Description
### **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).
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#### **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.
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#### **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) |
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#### **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.
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**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.
About us
At HongTai, we specialize in high-quality sanitary valves and stainless steel pipe fittings，serving key industries such as pharmaceuticals, food processing, and chemicals. Made from premium 304, 316, and 316L stainless steel, our products offer excellent corrosion resistance and are crafted using advanced manufacturing techniques like laser cutting and precision welding. Designed for hygiene and fluid integrity, HongTai’s valves are the ideal choice for industries requiring optimal cleanliness and long-lasting performance.
Why Choose Us
Quality Assurance: We maintain strict control over every production stage, from raw materials to finished products, ensuring compliance with ISO9001 and international certifications, including 3A, DIN, and ISO standards.
Industry Expertise: Decades of experience in providing solutions for critical industries like food, beverage, and pharmaceuticals.
Advanced Technology: Our state-of-the-art facilities, including regularly updated CNC lathes and precision tools, guarantee high surface accuracy and tight tolerances for every product.
100% Inspection: Every product undergoes rigorous testing, including size and valve leak detection, to ensure flawless quality before it leaves our facility.
Global Reach: Trusted by businesses around the world for our consistent quality and on-time delivery.
Choose HongTai for unmatched reliability, performance, and innovation in valve and pipe fitting solutions.
Contact us
For more information or to discuss your requirements, reach out to us via:
Email: ht@htcdf.com
whatsapp: (86)18875809195
You can also visit our Contact Us page for more ways to get in touch.
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