 900 pellet mill large ring die directly determines the pellet forming rate and equipment stability. The ring die shipped this time has a diameter of 900 mm, weighs approximately 230 kg, and is made of imported alloy steel, manufactured through CNC precision machining and vacuum heat treatment processes.
The product boasts the following significant advantages:
High wear resistance: Surface hardness reaches HRC58-60, extending service life by 40% compared to ordinary ring dies.
High bore diameter precision: Utilizing CNC drilling technology, the error is controlled within ±0.02mm.
High versatility: Fully compatible with Graf series pellet mill models and various biomass raw materials.
The ring dies shipped this time will be installed in the customer’s wood pellet plant in Southeast Asia for use in an automated production line with an annual capacity of 100,000 tons. It is expected that after being put into operation, it will significantly improve pellet forming efficiency and energy efficiency.
II. From Materials to Finished Products – Meticulous Attention to Detail at Every Step
To ensure the consistent quality of the ring dies, Jaray strictly adheres to the ISO9001 quality management system standard, and the ring die production process involves more than 20 steps.
The main process flow includes:
Production Stage Process Description
Material Selection——High-chromium alloy steel and stainless steel composite material is selected to improve corrosion resistance and toughness.
Heat Treatment——Vacuum carburizing and cryogenic treatment technologies are used to ensure uniform hardness.
Precision Drilling——German-imported CNC multi-hole drilling machines are used to ensure hole diameter accuracy.
Surface Grinding—— Multiple grinding and polishing processes reduce the coefficient of friction.
Finished Product—— Inspection Microstructural analysis and dynamic balance testing are conducted.
Before leaving the factory, each ring die undergoes simulated load testing to ensure stable operation, uniform forming, and meets export standards.
III. Quality Wins Trust, Service Supports Global Success
Since its establishment, Jaray has always adhered to the development philosophy of “Quality First, Global Service.” With years of production experience and stable product performance, the company’s ring dies, roller shells, spindles, and other pellet mill accessories have been exported to Germany, the United States, India, Vietnam, Malaysia, Pakistan, Russia, and many other countries.
The successful shipment of the Graf 900 model ring die marks another breakthrough for the company in the field of high-end customized ring die production. Customer feedback after sample trial operation:
“Jaray’s ring die has high precision, smooth discharge, and stable pellet density, fully meeting or even exceeding the original equipment manufacturer’s (OEM) standards.”
The company’s technical service team also provided installation guidance, parameter debugging, and maintenance advice to ensure the equipment quickly enters a high-efficiency production state.
IV. Technological Innovation Drives Manufacturing Upgrades
To meet the high standards of the international market, Jaray has continuously increased its R&D investment in recent years, introducing multiple five-axis machining centers, automatic drilling and inspection systems, and automatic heat treatment furnaces, achieving intelligent and standardized ring die production.
V. Win-Win Cooperation – Contributing to Global Biomass Energy Development
With the growing global demand for renewable energy, biomass pellets such as wood chips, rice husks, and straw are becoming an important part of clean energy. Jaray actively responds to the national “Belt and Road” initiative, continuously providing overseas customers with high-quality pellet mill parts and complete solutions.
“The shipment of the Graf 900 model ring die is not just a product delivery, but also a symbol of Chinese manufacturing moving towards high-end and international standards. We will continue to be driven by innovation, providing more high-quality and highly stable pellet mill parts, contributing Chinese strength to the global development of green energy.”
The successful shipment of the Graf 900 model pellet mill ring die demonstrates Jaray’s strength and responsibility in precision manufacturing and international cooperation. In the future, the company will continue to uphold the philosophy of “precision manufacturing and quality first,” promoting Chinese ring die brands to the world stage and contributing to the sustainable development of the global biomass energy industry.
