SPIRAL OIL PRESS
Oil is extracted from a number of fruits, nuts and seeds for use in cooking and soap making or as an ingredient in other foods such as baked or fried goods. Oil is a valuable product with universal demand, and the possible income from oil extraction is therefore often enough to justify the relatively high cost of setting up and running a small scale oil milling business.Raw material preparation
Oilseeds and nuts should be properly dried before storage, and cleaned to remove sand, dust, leaves and other contaminants. Fruits should be harvested when fully ripe, cleaned and handled carefully to reduce bruising and splitting. All raw materials should be sorted to remove stones etc. and especially moldy nuts, which can cause aflatoxin poisoning. When storage is necessary, this should be in weatherproof, ventilated rooms which are protected against birds, insects and rodents. Some raw materials (for example groundnuts, sunflower seeds) need dehusking (or decorticating). Small manual machines are available to give higher production rates than manual dehusking
Methods of extraction
There are basically three methods of removing oil from the raw materials: solvent extraction, hot processing or cold processing. Solvent extraction is not suitable for small-scale processing because of high capital and operating costs, the risk of fire and explosions from solvents and the complexity of the process. Equipment for hot or cold processing is available at different scales of operation from household to industrial scale. Traditional methods of extraction are described below, followed by higher output manual machines and mechanized extraction.
Click PDF for more detailPrinciple of oil extraction
Expellers are continuous in operation and work by grinding and pressing the raw material as it is carried through a barrel by a helical screw. The pressure inside the barrel, and hence the yield of oil, are adjusted using a ‘choke’ ring at the outlet
Performance Index (Hot extruding) YZS-68 (5.5kw)
| Raw Material | Capacity(kg/hr) | Output Rate(%) | Output Efficiency |
| Cotton seeds | 50-60 | 12-14 | 65-72 |
| Soy bean | 28-37 | 10-16 | 61-65 |
| Peanut kernel | 45-60 | 35-45 | 91-92 |
| Rape seeds | 45-60 | 30-38 | 82-85 |
Performance Index (Hot extruding) YZS-80 (5.5kw)
| Raw Material | Capacity(kg/hr) | Output Rate(%) | Cake Residual (%) |
| Rape seeds | 80-100 | 30-35 | 7.5-8 |
| Ground nuts | 80-100 | 35-45 | 7 |
| Beans | 75-95 | 10-14 | 6.5-7 |
| Sesame | 80-100 | 44-47 | 6.5-7.5 |
| Cotton seeds | 40-50 (cold press) | 10-14 | 5.5-6.5 |
Performance Index YZS-95 (7.5kw)
| Raw Material | Capacity (kg/hr) | Output Rate(%) | Cake Residual (%) | |
| Rape seeds |
Hot pressing | 150-170 | 30-38 | 7.5-8 |
| Cold pressing | 75-95 | 28-35 | ||
| Peanut | Hot pressing | 150-185 | 35-45 | 7 |
| Cold pressing | 65-95 | 32-40 | ||
| Bean | Hot pressing | 135-160 | 10-16 | 6.5-7 |
| Cold pressing | 70-105 | 8-14 | ||
| Sesame | Hot pressing | 150-185 | 44-47 | 6.5-7.5 |
| Cotton | Cold pressing | 95-105 | 10-14 | 5.5-8.5 |
Performance Index YZS-100 （7.5kw)
| Raw Material | Capacity(kg/hr) | Output Rate(%) | Cake Residual (%) | |
| Rape | Hot pressing | 150-170 | 30-38 | 7.5-8 |
| Cold pressing | 75-95 | 28-35 | ||
| Peanut | Hot pressing | 150-185 | 35-45 | 7 |
| Cold pressing | 45-65 | 32-40 | ||
| Bean | Hot pressing | 145-160 | 10-14 | 6.5-7 |
| Cold pressing | 70-105 | 8-14 | ||
| Sesame | Hot pressing | 150-170 | 44-47 | 6.5-7.5 |
| Cotton | Cold pressing | 85-105 | 10-14 | 5.5-6.5 |
Performance Index YZS-120/YZL105 (11kw)
| Raw Material | Raw Material Feeding Per hour(kg) |
Oil Output Per 100kg Raw Material |
Dry Cake Residue(%) | |
| Rape seeds | Hot Pressing | 700-800 | 30-38 | 7.5-8 |
Cold Pressing |
240-300 | 28-35 | ||
| Peanut | Hot Pressing | 500-700 | 35-45 | 7 |
| Cold Pressing | 200-300 | 32-40 | ||
| Bean | Hot Pressing | 600-700 | 10-16 | 6.5-7 |
| Cold Pressing | 250-350 | 8-14 | ||
| Sesame | Hot Pressing | 700-800 | 44-47 | 6.5-7.5 |
| Cotton Seeds | Cold Pressing | 300-350 | 10-14 | 5.5-6.5 |
Performance Index (Hot extruding) YZS-130 (15-18.5kw)
| Raw Material | Capacity (kg/hr) | Output Rate(%) | Cake Residual (%) |
| Rape seed | 333-415 | 30-38 | 7.5-8 |
| Ground nut | 350-450 | 35-45 | 7 |
| Soybean | 290-330 | 10-16 | 6.5-7 |
