Palm Oil Press Working Principles | Single-Screw vs Double-Screw Machine Selection Guide

Functions and Applications of Palm Oil Presses

Palm oil presses are mechanical devices specifically designed for extracting oil from palm fruits, serving a wide range of production scales from farmers and small oil mills to large oil refineries. As one of the world's most important sources of edible oil, the choice of equipment directly impacts oil yield and economic benefits. With over forty years of technological expertise, the QIE Group focuses on developing efficient, stable, and easy-to-maintain oil presses to help customers achieve continuous production increases and quality assurance.

QIE Group has provided customized palm oil pressing solutions to numerous clients worldwide. We offer a variety of single-screw and twin-screw oil presses to meet diverse capacity requirements. Our professional engineering team provides on-site installation, commissioning, and operation training to ensure stable operation even under high-intensity continuous production. Dedicated maintenance manuals and a spare parts guarantee system support long-term cost control and stable oil production.

Working Principles of Single-Screw and Double-Screw Oil Presses

Single spiral palm oil press

Working principle:

A single-screw oil press uses a single screw shaft to propel material from the feed inlet to the outlet. During this process, the material is subjected to pressing, friction, and heat, gradually releasing the oil. The feed end employs a single-rod double-screw structure and a feeding device to prevent material bridging, ensuring smooth feeding and improving pressing uniformity. The screw pitch is optimized for smooth discharge and excellent oil-residue separation.

Features :

• Simple structure, easy operation, and low maintenance cost

• The frame is stable, the center of gravity is lowered, and the operation is stable.

• Suitable for small-volume production, with reliable pressing effect.

• The feed inlet position is lowered, making feeding easier.

Double Helix Palm Oil Press

Working principle:

The twin-screw oil press is equipped with two intermeshing screw shafts. Through mutual compression and continuous propulsion, the material is automatically drawn into the pressing section, achieving uniform pressing. The multi-stage pressing section and hydraulic cake-aligning system automatically adjust the chamber pressure according to the pressing effect, resulting in low residue content in the crude oil and easy clarification and separation of the oil. The hydraulic system can be operated manually or automatically, enabling precise adjustment of the pressing pressure.

Features :

• High oil yield, uniform pressing, and low residue content in crude oil.

• Low nuclear breakage rate ensures oil quality.

• Suitable for medium to large-scale continuous production lines, with a stable and reliable structure.

• The hydraulic pressing system automatically controls the pressing pressure, improving operational efficiency.

• Suitable for high-intensity, high-volume production needs

Equipment Comparison: Structure, Efficiency, and Maintenance Costs

Selection Recommendations for Producers of Different Sizes

• For small-scale farmers/oil mills : a single screw oil press is recommended, as it has low investment, is easy to operate, and has moderate maintenance costs.

• For large-scale oil mills/high-volume enterprises : we recommend the twin-screw oil press. Although the initial investment is high, the oil yield and production efficiency are significantly improved, resulting in better long-term economic benefits.

Investment and Economic Reference

• Single-screw oil presses are suitable for small oil mills and farmers. The equipment investment is relatively low, and the operation and maintenance costs are simple.

• Double-screw oil presses are suitable for medium and large-sized oil mills. They have a stable structure, uniform pressing, and strong continuous operation capability, but the equipment investment and maintenance requirements are relatively high.

• The selection of suitable equipment should be based on a comprehensive evaluation of daily output, raw material type, budget, maintenance capabilities, and long-term operation plan.

• Efficient equipment and optimized processes can effectively reduce the residual oil content in cake and improve overall resource utilization efficiency.

QIE Group's technical support and after-sales service value

We provide end-to-end support:

• Pre-sales selection consultation helps match the equipment best suited to production capacity and investment budget.

• Equipment installation, commissioning, and operation training

• Continuous technical training and remote after-sales support

• Customer-specific maintenance manuals and spare parts support system

Customer satisfaction has remained above 95% for five consecutive years, and the equipment has been operating efficiently for a long time.

FAQ

1. What production scenarios are single-screw oil presses suitable for?

Suitable for farmers and small oil mills with low production volume, limited budget, and low equipment maintenance requirements.

2. Are the maintenance costs of a twin-screw oil press high?

Compared to single-spiral equipment, double-spiral structures are more complex, have higher maintenance costs and require more technical support, but also offer higher oil output efficiency and production capacity.

3. How do differences in oil yield affect return on investment?

A higher oil yield means more refined oil can be obtained from a unit of raw material, thus improving economic efficiency; however, the complexity of the technology and the maintenance cost also need to be considered in a balanced way, and the final decision should be made in combination with the scale of production and operational capabilities.

4. What are the maintenance frequencies and precautions for oil presses?

Single-screw equipment is relatively easy to maintain; the filter screen can be cleaned and the screw wear checked regularly. Double-screw equipment requires regular adjustment of the screw gap, lubrication of the bearings, and monitoring of pressing temperature and oil output to ensure stable operation.

5. How can oil yield be improved through operation and process optimization?

By properly controlling the raw material pretreatment (crushing, cooking), screw speed, oil temperature, and number of pressing sections, the oil yield can be effectively increased and the residual oil reduced.