설명
### **Product Features of PTFE Sealing Gaskets (Food-Grade Applications)**
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#### **Core Product Features**
1. **High Purity & Food-Grade Certifications**
– Material: **Pure PTFE (Polytetrafluoroethylene)**, non-toxic and odorless, compliant with **FDA, EU 10/2011, EHEDG**, and other international food-contact standards.
– Smooth surface (Ra ≤0.8μm) with non-porous structure prevents bacterial growth, compatible with **CIP/SIP cleaning and sterilization**.
2. **Temperature & Pressure Resistance**
– **Temperature range**: **-200°C to +260°C** (short-term tolerance up to +300°C), suitable for steam sterilization (e.g., SIP at 121°C–135°C) and cryogenic environments.
– **Pressure range**: **0.1–10 MPa** (adjustable based on thickness and design), ideal for high-pressure sealing in food-grade pipelines and valves.
3. **Chemical Inertness & Non-Stick Properties**
– Resistant to strong acids, alkalis, organic solvents, and oxidizers; no degradation from prolonged exposure to corrosive cleaners (e.g., NaOH, H₂O₂).
– Ultra-low surface energy prevents material adhesion (e.g., jams, dairy products), ensuring easy cleaning.
4. **Custom & Standard Production**
– **Standard components**: Available in common sizes (DN10–DN500) and thicknesses (1–10mm), compatible with sanitary flanges and valves (e.g., Tri-Clamp, DIN standards).
– **Custom non-standard designs**: Supports specialized shapes, lip/groove seals, and multi-layer composites (e.g., PTFE+elastomer) for complex applications.
5. **Longevity & Low Maintenance**
– Excellent creep resistance and resilience (compression deformation <5%), reducing replacement frequency.
– Lubrication-free design eliminates contamination risks.
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#### **Comparison with FKM (Fluorocarbon Rubber) & EPDM Seals**
| **Property** | **PTFE** | **FKM (Fluorocarbon Rubber)** | **EPDM** |
|—————————-|————————————|—————————————|————————————|
| **Temperature Range** | -200°C to +260°C | -20°C to +200°C | -50°C to +150°C |
| **Chemical Resistance** | Superior (acids, alkalis, solvents)| Excellent (oils, fuels, aromatics) | Good (water, steam, mild chemicals)|
| **Pressure Tolerance** | Up to 10 MPa | Up to 5 MPa | Up to 3 MPa |
| **Non-Stick Performance** | Excellent | Moderate | Poor |
| **Hygiene & Cleanability** | Best (smooth, non-porous surface) | Good (requires surface treatment) | Moderate (porous structure) |
| **Cost & Lifespan** | Higher upfront cost, longer lifespan | Moderate cost, shorter lifespan | Lower cost, moderate lifespan |
**Key Applications**:
– **PTFE**: High-temperature sterilization, corrosive media, and ultra-clean environments (e.g., pharmaceutical CIP systems).
– **FKM**: Fuel/oil-resistant seals in non-food industries (e.g., automotive).
– **EPDM**: Water/steam systems and low-cost food-grade applications (e.g., beverage bottling).
—
#### **Primary Applications**
1. **Food Processing Equipment**
– **Sanitary valve sealing**: Static seals for pumps, butterfly valves, and ball valves (e.g., Tri-Clamp valve gaskets).
– **Pipeline connections**: Flange sealing for tanks, reactors, and transfer lines (e.g., fermentation tanks, concentrators).
2. **Dairy & Beverage Industry**
– **Aseptic filling systems**: Seals for fillers and CIP circuits, resistant to high-temperature sterilization and acidic media.
– **Dairy storage tanks**: Prevents microbial contamination in milk/yogurt storage.
3. **Pharmaceutical & Biotech**
– **Lyophilizers & autoclaves**: Seals for high-vacuum, high-temperature environments (e.g., freeze-dryer doors).
– **Bioreactors**: Chemical and steam-resistant pipeline seals.
4. **Special Fluid Handling**
– **High-viscosity media**: Anti-stick seals for chocolate or jam pipelines.
– **Corrosive cleaners**: Long-term sealing in CIP systems using NaOH/HNO₃.
—
#### **Product Models & Specifications**
| **Type** | **Standard Model** | **Temp./Pressure Range** | **Applications** |
|———————|——————–|————————–|—————————————|
| **Flat Gasket** | PTFE-FS-DN50 | -200°C~+260°C / 0.1–6MPa | Sanitary flange sealing (e.g., beverage lines) |
| **Lip Seal** | PTFE-LIP-20mm | -50°C~+200°C / 0.1–4MPa | Dynamic pump seals (e.g., juice transfer) |
| **Composite Gasket**| PTFE-EPDM-DN80 | -40°C~+150°C / 0.1–3MPa | Cryogenic equipment (e.g., ice cream production) |
| **Custom Gasket** | PTFE-Custom-01 | Customizable | Specialized equipment (e.g., bioreactor flanges) |
—
#### **Industry & Product Keywords**
– **Industry Keywords**: Food-grade seals, sanitary valves, pharmaceutical equipment, dairy processing, aseptic filling, CIP/SIP systems, biotech, EHEDG compliance.
– **Product Keywords**: PTFE gaskets, fluoropolymer seals, FDA-certified gaskets, non-stick seals, high-temperature gaskets, custom PTFE components, Tri-Clamp seals.
—
**Summary**: PTFE sealing gaskets dominate **food and pharmaceutical industries** due to their **chemical inertness**, **extreme temperature resistance**, and **hygienic performance**. While FKM and EPDM are cost-effective for specific scenarios (e.g., fuel resistance or steam systems), PTFE excels in **high-purity, corrosive, or high-temperature environments**. Custom designs further enhance adaptability, ensuring reliable sealing for both standard and specialized equipment.
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