COLD PRESS HYDRAULIC OIL PRESS MACHINE FOR PREMIUM OILS

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 tabung press design achieve approximately 2-3% higher yield (based on Haonuo factory tests with graded sesame and peanut at 6-8% moisture; results vary with seed variety and preparation) than traditional drilled tabung press presses.

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.

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.

For cold pressing, the optimal 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.

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.

A single tabung press press processes one batch at a time. A double tabung press press has two tabung press on sliding rails — while one tabung press is pressing, you can load the other, nearly doubling your throughput. We recommend the double tabung press for commercial and industrial operations.

The HN426 requires 2.2 KW motor power and runs on a standard 380V/50Hz supply. The electrical system can be customized to match your local power standards — simply specify your voltage when ordering.

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.

We provide a 1-year warranty covering all manufacturing defects, plus lifetime technical support. Spare parts are available from stock.

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 production time — 15-25 working days for standard models and 30-45 days for custom or special configurations (shipping time additional).

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.

All machines undergo 48-hour continuous full-load testing before shipment.

Yes, tabung press inner diameter and height can be customized to match your specific material and batch size requirements. Common customizations include larger tabung press for bulk materials and food-grade stainless steel tabung press for edible oil production.

The residual oil rate in the cake is typically 6-8% for most materials with our bar-type slotted tabung press design, compared to 10-12% with traditional drilled tabung press presses. This means you extract approximately 2-3% more oil (based on Haonuo factory tests with graded sesame and peanut at 6-8% moisture; results vary with seed variety and preparation) from every batch.

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.

Yes, the electrical system can be customized to match your local power supply. Simply specify your local voltage when ordering.

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.