Product Description

Walnut oil processing expeller machine can process more than 50 kinds of oil plants, with high oil recovery, energy-efficient, full-auto production flow, small cover an area. It can hold 6-10kg materials each time and need 6-10 minutes to press the seed. The machine has advantages of fast speed oil made, and high quality oil.

Walnut oil processing expeller machine

Walnut oil is very nutritious. We provide all machines necessary for a complete Walnut oil plant, including pre-treatment machines, press, solvent extractors, refinery machines, etc.

I. Walnut pretreatment

Before extracting oils and fats from Walnuts, the mill needs to prepare it by cleaning, crushing, softening, flaking and cooking. For cleaning, we offer magnetic separator, aspirator or different size cleaning sieves, as shown below, to remove impurities from Walnuts.

Then, the temperature and moisture of groundnut pieces will be adjusted by conditioner or softening kettle so that they become soft and wet enough for flaking. This step improves their ductility. It is special for groundnut oil seeds. Below is photo of softening kettle.

The flaking roll will make the wet soft Groundnut pieces into flakes. We have vertical flaking roll, multi-stage flaking roll, hydraulic flaking roll and spring flaking roll etc., as shown below.

Finally, the flakes will be cooked to make tiny oils and fats groups get together to become bigger, and to make them less adhesive, easier to get out of flakes.

II. Walnut oil press

The flakes will be pressed by continuous screw press firstly. After pressing, they fall into two parts: pressed oil and pressed cakes. The oils and fats in pressed cakes will be further extracted by solvent.

Main engine of walnut press machine

Main engine includes base, upright, top plate, oil drip pan nut and so on, it is one of the main parts. Firstly the oil material is put into the assembly of the press boring, then it is drove up by the oil cylinder piston. Oil will flow out from the gap of press boring, and then pass the oil drip pan to the drum for storage. Hydraulic system of walnut press machine

Hydraulic system is the main power force of this machine, it includes transmission shaft, turbine, worm gear, gear pump, high pressure pump, overflow valve; super high pressure safety valve; hand-operated valve; seamless steel tube; pipeline connect and other spart parts. This machine adopts the advanced power pack of the word, and compared with two plunger pump. It is faster, higher pressure and can resist higher temperature. It can keep working when the oil is above 65 degree, but cooling unit is nessary.

Electronic system of walnut press machine

Electronic system is the most advanced part of this machine, it is fully automatic, easy to operate. There no special request to the operator, so this machine is particularly suitable for peasant. It is composed of motor, volt meter, pressure gauge, power insurance and so on.

Main Technical Parameters




Horizontal Hydraulic

Production Condition

1-2 staff, plant 30m3





Working Thrust


Motor Power







Screw speed





Gear ratio

15/40*15/55=1 : 9.78

15/34*15/55=1 : 9.59

15/38*19/48=1 : 7.38

15/38*15/52=1 : 8.78
















Vacuum pump










Walnut oil press machine features

1. High oil yielding, low oil residual in the cake:The oil left in cake is less than 6%. The cake thickness can be adjusted once the machine stops running;

2. Compact size: only 10-20m2 is enough.

3. High purity: machine surface is made of chrome plated stainless steel, in line with food hygiene standards.

4. Easy operation. You should operate as per the instruction.

5. Components:Screw pressing part, Electrical controlling system, automatic heater, adjusting mechanism, driving unit and vacuum oil filter etc.

6.Convenient and safe: concise structure, small occupation area, it use the fully enclosed protection,convenient and safe operation.

III. Crude oil refining

Crude Groundnut oil has a lot of impurities, such as phosphatide, free fatty acid, pigment, wax, sterol, sands, etc. We have to get rid of these impurities to get edible oil.


There are many ways to move the mucilaginous impurities from crude oils and fats, for example, hydration, heating, adding acids, etc. We’ve hydration tank, acid refining mixer, etc., as shown below.


This step is to remove pigment from crude oil to adjust its color. You can adjust according to the requirement of your market. We’ve acid refining tank.


This step is to move unpleasant smell from crude oil. This is an important station for refined oil. We’ve deodorizing tank.

our services

Whole set of equipment for palm oil production line. Motor and power control system. Installation material. Installation and test-run. Drawing of process description, equipment layout, foundation and construction. Drawing of power control. Isolation and painting of equipment. Water recycling and cooling system outside the plant (i.e. supplementary device). Staff training and long-term technical service.

Company Information

Main business field

10-500T/H oil material primary cleaning,drying and storage section turn-key project. 100-3000 T/D oil pretreatment, shelling and pre-press workshop turnkey project (soybean hot dehulling, bean skin crushing, the soybean extrusion, high oil contained pre-pressed cake extrusion and high oil contained flakes puffed directly). Rice bran turn-key project. 100-3000 T/D leaching workshop turnkey project (towline extractor, rotocel extractor, loop type extractor, DTDC separated machine, the full negative pressure evaporation, Paraffin wax recovery, leaching workshop degumming, phospholipid concentration). 30-1000T/D continuous physical (chemical) refining line. 20-3000T/D sunflower oil, rice bran oil, corn germ oil dewaxing turnkey project. 10-200T/D fatty acid esterification edible oil production line.


Walnut Oil Processing Expeller Machine
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Walnut Oil Processing Expeller Machine supplier

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