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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.
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Principle 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 (%)
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






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.

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


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


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

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