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With their comprehensive performance advantages, PTFE packing rings can achieve a service life 3-5 times longer than traditional sealing materials in harsh operating conditions, making them an ideal choice for enhancing equipment reliability and reducing maintenance costs. Professional installation and regular maintenance inspections are recommended for critical applications.
Product Types
Type
Characteristics
Suitable Applications
Pure PTFE Type
Highest Chemical Purity
Food/Pharmaceutical, Semiconductor
Graphite-Filled Type
Improved Thermal Conductivity
High-Temperature Steam Systems
Glass Fiber Reinforced Type
High Mechanical Strength
High-Pressure Pumps/Valves
Carbon Fiber Type
Excellent Wear Resistance
High-Speed Rotating Equipment
Basic Performance Parameters
Performance Indicator
Parameter Range
Test Standard
Remarks
Material Composition
PTFE ≥ 95%
ASTM D4894
Fillers can be added
Operating Temperature
-200 ~ 260°C
ASTM D7216
Short-term 300°C
Density
2.1-2.3 g/cm³
ISO 1183
-
Friction Coefficient
Friction Coefficient
ASTM D1894
Dry friction conditions
Compression Rate
15-25%
ASTM F36
20 MPa pressure
Rebound Rate
Rebound Rate
ASTM F1314
-
Dielectric Strength
40-60 kV/mm
IEC 60243
1 mm thickness
Product Specification Comparison
Model
Cross-Section Shape
Size Range (mm)
Filler Type
Color Code
PT-200G
Square
3×3 ~ 50×50
None
Pure White
PT-200G
Round
Φ5 ~ Φ60
Graphite
Black
PT-300F
Square
6×6 ~ 40×40
Glass Fiber
Beige
PT-400C
Braided Tape
Width 10-80
Carbon Fiber
Dark Gray
Mechanical Properties Comparison
Test Item
Pure PTFE Type
Graphite-Filled Type
Glass Fiber Reinforced Type
Test Standard
Tensile Strength (MPa)
15-25
20-30
30-45
ASTM D638
Compressive Strength (MPa)
12-15
18-22
18-22
ASTM D695
Wear Amount (mg/100h)
50-80
30-50
20-40
ASTM D3702
PV Limit (MPa·m/s)
0.5
0.8
1.2
ASTM D3702
Industry Certifications
Standard System
Certification No.
Test Item
FDA
21 CFR 177.1550
Food-Grade Compliance
ISO
9001:2015
Quality Management
API
API 622
Fugitive Emissions
REACH
SVHC
Environmental & Safety Compliance
Selection Guide
Operating Condition Feature
Preferred Model
Alternative
Usage Warning
Food Grade Requirement
PT-100
PT-200G (FDA)
Graphite-containing types
High-Temperature Steam
PT-200G
PT-300F
Use with caution >260°C
High-Pressure Environment
PT-300F
PT-400C
-
Strong Acid Media
Specially Treated Type
PT-300F
Prohibited for HF acid
Note: All data based on standard test conditions. Actual service life is affected by installation quality, operational stability, and other factors
Application Areas
Chemical Industry: Reactor, pipeline flange seals.
Food & Pharmaceuticals: Filling equipment, pharmaceutical machinery.
Electronics & Electrical: High-purity media delivery systems.
Aerospace: Cryogenic fuel seals.
Installation Key Points
1. Clean the sealing surface to ensure no contaminants.
2. Install with angled cuts (45°).
3. Control preload force between 15-20 MPa.
4. Initial operation requires a run-in period (24-48 hours).
Maintenance Recommendations
Periodically check compression amount.
Inspect every 6 months for high-temperature applications.
Adjust gland promptly upon detecting leakage.
Market Advantages
1. Long service life (8,000-12,000 hours).
2. Maintenance-free design.
3. Compliant with FDA and other food-grade certifications.
4. Recyclable, environmentally friendly material.
Important Notes
Avoid contact with sharp tools.
Do not over-compress during installation.
Prohibited for use in hydrofluoric acid environments.
