Productscpzx
PTFE Gasket/ PTFE Filled Gasket
Ⅰ、Features
PTFE envelope gasket is a kind of static seals.It is composed of elastic materials such as compressed asbestos sheet,rubber,ceramics,etc. And PTFE envelope cover.
PTFE has superior properties against chemical(not affected by all chemicals except molten alkali metal and fluorine at elevated temperature) and temperature(from - 180℃ ~ +250℃）The coefficient of static and dynamic friction of PTFE are every low.PTFE is the best of the “non-stick”material. It has excellent anti weathering and aging characteristics.
Ⅱ、Types and Specifications:
PTFE Envelope Gasket
Note: （Thickness）Gasket slot width
PTFE Flange Gasket
Different standards of different specifications gasket, according to customer drawings for processing
Ⅲ、Applications
PTFE envelope gasket is used to seal pipe flange anti joint of industrial machinery apparatus which is lined with rubber,plastic ceramics graphite etc.
PTFE Spiral Wound Gasket Technical Description
PTFE spiral wound gaskets are metal-nonmetal composite sealing elements manufactured through a specialized process, formed by alternately winding PTFE tape with metal骨架材料. This innovative structural design perfectly combines the exceptional chemical stability of PTFE with the superior mechanical properties of metal materials, making it a key solution in modern industrial sealing.
Product Core Advantages
1. Exceptional Sealing Performance
· Withstands working pressures up to 26 MPa (Enhanced Type)
· Adapts to various flange surface roughnesses (Ra ≤ 6.3 μm)
· Extremely low leakage rate (< 1×10⁻⁶ mbar·L/s)
2. Broad Operating Condition Adaptability
· Ultra-wide temperature range (-196°C to +260°C)
· Resists corrosive media like strong acids and alkalis
· Excellent creep resistance (< 0.8% deformation at 260°C)
3. Diverse Structural Options
· Offers Basic, Enhanced, Inner Ring types, among others
· Optional metal winding strip materials (304SS/316LSS/Titanium alloy, etc.)
· Optional special surface treatments (Electropolishing/Plasma treatment, etc.)
Typical Application Fields
· Petrochemicals: Hydrogenation units, acid gas treatment systems
· Power Energy: Nuclear main pumps, steam turbine seals
· Pharmaceutical/Food: Bioreactors, sterile piping systems
· Aerospace/Military: Propellant transfer systems, cryogenic storage tanks
Technological Innovation Highlights
· Smart Preload Technology: Integrates shape memory alloys for automatic sealing force adjustment
· Nano Surface Treatment: Significantly reduces friction coefficient (≤ 0.02)
· Eco-Design: Utilizes recyclable metal winding strip structure (Recycling rate > 95%)
Quality Certification System
This product series has passed:
· API 6A (Oil and Gas Equipment)
· PED 2014/68/EU (Pressure Equipment)
· FDA 21 CFR 177.1550 (Food & Pharmaceutical)
· RCC-M (Nuclear Power Equipment) and other international certifications
Selection Advice
Select the appropriate model based on specific operating conditions (pressure, temperature, medium, etc.). Customized solutions are available for special conditions. The newly developed graphene-modified model achieves a thermal conductivity of 18 W/(m·K), meeting special heat dissipation requirements.
Note: Product performance data is based on standard test conditions. For practical applications, consult professional technical personnel for selection confirmation.
