Hydraulic Oil Press
Standard Hydraulic Oil Press
Model: HN325
1-Year Warranty • Lifetime Technical Support
Specifications
Model (Single/Double) HN325 Simple / HN325 Double
System Pressure 60 Mpa
Pressing Force 325 Tonnes
Motor Power 2.2 KW
Machine Weight (Single/Double) 1,42 / 1,72 Tonnes
Cylinder Outer Diameter 325 mm
Piston Inner Diameter 260 mm
Barrel Standard Inner Diameter 390 mm (customizable)
Barrel Standard Height 800 mm (customizable)
Cylinder Standard Stroke 850 mm (customizable)
Overall Dimensions (Single/Double) 1200Γ1200Γ2450 / 2100Γ1200Γ2450 mm
Cake Surface Pressure 27.78 Mpa/cmΒ²
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 lacquer oil seed flaxseed + more oil seeds available
Description
Overview
The HN325 Standard Hydraulic Oil Press is our popular hydraulic oil press machine, trusted by oil producers worldwide for its outstanding value and reliable performance. As the standard extended-stroke model in our lineup, it features an 850 mm cylinder stroke that presses all the way to the bottom, handling 100 kg per batch with ease. Whether you are a small-scale producer or running a mid-size operation, the HN325 delivers consistent oil extraction results across a wide range of materials.
The HN325 cylinder paired with a 390 mm inner diameter barrel achieves a cake surface pressure of 27.78 Mpa/cmΒ², enabling most conventional oil seeds to be fully pressed in a single cycle. This can contribute to higher oil yield and lower residual oil in the cake. Actual return on investment depends on many factors including market conditions and operating efficiency.
Production Process & Line Configuration
Hot Pressing Process (Recommended for Maximum Yield)
For optimal oil extraction, we recommend the following production flow:
- Seed Cleaning & Sorting β Remove stones, metal, and other impurities; sort by size and quality
- Dehulling β Remove shells for materials like peanuts (shell removal rate at least 95 percent)
- Moisture Conditioning β Adjust to 5-8% moisture content
- Roasting β Roast at 160-180 degrees Celsius for 25-35 minutes, reducing moisture to 3-5%
- Crushing β Break seeds into smaller particles for better oil flow
- Pressing β Load 100 kg per barrel, press at 60 MPa for 30-40 minutes
- Filtration β Filter through 200-300 mesh for clear oil
- Settling & Storage β Allow to settle before storage in stainless steel tanks
Cold Pressing Process (Premium Quality)
For high-value cold-pressed oils:
- Seed Cleaning β Thorough cleaning and color sorting for premium raw material
- Moisture Conditioning β Adjust to 7-9% moisture content
- Gentle Crushing β Break without generating heat (below 60 degrees Celsius)
- Pressing β Load 100 kg per barrel, press at 60 MPa for approximately 2 hours
- Fine Filtration β Multiple-stage filtration for crystal-clear oil
- Refrigerated Storage β Store in stainless steel tanks at less than 25 degrees Celsius, protected from light
Production Line Balance Considerations
A complete oil production line operates at the speed of its slowest component. To maximize throughput:
- Roasting capacity should be at least 2x the pressing cycle rate
- Filtration capacity must match pressing output
- Storage capacity needs to accommodate daily production volume
- Cake handling systems should be integrated to avoid production bottlenecks
We recommend consulting our engineers to design a balanced production line tailored to your specific requirements and raw materials.
Key Advantages
- Popular Value β One of our most ordered models, offering competitive price-to-performance for general-purpose oil pressing.
- Full-Stroke Pressing β 850 mm cylinder stroke presses to the bottom, ensuring complete oil extraction from every batch.
- Versatile Capacity β Handles 100 kg per batch, suitable for both small and medium production runs.
- Single-Cycle Efficiency β 27.78 Mpa/cmΒ² cake pressure is sufficient for most conventional materials to be fully pressed in one cycle.
- Dual-Barrel Productivity β Double-barrel configuration with dual sliding rails lets you load one barrel while the other is pressing, nearly doubling your throughput.
- Customizable Barrel β Barrel diameter and height can be tailored to your specific material requirements.
Core Technology
- Bar-Type Slotted Barrel β Haonuoβs 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). No clogging, no cleaning between batches.
- German Hydraulic System β Ultra-high pressure combined hydraulic pump station with high-low dual pump. Working pressure up to 60 Mpa with rapid cylinder return.
- 4-Hook Cake Removal β Innovative 4-hook mechanism ensures easy, reliable cake discharge β even after overnight pressing.
- High Carbon Steel Frame β High-frequency quenched and heat-treated steel for long-lasting service under 325-ton pressing force. Actual service life depends on operating conditions and maintenance.
- Microcomputer Control β Automated pressing cycle from loading to finished oil in minutes.
