Hydraulic Oil Press
Cold Press Hydraulic Oil Press
Model: HN426
1-Year Warranty • Lifetime Technical Support
Specifications
Model (Single/Double) HN426 Simple / HN426 Double
System Pressure 70 Mpa
Pressing Force 500 Tonnes
Motor Power 2.2 KW
Machine Weight (Single/Double) 2,4 / 2,7 Tonnes
Cylinder Outer Diameter 426 mm
Piston Inner Diameter 320 mm
Barrel Standard Inner Diameter 390 mm (customizable)
Barrel Standard Height 800 mm (customizable)
Cylinder Standard Stroke 850 mm (customizable)
Overall Dimensions (Single/Double) 1200×1200×2750 / 2100×1200×2750 mm
Cake Surface Pressure 42 Mpa/cm²
Recommended Oil Seeds
These seeds are particularly recommended for this machine model. However, it can also process most other oil seeds with excellent results. Contact us if you have questions about a specific seed.
tea seed rapeseed peanut soybean flaxseed lacquer oil seed walnut kernel in-shell walnut apricot kernel yellowhorn tiger nut + more oil seeds available
Description
Overview
The HN426 Cold Press Hydraulic Oil Press is our dedicated cold pressing specialist, engineered to extract oil from delicate and hard-shell materials without heat degradation. With a 500-ton pressing force and 42 Mpa/cm² cake surface pressure, it delivers the power needed to cold press walnut kernels, in-shell walnuts, apricot kernels, yellowhorn, tiger nuts, and similar challenging materials — all fully extracted in a single cycle.
Built on a 3 cm thick steel plate frame, the HN426 combines structural robustness with precision hydraulic control. Cold pressing preserves the natural flavor, aroma, and nutritional value of your oil, commanding premium prices in the market. If you are producing high-value cold-pressed oils, this machine is designed to maximize both your oil yield and your profit margin.
Key Advantages
- True Cold Press Capability — 42 Mpa/cm² cake surface pressure extracts oil from hard-shell and delicate materials without heating, preserving premium oil quality.
- 500-Ton Pressing Force — Substantial power to handle the toughest cold-press materials, including in-shell walnuts and apricot kernels, in a single cycle.
- Single-Cycle Extraction — Cold-press materials are fully pressed in one cycle, eliminating the need for re-pressing and saving time and energy.
- Premium Oil Quality — Cold pressing retains natural antioxidants, vitamins, and flavor compounds, allowing you to sell at premium market prices.
- Heavy-Duty Frame — 3 cm thick steel plate construction ensures stability and longevity under the high pressures required for cold pressing.
- Dual-Barrel Productivity — Double-barrel configuration with dual sliding rails enables continuous operation — load one barrel while the other presses.
Core Technology
- Bar-Type Slotted Barrel — Haonuo’s proprietary slotted barrel design provides significantly more oil extraction area than traditional drilled barrels. Oil flows faster and clearer, with approximately 2-3% higher yield (based on internal testing, results vary) — critical for cold-press applications where every percentage point counts. No clogging, no cleaning between batches.
- German Hydraulic System — Ultra-high pressure combined hydraulic pump station with high-low dual pump. Working pressure up to 70 Mpa with rapid cylinder return, delivering the sustained high pressure cold-press materials demand.
- 4-Hook Cake Removal — Innovative 4-hook mechanism ensures easy, reliable cake discharge — even after overnight pressing of hard-shell materials.
- High Carbon Steel Frame — High-frequency quenched and heat-treated steel for long-lasting service under 500-ton pressing force. Actual service life depends on operating conditions and maintenance.
- Microcomputer Control — Automated pressing cycle from loading to finished oil in minutes.
- Energy Efficient — Designed to reduce power consumption compared to previous-generation presses (actual savings vary by operating conditions).
- Labor Efficient — Only 1-2 operators needed, reducing labor requirements compared to manual pressing methods.
Applications & Suitable Materials
Cold-Press Materials
- Walnut kernel, in-shell walnut, apricot kernel
- Yellowhorn (Xanthoceras sorbifolium), tiger nut (Cyperus esculentus)
Conventional Materials
- Tea seed, rapeseed, peanut, soybean, flaxseed, lacquer oil seed
The HN426 handles all of the above with excellent oil yield. For conventional materials, the high cake pressure may help reduce residual oil rates (results vary by material).
Why Choose Haonuo
- Factory-Direct Pricing — Get cold-press capability at manufacturer-direct prices. No middlemen, no inflated costs — just industrial-grade performance at a fair price.
- Cold-Press Expertise — We understand the unique demands of cold pressing and have optimized the HN426 specifically for these applications.
- Quality Assurance — Every machine is factory-tested under full load, including cold-press cycle verification, before shipment.
- After-Sales Support — Our technical team provides installation guidance, operational training, and ongoing troubleshooting to ensure you get the best results from day one.
- Customization Options — Barrel dimensions, stroke length, and other parameters can be tailored to your specific cold-press material requirements.
Regional Advantages
Southeast Asia (Indonesia, Malaysia, Thailand, Vietnam): The HN426 is the ideal cold press for premium VCO (Virgin Coconut Oil) production. Temperature stays below 50 degrees Celsius during pressing, preserving coconut oil’s natural lauric acid content and fresh coconut aroma.