Basic Performance Parameters
| Parameter Item | Basic Type | Enhanced Type | Inner Ring Type | Test Standard |
| Structure Composition | PTFE+304SS | PTFE+316LSS | PTFE+Inner Ring | ASME B16.20 |
| Operating Temp. (°C) | -196 ~ +260 | -196 ~ +300 | -196 ~ +260 | ASTM D696 |
| Rated Pressure (MPa) | 10 | 26 | 15 | EN 13555 |
| Compression Rate (%) | 18-25 | 15-20 | 20-28 | DIN 28090 |
| ecovery Rate (%) | ≥ 17 | ≥ 20 | ≥ 15 | ASTM F36 |
| Tape Thickness (mm) | 0.3-0.5 | 0.4-0.6 | 0.3-0.5 | ISO 13000 |
| Metal Strip Profile | V-shape | W-shape | Flat Type | DIN 2690 |
Physical Characteristics Comparison
| Characteristic | Basic Type | Enhanced Type | Improvement Effect |
| Tensile Strength (MPa) | 60-80 | 90-120 | 50% ↑ |
| Thermal Deformation (@260°C) | < 2% | < 0.8% | 150% ↓ |
| Min. Gasket Stress (MPa) | 40 | 70 | 75%↑ |
| Fatigue Life (cycles) | 50,000 | 100,000 | 100% ↑ |
| Permeability (mbar·L/s) | 1×10⁻⁶ | 1×10⁻⁷ | 10x ↓ |
Dimension Parameter Table
| Nominal Diameter DN | ID (mm) | OD (mm) | Basic Type Thickness (mm) | Enhanced Type Thickness (mm) |
| 50 | 54 | 102 | 3.2 | 4.5 |
| 100 | 108 | 158 | 3.5 | 5.0 |
| 300 | 325 | 370 | 4.2 | 6.0 |
| 600 | 620 | 685 | 5.0 | 7.5 |
| 1000 | 1025 | 1100 | 6.0 | 9.0 |
Certification Standards List
| Certification Type | Certification Standard | Applicable Models | Certifying Body |
| Oil & Gas | API 6A | Enhanced Series | API |
| Pressure Equipment | PED 2014/68/EU | Full Series | TÜV |
| Semiconductor | SEMI F57 | Ultra-Pure Type | SEMI |
| Nuclear Power | RCC-M | Nuclear Special Type | AFCEN |
| Food & Pharmaceutical | FDA 21 CFR 177.1550 | Pharmaceutical Grade | US FDA |
Selection Reference Guide
| Operating Requirement | Recommended Model | Key Advantage |
| Strong Acid + High Pressure (≤26 MPa) | 316LSS Enhanced Type | Resists Intergranular Corrosion |
| Cryogenic (-196°C) | Titanium Alloy Strip Type | Excellent Cryogenic Toughness |
| Frequent Disassembly | Graphite Filled Type | Good Self-lubricating Properties |
| Nuclear Radiation Environment | Inconel Strip Type | Radiation Resistance Dose > 10⁶ Gy |
| Food & Pharmaceutical | Electropolished Pharmaceutical Grade | Ra ≤ 0.8 μm |
Innovative Technology Parameters
| Technology Name | Technical Indicator | Commercial Application Stage |
| Shape Memory Alloy Ring | Temp. Response Sensitivity ±2°C | Mass Production |
| Nano-textured Surface | Contact Angle > 150° | Contact Angle > 150° |
| Quantum Dot Marking | Leak Detection Sensitivity 0.01 mm² | Laboratory Stage |
| Self-healing Coating | Repairs Cracks ≤ 0.2 mm | Pilot Stage |
| 4D Printed Winding Core Mold | Forming Accuracy ± 0.05 mm | R&D Stage |
Typical Application Scenarios
| Industry | Typical Equipment | Special Requirements |
| Petrochemical | Hydrogenation Reactor | H₂S Corrosion Resistance |
| Power Energy | Nuclear Main Pump | Radiation Resistance 10⁶ Gy |
| Pharmaceutical/Food | Fermentation Tank | FDA Certification |
| Aerospace/Military | Rocket Fuel System | -196°C Sealing |
Structure Type Comparison
| Type | Structural Feature | Pressure Rating | Applicable Standard |
| Basic Type | V-shape Metal Strip + PTFE | ≤ 10 MPa | ASME B16.20 |
| Enhanced Type | W-shape Metal Strip + Graphite Filled | ≤ 26 MPa | EN 1514-1 |
| Inner Ring Type | Metal Inner Ring Reinforcement | ≤ 15 MPa | DIN 2690 |
| Teflon Composite Type | PTFE + PFA Composite Tape | ≤ 6 MPa | SEMI F57 |
Innovative Technology Highlights
1. Smart Preload Technology
· Integrated Shape Memory Alloy Ring
· Automatically increases sealing force by 15% per 100°C temperature rise
2. Super Surface Treatment
· Plasma Nano-texturing (Contact Angle > 150°)
· Friction coefficient reduced to 0.02
3. Environmental Breakthrough
· Recyclable Metal Strip Design (Recycling Rate > 95%)
· Fluorine-free Eco-friendly Coating Under Development (Experimental Stage)
Current Technology Frontiers:
· 4D Printed Winding Core Molds: Enable complex asymmetric structure forming
· Quantum Dot Marking Technology: Rapid leak point localization
· Self-healing Coatings: Automatic repair of micro-cracks (< 0.2 mm)
This product series has passed 17 international certifications including API 6A and PED 2014/68/EU, with successful application cases in extreme environments such as deep-sea oil fields (3000m water pressure) and space station liquid oxygen systems. The newly released "Zero Leakage 2.0" technical solution enables a 15-year maintenance-free seal life.
