Editorial Technical Reference

Continuous Screw Press for Oil Extraction

This page explains how Continuous Screw Press for Oil Extraction is classified within Manufacture of Vegetable and Animal Oils and Fats. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

Industrial machine for continuous mechanical extraction of oils from oilseeds and nuts.

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Continuous Screw Press for Oil Extraction in a manufacturing environment
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Product Specifications

Technical details and manufacturing context for Continuous Screw Press for Oil Extraction

Definition
A continuous screw press is a core industrial machine used in the vegetable and animal oils manufacturing industry for the mechanical extraction of oils from various oil-bearing materials such as soybeans, rapeseed, sunflower seeds, peanuts, and palm kernels. It operates continuously, feeding material through a tapered screw within a cylindrical cage, applying increasing pressure to rupture oil cells and separate the liquid oil from the solid meal (cake). This device is fundamental in primary oil extraction processes, providing the crude oil feedstock for subsequent refining stages like degumming, neutralization, and deodorization within the B2B supply chain for edible oils, biofuels, and oleochemicals. The press is designed for continuous operation, with a processing capacity typically ranging from 5 to 20 tonnes per hour, depending on the model and material. The main motor power is usually between 15 and 45 kW, and the screw diameter at the feed end is 200–400 mm. The residual oil content in the pressed cake is typically 5–8% on a dry basis. The machine operates at a screw speed of 10–30 rpm, and the cage temperature is maintained at 80–120°C to ensure oil fluidity. The operating pressure in the pressing chamber can reach up to 1.0–1.6 bar, though the mechanical pressure generated is much higher. The machine's weight ranges from 3000 to 8000 kg, and its footprint is approximately 2500×1200×1800 mm for a mid-range model. The electrical supply is three-phase 380V/50Hz (IEC 60038), and the noise level at 1 meter is ≤85 dB(A) (ISO 3746). Contact parts are made of food-grade stainless steel (SS304, ASTM A240), while the screw and cage are of hardened alloy steel, and the frame is carbon steel. These specifications are reference values; verify model-specific data with the manufacturer.
Working Principle
Material is fed into a hopper and conveyed by a rotating, tapered screw (worm shaft) inside a perforated barrel (cage). As the material moves forward, the volume decreases due to the taper and choke mechanism, generating high mechanical pressure that ruptures oil cells. The expressed oil flows out through the cage perforations, while the de-oiled cake is discharged continuously from the end of the barrel. The screw speed and cage temperature are adjustable to suit different oilseeds, and the pressure is controlled by the choke mechanism.
Common Materials
Hardened Alloy Steel (Screw & Cage), Carbon Steel (Frame & Housing), Food-Grade Stainless Steel (Contact Parts)
Technical Parameters
ParameterTypical rangeNotes & selection driver
Processing CapacityRequired5–20 tonnes/hourMaximum feed rate of prepared oilseed material
Main Motor PowerRequired15–45 kWPower of the drive motor for the main screw shaft
Residual Oil in CakeRequired5–8 %Typical oil content remaining in the pressed cake (dry basis)
Screw DiameterRequired200–400 mmDiameter of the main pressing screw at the feed end
Operating Pressure1.0–1.6 barMaximum mechanical pressure generated in the pressing chamber
Machine Weight3000–8000 kgApproximate net weight of the main press unit
Screw Speed10–30 rpmAdjustable for different oilseeds
Cage Temperature80–120 °COptimal for oil fluidity
Electrical Supply380/50 V/HzThree-phase, other voltages on requestIEC 60038
Noise Level≤85 dB(A)At 1 m distanceISO 3746
Material of Contact PartsSS304Food-grade stainless steelASTM A240
Footprint (L×W×H)2500×1200×1800 mmApproximate for mid-range model

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM
  • Main Screw (Worm Shaft) Part
    Conveys and compresses material to generate extraction pressure
    Material: Hardened alloy steel (e.g., 42CrMo)
  • Pressing Cage (Barrel)
    Perforated cylindrical enclosure that contains the screw and allows oil drainage
    Material: Hardened alloy steel bars or food-grade stainless steel
  • Choke Mechanism Part
    Adjustable cone or bars at the discharge end to control back-pressure and cake thickness
    Material: Hardened steel
  • Main Drive Gearbox
    Reduces motor speed and increases torque to rotate the main screw
    Material: Cast iron housing, alloy steel gears
  • Feed Hopper Part
    Receives and guides prepared material into the pressing chamber
    Material: Carbon steel or stainless steel

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Continuous Screw Press for Oil Extraction.