- Energy Efficient β Designed to reduce power consumption compared to previous-generation presses (actual savings vary by operating conditions).
- Labor Efficient β Only 1-2 operators needed, reducing labor requirements compared to manual pressing methods.
Applications & Suitable Materials
The HN325 is ideal for pressing a wide variety of conventional oil seeds:
- Oil Seeds: Tea seed, rapeseed, peanut, soybean, lacquer oil seed, flaxseed
- Other Materials: Sunflower seed, cottonseed, and similar conventional pressing materials
Note: For hard-shell or cold-press materials such as walnuts or apricot kernels, consider our HN426 Cold Press model or HN500 Ultra High Pressure model.
Why Choose Haonuo
- Factory-Direct Pricing β Buy directly from the manufacturer and eliminate middleman markups. The HN325 offers competitive cost per ton of oil extracted compared to similar machines in its class.
- Proven Reliability β As our popular model, the HN325 has been field-tested across thousands of installations with a track record of dependable performance.
- Quality Assurance β Every machine undergoes rigorous testing before shipment, including full-load hydraulic pressure tests and operational cycle verification.
- After-Sales Support β Comprehensive technical support, spare parts availability, and remote troubleshooting assistance to keep your operation running smoothly.
- Customization Options β Barrel dimensions, stroke length, and other parameters can be customized to match your specific material and production requirements.
Regional Advantages
Southeast Asia (Indonesia, Malaysia, Thailand, Vietnam): The HN325 is ideal for small-to-medium coconut and peanut oil production. Compatible with 220V/50Hz power supply standard in the region. Stainless steel barrel option available for food-grade coconut oil production.
Africa (Nigeria, Kenya, Ghana, Tanzania): Built for tough conditions β the HN325βs simple mechanical design means fewer breakdowns and easier repairs. Runs on standard 220V single-phase power or portable generator (5kVA minimum). Spare parts available from stock with 3-day shipping to Lagos or Mombasa.
Middle East (Saudi Arabia, UAE, Egypt): Available with food-grade stainless steel barrel for halal-certified sesame oil production. Temperature control system ensures cold press quality below 60 degrees Celsius for premium grade oils.
Frequently Asked Questions
What is the oil yield of the HN325 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 HN325's 325-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 HN325 press?
The HN325 can press sesame, peanut, rapeseed, sunflower seed, flaxseed, tea seed, soybean, cottonseed, and more. For hard-shell materials like walnuts and almonds, we recommend our cold press or ultra-high pressure models.
How long does one pressing cycle take for peanuts?
For hot pressing (with pre-roasting), one complete cycle takes 30-40 minutes per batch. For cold pressing, the cycle takes approximately 2 hours to preserve oil quality. The microcomputer control system automates the entire process from feeding to cake discharge. The actual cycle time depends on factors like seed moisture content, desired cake dryness, and pressing temperature.
What is the recommended raw material moisture content for pressing?
The optimal moisture content varies by material type and pressing method. For hot pressing, we recommend 5-8% moisture before roasting, with the roasted material reaching 3-5% moisture. For cold pressing, the ideal range is 7-9% moisture. Proper moisture control is critical β too high causes oil emulsification and yield loss, while too low increases friction and reduces throughput.
What pre-processing equipment is needed before the hydraulic press?
Complete oil production typically requires several pre-processing stages Seed cleaning and sorting to remove impurities and damaged seeds; 2) Dehulling for high-shell-content materials like peanuts (shell removal rate at least 95 percent); 3) Moisture conditioning to reach optimal levels; 4) Roasting (for hot pressing) at 160-180 degrees Celsius to develop flavor and color; 5) Seed crushing for improved oil flow. The press itself is the core, but pre-processing directly impacts oil yield and quality.
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 β 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 HN325 require?
The HN325 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. For the HN325, this includes specific coverage for the hydraulic pump station and microcomputer control panel. 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. Sea freight transit to most Asian ports takes 15-20 days from departure, 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). Total time from order to arrival is typically 5-10 weeks depending on destination. Air freight is available for urgent orders.
Do you provide installation and training?
Yes, we provide detailed installation manuals, video tutorials, and remote technical guidance. For the HN325, ensure your installation floor can support at least 2 tonnes and has a minimum ceiling height of 2.5m. 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. For the HN325, the full-load test is conducted at 60 Mpa system pressure with 325 tonnes of pressing force.
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 HN325, we recommend a minimum 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 common spare parts (seals, filter cloth, hydraulic oil, control panel components). Standard parts typically ship promptly via DHL/FedEx. Transit time is approximately 5-7 days to most African and Middle Eastern countries, though customs clearance may add additional time. For Nigeria, we have worked with local agents in Lagos who may carry commonly needed parts. Contact us to confirm current local availability.