Africa (Nigeria, Kenya, Ghana, Tanzania): While primarily a cold press, the HN426 also handles hot pressing for groundnut and sesame oil. Its versatile design makes it a great all-around machine for African oil producers who process multiple seed types.
Middle East (Saudi Arabia, UAE, Egypt): The HN426’s precise temperature control makes it well-suited for premium cold-pressed sesame oil production. Designed to meet food safety standards for Middle Eastern markets. Halal compliance depends on your local certification process.
Frequently Asked Questions
What is the oil yield of the HN426 hydraulic oil press?
The oil yield depends on the raw material. For example, sesame yields 42-54%, peanuts 40-50%, and rapeseed 35-45%. The HN426's 500-ton pressing force and bar-type slotted barrel design achieve approximately 2-3% higher yield (based on internal testing, results vary) than traditional drilled barrel presses.
What raw materials can the HN426 press?
The HN426 can press sesame, peanut, rapeseed, sunflower seed, flaxseed, tea seed, soybean, cottonseed, and more. It is especially designed for cold pressing hard-shell materials like walnut kernels, in-shell walnuts, and apricot kernels.
How long does one pressing cycle take?
Cold pressing requires longer cycle times to preserve oil quality at low temperatures. A typical cold pressing cycle takes approximately 2 hours per batch depending on the material and desired cake dryness. Hot pressing (with pre-roasting) completes in 30-40 minutes. The actual cycle time depends on factors like seed moisture content, desired cake dryness, and pressing temperature. The microcomputer control system automates the entire process from feeding to cake discharge.
What is the recommended raw material moisture content for cold pressing?
For cold pressing, the ideal moisture content range is 7-9%. This moisture level ensures smooth oil extraction while maintaining low-temperature conditions. Proper moisture control is critical — too high causes oil emulsification and yield loss, while too low increases friction and reduces throughput.
What pre-processing equipment is needed for cold pressing?
Cold pressing requires careful pre-processing steps including seed cleaning and color sorting to remove impurities, dehulling for high-shell-content materials with shell removal rate at least 95 percent, moisture conditioning to reach optimal 7-9 percent moisture, and gentle crushing to break seeds without generating heat below 60 degrees Celsius. Unlike hot pressing, cold pressing does not involve roasting, preserving natural nutrients and flavors.
What is the difference between single and double barrel configurations?
A single barrel press processes one batch at a time. A double barrel press has two barrels on sliding rails — while one barrel is pressing, you can load the other, nearly doubling your throughput. We recommend the double barrel for commercial and industrial operations.
What power supply does the HN426 require?
The HN426 requires 2.2 KW motor power, compatible with both 220V/50Hz and 380V/60Hz power supplies. We can customize the electrical system to match your local power standards at no extra charge.
How many workers are needed to operate the machine?
Only 1-2 workers are needed. The microcomputer control system automates the pressing cycle, and the 4-hook cake removal mechanism makes unloading easy even after overnight pressing.
What warranty do you provide?
We provide a 1-year warranty covering all manufacturing defects, plus lifetime technical support. Spare parts are available from stock.
How is the machine shipped and how long does delivery take?
The machine is shipped in a wooden crate via sea freight. Delivery to most Asian ports takes 15-20 days, to African ports 25-35 days, and to South American ports 30-40 days. This is in addition to 20-30 working days production time (shipping time additional).
Do you provide installation and training?
Yes, we provide detailed installation manuals, video tutorials, and remote technical guidance. For large orders, we can send a technician to your facility for on-site installation and training at cost.
What certifications does the machine have?
All machines undergo 48-hour continuous full-load testing before shipment.
Can the barrel size be customized?
Yes, barrel inner diameter and height can be customized to match your specific material and batch size requirements. Common customizations include larger barrels for bulk materials and food-grade stainless steel barrels for edible oil production.
What is the residual oil rate in the cake?
The residual oil rate in the cake is typically 6-8% for most materials with our bar-type slotted barrel design, compared to 10-12% with traditional drilled barrel presses. This means you extract approximately 2-3% more oil (based on internal testing, results vary) from every batch.
Can the machine operate on generator power?
Yes, our machines are fully compatible with generator power. For the HN426, we recommend a minimum 5.5kVA generator. The machine starts easily and runs stably on generator power, making it suitable for areas with unreliable electricity supply such as rural Nigeria, Kenya, and other African regions.
Do you provide voltage customization for different countries?
Yes, we customize the electrical system to match your local power supply at no extra charge. Common configurations include 220V/50Hz (Southeast Asia, Africa, Middle East), 110V/60Hz (Philippines, parts of South America), and 380V/50Hz (industrial three-phase). Simply specify your local voltage when ordering.
How quickly can I get spare parts in Africa or the Middle East?
We maintain stock of all common spare parts (seals, filter cloth, hydraulic oil, control panel components). Standard parts ship promptly via DHL/FedEx, arriving in 5-7 days to most African and Middle Eastern countries. For Nigeria, we also work with local agents in Lagos who carry commonly needed parts.