| Cotton seeds (cold pressing) | 220-290 | 10-14 | 5.5-6.5 |
Performance Index (Hot extruding) YZL130 (18.5kw)
| Raw Material | Capacity(kg/hr) | Output Rate(%) | Cake Residual (%) |
| Rape seed | 410-500 | 30-38 | 7.5-8 |
| Ground nut | 420-500 | 35-45 | 7 |
| Soybean | 350-410 | 10-16 | 6.5-7 |
| Cotton seeds (cold pressing) | 320-370 | 10-14 | 5.5-6.5 |
Performance Index (Hot extruding) YZS-165 (22-30kw)
| Raw Material | Capacity(kg/hr) | Output Rate (%) | Cake Residual (%) |
| Rape seed | 500-625 | 30-38 | 7.5-8 |
| Ground nut | 530-630 | 35-45 | 7 |
| Soybean | 450-530 | 10-16 | 6.5-7 |
| Cotton seeds | 430-500 | 10-14 | 5.5-6.5 |
THE OIL PRESS WITH ELECTRICAL HEATER
YZS series and YZL series are all can designed to this model. It includes electrical heating pipe
and control cabinet. The power of heating pipe is 1.5kw
Usually, when press the oilseeds, the oil press need be grinded first using raw material, in order to make the pressing temperature of chamber reach 80-120 degree. Then there is oil come out. If there is no heater, it takes about 30 minutes to make the temperature reach the appointed temperature. But this kind of heated oil press only needs five minutes.
Moreover, the heater is also helpful for increasing oil output. Especially for lower oil-bearing oilseeds, such as soybean, cotton seeds.
II. INTEGRATED OIL PRESS
The integrated Vegetable Oil Presses are advance model from the oil press. These include motor, vacuum
filter, heater and electric control cabinet. The assistant part can help the oil press with higher output. The function of the vacuum oil filter used to filtrate the crude oil which come out from oil press. They are an ideal choice for customers.
Main Technical Data of Oil press heated by electricity
| Model | Capacity | Power | Weight | Outside dimension |
| YZS-80A | 100kg/h | 5.5+0.75kw | 700kg | 1890*1160*1790mm |
| YZS-95A | 150-200kg/h | 7.5+1.1kw | 900kg | 2100*1200*1890mm |
| YZS-100A | 200kg/h | 7.5+1.1kw | 900kg | 2100*1200*1890mm |
| YZS-120A | 250kg/h | 11+1.5kw | 1000kg | 2200*1250*1890mm |
THE OIL PRESSES WITH DIESEL ENGINE
YZS series and YZL series oil presses also can match the diesel engine as follows.
| Model | YZS-68 | YZS-80 | YZS-95 | YZS-100 | YZS-120 | YZS-130 | YZL130 |
| Power | 8-10HP | 8-10HP | 12-15HP | 12-15HP | 20-22HP | 25-30HP | 30HP |
LARGE SCALE OIL PRESSES
These vegetable oil & biodiesel processing plants are with big capacity which mostly use in
middle-large scale oil plant. They can be divided into two kinds: One is hot processing, which
includes steam cooker and oil press. The steam cooker is used for oilseeds pretreatment before
pressing. The other is the cold processing. The advantage of this kind of machine is lower temperature when press the seeds. It is about 80 degree, which can protect the nutrition element in the oil.
These are oil plants with big capacity, high oil output, low oil residual, light processed fats color, good quality,
rich nutrient.
Main technical Data of Large bio diesel processing plants
| MODEL | CAPACITY(T/D) | POWER(KW) | NET WEIGHT(KG) | DIMENSION(MM) |
| 200A-3 | 8-10 | 18.5 | 4300 | 2850*1850*3270 |
| YZL24 | 20 | 45 | 5000 | 2900*1850*3240 |
| YZL28 | 40-60 | 50+11+4 | 9160 | 3740*1920*3843 |
| YZL32 | 90-120 | 90+11+5.5 | 11000 | 4100*2270*3850 |
Clarification of oil---Oil filter
Crude (freshly extracted) oil contains moisture, and fiber, resins, colors etc. from the plant material, which make it darker
and more opaque. These materials are removed by clarification – either by letting the oil stands undisturbed for a few days
and then separating the upper layer, or by using an oil filter. The oil is filtered through a cloth and heated briefly to 100°C to boil
off any remaining traces of moisture. This is usually sufficient to meet the quality needs of customers and give a shelf life of
several months when correctly packaged. However, the oil requires additional refining stages of de-gumming, neutralising and de-colouring to have a similar quality to commercially refined oils, and these stages are difficult to complete at a small scale.
Main Technical Data
| Model | Capacity | Power | Net Weight | Outside dimension |
| YLY-250 | 100kg/h | 0.75kw | 155kg | 840*610*710mm |
| YLY-350 | 200kg/h | 1.1kw | 500kg | 1340*7200*940mm |
| YLX-65 | 1000kg/h | 3kw | 2500kg | 3000*1020*1187mm |