How to Choose the Right Peanut Oil Press: Screw vs. Hydraulic Machines

Peanut oil is one of the most popular edible oils in the oil market, known for its rich nutritional content and strong aroma. It is high in unsaturated fatty acids, particularly linoleic acid and oleic acid, which are beneficial for cardiovascular health. As household income and living standards in China continue to improve, the consumption and market demand for peanut oil have steadily increased, attracting many entrepreneurs looking to invest in peanut oil processing equipment and establish production facilities.

The oil press is one of the main machines used in peanut oil processing. The physical pressing process helps retain the flavor and nutrients of peanut oil while avoiding chemical solvent residues. The resulting oil has a great taste and aligns with consumers’ preferences for healthy eating, making it a popular choice in the market.

Oil pressing techniques are divided into hot pressing and cold pressing, each with its own advantages. Hot pressing has a higher oil yield, darker color, and richer aroma, offering a good taste. Cold-pressed oil, on the other hand, has a bright color, retains more nutrients, has a fresh fragrance, and boasts superior quality. However, hot pressing involves high-temperature roasting, which can lead to nutrient loss, and the finished oil requires further refining. Cold pressing has a lower yield, higher production cost, and a higher market price than hot-pressed oil.

Types of Oil Presses: Screw vs. Hydraulic

The main types of presses used are screw presses and hydraulic presses.

Screw Presses:

Feature higher automation. Raw materials can be fed directly via conveyor systems for pressing. Production lines can achieve automated operation. They significantly outperform hydraulic presses in production efficiency and oil yield. However, the oil quality is generally not as high as that from hydraulic presses.

Hydraulic Presses:

Use static pressing with minimal friction, yielding superior oil quality. However, production requires manual assistance for loading materials and removing cakes (residue), resulting in much lower efficiency and automation compared to screw presses.

A good oil press can significantly ease the challenges of oil processing. The right machine model can process rapeseed, soybeans, peanuts, cottonseed, tea seed, and other granular oil-bearing materials. When purchasing equipment, buyers should inspect the machine’s exterior for uniform paint coating and check for missing parts. They should also manually rotate the large belt pulley several times to ensure there are no foreign objects like iron fragments inside the pressing chamber and that there are no obstructions. Additionally, checking the gearbox for proper gear engagement is crucial. For further assistance, buyers can consult Huatai Grain and Oil Equipment manufacturers, whose representatives can recommend suitable equipment models and production line solutions based on specific needs.