The pressing method, which uses physical pressure to separate the oil from the oilseeds, originated in the traditional process, and is now an industrial operation. The pressing method does not involve the addition of any chemical substances, and the components of the extracted oil remain relatively intact, but the disadvantage is low oil yield than solvent extraction method.

The main differences as following:
1. Different processing technology: the processing technology of pressed oil is "physical pressing method ", while the extracted oil is" chemical method ".
Different nutritional ingredients: pressed oil has color, fragrance and taste. The extracted oil is colorless and tasteless.

2. Both methods have their advantages.
1. The advantages of the solvent extraction method: compared with the pressing method, it has less residual oil in the meal and higher oil yield. Low processing cost; Low labor intensity, good production conditions; Good quality of cake and other advantages. Generally, the oil yield of extracted method is 3% higher than that of pressing method, which can effectively improve the economic benefit of enterprises. The extracted oil needs to be refined to reach edible standards, but it is inevitable that some vitamins and other nutrients will be lost in the process of high temperature refining.
2. The advantages of the press method: It can keep the original flavor and nutrients of the material well, with a long shelf life, without any additives, without solvent residue and soap content. It is a pure natural green oil making process produced by combining modern technology and traditional technology.

Check the cylinder and air supply system for faults and check that the pipe connections meet the requirements.If the position of the travel switch is incorrect or has been disconnected, adjust the position of the travel switch and check the line.

Check the cylinder and air supply system for faults and check that the pipe connections meet the requirements.If the position of the travel switch is incorrect or has been disconnected, adjust the position of the travel switch and check the line.

Check the cylinder and air supply system for faults and check that the pipe connections meet the requirements.If the position of the travel switch is incorrect or has been disconnected, adjust the position of the travel switch and check the line.

Check the cylinder and air supply system for faults and check that the pipe connections meet the requirements.If the position of the travel switch is incorrect or has been disconnected, adjust the position of the travel switch and check the line.

Check the cylinder and air supply system for faults and check that the pipe connections meet the requirements.If the position of the travel switch is incorrect or has been disconnected, adjust the position of the travel switch and check the line.

Check the cylinder and air supply system for faults and check that the pipe connections meet the requirements.If the position of the travel switch is incorrect or has been disconnected, adjust the position of the travel switch and check the line.

Check the cylinder and air supply system for faults and check that the pipe connections meet the requirements.If the position of the travel switch is incorrect or has been disconnected, adjust the position of the travel switch and check the line.

Check the cylinder and air supply system for faults and check that the pipe connections meet the requirements.If the position of the travel switch is incorrect or has been disconnected, adjust the position of the travel switch and check the line.