What is the difference between hydraulic oil press and screw oil press

Spiral oil press, belonging to a type of hydraulic fully automatic oil press, mainly uses the rotation and propulsion of the spiral shaft to squeeze out the oil from oil crops. This type of equipment is widely used in home processing and urban commercial on-site processing.

Hydraulic oil press is a type of oil press equipment based on the principle of hydrostatic transmission. It uses liquid as the pressure medium to squeeze oil and extract oil. It can extract oil from various raw materials such as walnuts, sesame seeds, soybeans, etc., and the extracted oil is bright and of high purity.

Walnut oil press

Oil sunflower oil press

Olive oil press

What is the working principle of an oil press

• The working principle of a spiral oil press is that the rotating spiral shaft pushes the material forward continuously within the press chamber. At the same time, due to the shortening of the screw lead or the increase in the diameter of the root circle, the volume of the squeezing chamber space continues to shrink and pressure is generated, compressing the squeezing material and squeezing out the oil in the billet. The oil flows out from the gap of the squeezing cage, while the residue is compressed into cakes and continuously discharged from the end of the squeezing shaft.
• The working process of a hydraulic oil press can be divided into three main steps: oil supply, pressing, and oil discharge. During the oil supply phase, the hydraulic pump station delivers hydraulic oil to the cylinder; During the pressing stage, the pressure and flow rate of the hydraulic system are adjusted through control valves to high-pressure squeeze the oil in the cylinder; During the oil discharge stage, the squeezed oil is discharged and collected.

Advantages and characteristics of oil press

• Spiral oil press:
• High oil yield: Compared with old-fashioned equipment, the oil yield of the spiral oil press can be 2 to 3 percentage points higher, and an average of 2-6 pounds of oil can be produced for every 100 pounds of peanuts processed, with significant economic benefits.
• Energy saving: Under the same output, the spiral oil press can reduce electrical power by 40%, which helps to save electricity costs.
• Labor saving: With the same output, 60% of labor can be saved, and 1 to 2 people can organize production, reducing labor costs.
• Widely used: One machine can be used for multiple purposes, and can extract more than 30 types of oil crops such as peanuts, sesame, rapeseed, sunflower, cottonseed, soybeans, etc.
• Pure oil quality: Vacuum filtration residue is used to ensure the purity of oil quality, which meets health and quarantine standards.
• Excellent Material: Made of high carbon steel, which has undergone high-frequency quenching and heat-resistant treatment, it has high hardness, strong strength, good wear resistance, and is suitable for continuous operation under high temperature and high pressure, thus improving the service life of the oil press.
• Hydraulic oil press:
• High oil yield: The hydraulic oil press adopts high-pressure extrusion method, which can fully squeeze out the oil in the oil and improve the oil yield.
• Pure oil quality: Due to the absence of high temperatures during the pressing process, the organic components of the oil will not be destroyed, ensuring the purity of the oil quality and the preservation of its nutritional value.
• Wide scope of application: the hydraulic oil press can press a variety of oil crops, such as hot pressed oil crops such as sesame, flax, peanut, wheat germ, corn germ, and cold pressed oil crops such as pine nuts, almonds, olives, walnut kernels, camellia seeds, macadamia nuts.
• Easy to operate: The hydraulic oil press has a simple structure, is easy to operate, and is easy to maintain and upkeep.

Zhengzhou Fude Machinery integrates research and development, manufacturing, and sales. We have a professional technical team that deeply understands customer needs, recommends and answers equipment questions for customers, teaches operation techniques, and produces oil presses, refiners, dryers, shellers, etc. If you want to learn about the agricultural product processing industry, please consult us.