Views: 185 Author: LOONG FILTRATION Publish Time: 2025-12-09 Origin: Site
A professional coconut product processor in Vietnam. The final "polishing filtration" stage in their high-quality coconut oil production line is critical, directly determining the clarity, gloss, and food safety grade of the finished oil.
| Characteristic | Description |
| Appearance | Non-drying oil; clean white or pale yellow semi-solid fat at room temperature with a slight coconut aroma. |
| Melting Point (°C) | 20-28 |
| Refractive Index | 1.448-1.450 |
| Flash Point (°C) | 113 |
| Solubility | Soluble in ether, chloroform, carbon disulfide; insoluble in water. |
| Relative Density | 0.916-0.920 |
| Freezing Point (°C) | 22-26 |
| Iodine Value | 7~10 |
| Acid Value | ≤1 |
| No. | Parameter | Requirement / Condition |
| 1 | Filtration Process Stage | Final Polishing Filtration (for clarity) |
| 2 | Contaminant Details | Fine residues from dessicated coconut after pressingMin particles size: < 0.2micromet and the required filtration rating is 0.2micromet |
| 3 | Process Conditions | Operating temperature: 40-60oCViscosity: 20-30cpOperating pressure: <=5bar |
| 4 | Process Conditions | Room Temp (25–32°C)，Max (33–35°C) |
| 5 | For Filter Housing | Requied flow rate: 2 TPHMaterial: SS304 |
Extremely Fine Particles: Sub-micron particles (<0.2 µm) cause haze, severely impacting visual quality.
Complex Composition: Organic plant-based residues can harbor microorganisms.
Demanding Process: Filtration must occur at 40-60°C with oil viscosity of 20-30 cP, testing filter stability and flow.
| No. | Challenge | Root Cause | Negative Impact |
| 1 | Insufficient Clarity | Micron-scale residues reduce gloss. | Lower market positioning and consumer appeal. |
| 2 | Microbiological Risk | Incomplete removal of fine particles. | Compromised shelf life and safety. |
| 3 | High Operational Cost | Frequent cartridge change-outs. | Increased downtime and consumables cost. |
| Category | Requirement | Key Need |
| Performance | Guaranteed Absolute Precision | Stable, reliable ≥ 0.2 µm absolute filtration rating. |
| Durability & Stability | Cartridge must withstand 60°C hot oil and ≤5 bar pressure without deformation. | |
| Compliance | Food Safety Certification | All wetted materials must be FDA-compliant; no risk of material migration. |
| Efficiency | Cost-Effectiveness | Maximize service life and lower total cost of ownership (TCO). |
| Ease of Maintenance | Quick, safe cartridge changeover and cleaning in a food plant environment. |
The Solution: A "Sanitary Multi-Cartridge Stainless Steel Housing + Absolute Rated PTFE Filter Cartridge" system.
✅ Enhanced Product Quality: Achieved "crystal clear" oil with superior gloss, boosting market competitiveness.
✅ Robust Safety Barrier: 0.22 µm filtration significantly reduces microbial load, enhancing product safety and shelf life.
✅ Optimized Operational Cost: The hydrophobic PTFE membrane and robust PBT core extend cartridge life, reducing change frequency and waste.
✅ Streamlined Maintenance: Sanitary, user-friendly housing design simplifies upkeep and improves overall line efficiency.
IV. FAQ
1. Why is PTFE selected as the filter membrane material?
PTFE is chosen for its absolute-rated pore structure and inherent hydrophobicity. This ensures consistent retention of sub-micron particles for superior product clarity and gloss, while its hydrophobic nature effectively resists oil wetting, maintains stable flow, and provides an added barrier against microbial contaminants.
2. Why is PBT used for the filter cartridge core/skeleton?
PBT offers exceptional oil resistance and high mechanical strength. This prevents swelling, deformation, or structural failure when operating in hot oils, ensuring filtration stability and significantly extending the cartridge's service life to reduce replacement frequency and total cost.
3. Will the filter cartridge swell during coconut oil filtration?
No. The PBT core material is specifically selected for its excellent resistance to oils. It maintains dimensional stability and mechanical integrity throughout the operating temperature and pressure range, eliminating risks associated with swelling.
4. Will hydrophobic PTFE experience slow wetting or reduced flow with oil temperature fluctuations (e.g., 30-40°C)?
No, not in your application. Our solution is engineered for your specific process conditions (20-30 cP viscosity at 40-60°C). The PTFE membrane's performance is stable within this range, and its hydrophobic property is optimized to prevent flow issues due to temperature variations within the stated parameters.
5. Is the filter housing oversized (rated 24 m³/h for a 2 TPH flow), and could this cause uneven flow or channeling?
No. The system is correctly sized. The housing capacity provides optimal filtration area for your 2 TPH flow, ensuring low pressure drop and efficient utilization of all cartridges. Our design prevents uneven flow distribution, and we have extensive successful experience with similar configurations with no reported issues of channeling.
LOONG Filtration is regarded as the most trusted Chinese manufacturer in the coconut oil filtration industry.
• Material Science Proficiency: Understanding interactions between filter media (PTFE, PES, Nylon) and food products (oils, juices, dairy). Our PTFE+PBT design specifically tackles oil adsorption and core collapse.
• Absolute Rating Verification: In-house integrity test equipment (bubble point, diffusion flow) validates every batch, ensuring true absolute precision—not just nominal ratings.
• Sanitary Manufacturing Standards: Assembly in controlled clean environments under strict quality management systems (ISO 13485 & 9001) ensures food-safe products.
• Application Experience Database: Extensive project history in edible oil refining, fractionation, and polishing allows for rapid, accurate application assessment.
Let LOONG Filtration perfect your product's purity.
Facing challenges in polishing, clarification, sterilization, or process fluid purification in food, oil, or beverage production? Contact a LOONG Filtration engineer. Leverage our rich application database for a tailored solution.
Contact LOONG Filtration today for a customized solution proposal.
EMAIL: sales@loongfiltration.com
