Premium Gourmet & Nutraceutical Oil
Walnut oil is a premium edible oil valued for its delicate nutty flavor, high omega-3 ALA content (12-14%), and antioxidant properties. Global annual production exceeds 60,000 metric tons, serving gourmet food, cosmetics, and nutraceutical markets with premium pricing.
Huatai's walnut oil production lines deliver complete EPC solutions covering every stage — from walnut shelling and kernel separation, through cold pressing or solvent extraction, to light refining and nitrogen-flush packaging. Because walnuts are high-value, gentle handling and low-temperature processing are critical to preserve flavor and nutritional value.
We offer flexible capacities from 5 TPD to 200 TPD. Each line is custom-engineered based on your walnut variety, target oil grade (virgin cold-pressed or refined), and target market (gourmet food, cosmetics, or supplements). Cold pressing preserves the premium positioning.
Walnut Oil Production Steps
From raw walnut oil to refined oil — a fully integrated process.
1. Cleaning
Raw walnuts pass through magnetic separators and vibrating screens to remove foreign materials — shells, stems, dust, and metal fragments.
2. Shelling
Walnuts are cracked using impact or roller crackers to break shells without damaging kernels. Shell fragments are separated by air classification and shaker tables.
3. Kernel Separation
Shelled walnut kernels are graded by size and quality. Premium whole kernels are sold directly; broken pieces and rejects are processed for oil extraction.
4. Conditioning
Walnut pieces are conditioned to 40-50°C for cold pressing, or 60-70°C for hot pressing. Low temperature preserves delicate flavor and omega-3 content.
5. Cold Pressing
Conditioned kernels are pressed in a low-temperature screw press to extract premium virgin walnut oil. Cold pressing (below 60°C) preserves flavor and nutritional value.
6. Optional Solvent Extraction
Walnut cake from pressing contains 8-12% residual oil. For full recovery, cake can be solvent-extracted with hexane, producing industrial-grade walnut oil for non-food applications.
7. Filtration
Cold-pressed walnut oil is filtered through plate-and-frame filters or vertical leaf filters to remove fine particles, producing clear premium oil.
8. Light Refining (Optional)
For extended shelf life, walnut oil can be lightly refined through cold degumming and mild bleaching. Full deodorization is avoided to preserve nutty flavor.
9. Nitrogen Packaging
Filtered walnut oil is packaged in dark glass bottles with nitrogen flush to prevent oxidation. Cold storage extends shelf life of this premium oil.
Key Equipment Systems
Each system is designed and manufactured in-house under ISO 9001 quality management.
Shelling & Separation
Walnut cracker (impact or roller type), air classifier, and shaker table for shell-kernel separation with minimal kernel damage. Premium whole kernels are sorted separately.
Cold Pressing
Low-temperature screw press with cooling jacket and controlled temperature below 60°C, preserving flavor and omega-3 content for premium virgin walnut oil.
Filtration System
Plate-and-frame filter or vertical leaf filter for fine particle removal, producing clear premium walnut oil ready for packaging.
Light Refining
Optional cold degumming and mild bleaching for extended shelf life. Full deodorization avoided to preserve natural nutty flavor characteristic of premium walnut oil.
Nitrogen Packaging
Nitrogen-flush packaging in dark glass bottles prevents oxidation of omega-3 fatty acids, extending shelf life of premium walnut oil to 18+ months.
Technical Highlights
Engineering innovations that deliver superior performance and lower operating costs.
Cold-Press Premium Oil Production
Our low-temperature screw press with cooling jacket produces cold-pressed virgin walnut oil below 60°C, preserving delicate flavor and omega-3 content for premium gourmet and nutraceutical markets.
Premium Kernel Sorting Integration
Integrated shelling and grading system separates premium whole kernels (sold directly) from broken pieces (processed for oil), maximizing overall walnut value recovery.
Oxidation Protection System
Nitrogen-flush processing and dark-glass packaging prevent omega-3 oxidation throughout production, delivering shelf-stable premium walnut oil commanding 3-5x conventional oil prices.
China's Leading Grain & Oil Machinery Manufacturer
Henan Huatai Intelligent Equipment Group was founded in 1988 and has grown into one of China's major grain and oil machinery manufacturing enterprises. We integrate research and development, engineering design, equipment manufacturing, on-site installation and commissioning under one roof.
Our 100,000㎡ manufacturing campus in Hua County, Henan Province houses modern production lines with CNC machining centers, automated welding systems and comprehensive quality testing laboratories. As an ISO 9001 certified manufacturer, every piece of equipment undergoes rigorous inspection and factory acceptance testing before shipment.
We specialize in complete EPC turn-key projects covering the full spectrum of edible oil processing — from oilseed pretreatment and solvent extraction through to refining, fractionation and by-product utilization.
38+
Years of Experience
100,000 m²
Modern Factory
70+
Countries Served
22
Global Offices
Get Your Customized Walnut Oil Plant Solution
Tell us your walnut variety and target oil grade (cold-pressed virgin or refined). Our engineers will prepare a tailored proposal within 48 hours.