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Optimizing Screw Press Oil Extraction: A Step-by-Step Guide for Small and Medium-Sized Oil Mills
2025-10-04
QI ' E Group
Tutorial Guide
This comprehensive guide walks you through the full process of optimizing the ZY24 (202-3) screw press oil extractor in small and medium-sized oil mills. It covers scientific adjustments in raw material preparation, pressing chamber pressure, temperature control, and machine parameters such as screw speed and screen gap—aimed at boosting oil yield while reducing energy consumption. Tailored for rapeseed, peanut, and sunflower seed processing, it includes practical insights from field technicians, common pitfalls, and real-world case studies to help operators master efficient pressing logic and achieve both higher equipment utilization and superior oil quality.
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Optimize Your Small-Scale Oil Press: A Step-by-Step Guide to Boost Yield & Efficiency

Are you running a small-to-medium oil processing plant and struggling with inconsistent output or high energy costs? You're not alone. Many operators overlook the critical link between raw material prep, machine settings, and real-time adjustments—leading to suboptimal performance from their ZY24 (202–3) continuous screw oil press.

Start Right: Pre-Treatment Is Everything

Before even turning on the press, ensure your feedstock is properly conditioned. For example:

  • Cold-pressed peanuts: Moisture should be between 6–8% — too dry and they won’t release oil efficiently; too wet and it increases pressure loss.
  • Canola seeds: Crush to 1–2 mm particles — this maximizes surface area for oil extraction without clogging the screw.
  • Sunflower kernels: Use a pre-heater set at 70–80°C before feeding — improves flowability and reduces wear on the screw.
“The best screw press in the world can’t compensate for poor input quality.” – Dr. Lin Wei, Former R&D Lead at China Agricultural Machinery Research Institute

Pressure + Temperature = Output Power

Oil Type Ideal Pressure (MPa) Recommended Temp (°C) Avg. Yield Increase
Peanuts 2.5–3.0 85–95 +8–12%
Canola 2.0–2.5 75–85 +10–15%
Sunflower 2.2–2.8 80–90 +7–11%

You may have noticed that many operators run the same settings across all oils — big mistake. Adjusting these parameters based on oil type isn’t just good practice—it’s how you get consistent, premium-grade oil every batch.

Fine-Tune the Machine: Speed, Gap, and Distribution

For the ZY24 model:

  • Screw speed: Keep it at 20–35 rpm for most crops — faster than 40 rpm causes excessive friction and heat buildup.
  • Press gap: Set first section to 1.5 mm, then reduce gradually by 0.2 mm per segment — this ensures gradual compression and minimal fiber damage.
  • Segment distribution: 30% of total length for pre-compression, 50% for main pressing, 20% for final dewatering — matches industry standards used in India, Vietnam, and Brazil.

Pro tip: Monitor the cake thickness exiting the press — if it’s too thin (< 5mm), you’re likely over-pressing. If too thick (>15mm), your feed might be too coarse or moisture too high.

Have you ever seen a press run smoothly one day, then suddenly drop yield the next? It's often due to unnoticed wear on the screw blades or misaligned bushings — common issues we’ve helped dozens of clients fix through simple monthly checks.

Schematic diagram showing optimal screw press configuration for different oil types

Maintenance That Pays Off

Don’t wait until the press fails — schedule a 30-minute daily check: inspect for metal debris, clean the screen mesh, and verify lubrication levels. These steps alone can extend equipment life by up to 3 years and prevent costly downtime.

If you’re serious about maximizing efficiency, reducing waste, and improving product consistency — it starts with understanding how each variable interacts. The ZY24 screw press is powerful, but only when operated intelligently.

Download the Full ZY24 Process Manual PDF – Free + Customize Your Plan Today!

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