Expeller Press Oil Expeller Screw Oil Press Continuous Oil Press

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Up to 200 bar (operational), 250 bar (max design)
flow rate: 0.5 to 20 tons/hour (seed throughput)
temperature: Ambient to 90°C (pre-heat recommended for optimal extraction)
slurry concentration: Not applicable - processes whole seeds/nuts, moisture content 5-12% optimal
Media Compatibility
✓ Sunflower seeds ✓ Rapeseed/canola ✓ Palm kernels
Unsuitable: High-moisture materials (>20% moisture) or fibrous residues without pre-treatment
Sizing Data Required
  • Required throughput (tons/hour of raw material)
  • Oil content of feedstock (%)
  • Required cake dryness/residual oil (%)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Screw shaft fatigue fracture
Cause: Cyclic torsional and bending stresses from uneven feed material, misalignment, or overloading, leading to crack initiation and propagation at stress concentrators like keyways or weld joints.
Barrel liner abrasive wear
Cause: High friction and abrasion from hard contaminants in feed material (e.g., sand, stones) or excessive pressure, causing gradual material loss, reduced compression efficiency, and potential oil contamination.
Maintenance Indicators
  • Unusual grinding or scraping noises from the barrel, indicating metal-to-metal contact or liner wear
  • Visible oil leakage around shaft seals or barrel joints, suggesting seal failure or excessive internal pressure
Engineering Tips
  • Implement real-time torque monitoring and automatic feed control to prevent overloads and ensure uniform material flow, reducing stress on the screw shaft
  • Install inline magnetic separators and sieves in the feed line to remove ferrous and abrasive contaminants, and use hardened or replaceable barrel liners with regular thickness inspections

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards
ISO 12100:2010 - Safety of machinery ANSI/ASME B31.3 - Process piping CE Machinery Directive 2006/42/EC

Quoted from the published standard.

Manufacturing Precision
  • Screw shaft straightness: ≤0.05mm/m
  • Barrel bore diameter tolerance: ±0.1mm
Quality Inspection
  • Pressure test: 1.5x operating pressure for 30 minutes
  • Material verification: PMI (Positive Material Identification) for critical components

Manufacturers of Continuous Screw Press for Oil Extraction

5 companies list this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

ABC Machinery
Henan, CN
Also makes: Dust Collector, Filling Machine
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Screw Oil Press”
View source page ↗ abcmach.com · checked 2026-09-04
View profile Send enquiry
AGICO
Jilin, CN
Also makes: Filling Machine, Processor Unit, Agricultural Machinery and 2 more
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Screw Oil Press”
View source page ↗ agico.com.cn · checked 2026-09-01
View profile Send enquiry
Guance Machinery
Zhengzhou, Henan, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Screw Oil Press”
View source page ↗ guanceoilmachinery.com · checked 2026-09-04
View profile Send enquiry
Huatai Intelligent Equipment Group
Henan, CN
Also makes: Vibrating Screen, Drag Chain, Magnetic Separator
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Palm fruit double screw oil press”
View source page ↗ cnhuataigroup.com · checked 2026-09-04
View profile Send enquiry
Zhengzhou Ocean Oil Engineering Co., Ltd.
Zhengzhou, Henan, CN
Also makes: Industrial Chemical Filtration Press, Industrial Chemical Crystallization Unit
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Screw Oil Press”
View source page ↗ zzoceanoil.com · checked 2026-09-04
View profile Send enquiry

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review · Page last updated 16 September 2026

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Frequently Asked Questions

What is the typical processing capacity of a continuous screw press?

The processing capacity typically ranges from 5 to 20 tonnes per hour, depending on the model and the type of oilseed being processed. Verify the exact capacity for your specific model with the manufacturer.

What is the residual oil content in the cake after pressing?

The residual oil content in the pressed cake is typically 5-8% on a dry basis. This value can vary based on the oilseed type, press settings, and preconditioning of the material.

What materials are used for the parts that come into contact with the oilseed?

Contact parts are made of food-grade stainless steel, specifically SS304 (ASTM A240). The screw and cage are made of hardened alloy steel, and the frame is carbon steel.

What electrical supply is required for the press?

The standard electrical supply is three-phase 380V/50Hz (IEC 60038). Other voltages may be available on request. Confirm the electrical requirements with the manufacturer for your installation.

Data basis: editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification
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