Basic Characteristics

Item	Parameter	Test Standard	Feature
Material Composition	PTFE Fiber + Graphite Powder (20-30%)	DIN 3750	Self-lubricating / High-Temperature Resistant
Color	Black (Graphite Composite)	Visual	White (Pure PTFE) customizable
Density	1.8-2.2 g/cm³	ASTM D792	Reduces by 5-8% after lubricant impregnation
Operating Temperature	-200°C ~ +280°C	ASTM D3045	Short-term peak 320°C

Mechanical Properties

Parameter	Standard Value	Reinforced Type	Test Method
Tensile Strength	≥15 MPa	≥22 MPa	ASTM D2256
Compression Rate	25-35%	20-30%	DIN 53853
Recovery Rate	≥45%	≥50%	ISO 1856
Wear Rate (100h)	≤0.1mm	≤0.05mm	ASTM D6078

Sealing Performance

Sealing Performance	Water Sealing	Acid Sealing	Test Conditions
Leakage Rate	≤1×10⁻⁴ mL/min·m	≤5×10⁻⁴ mL/min·m	3MPa / 150°C / 24h
PV Value Limit	2.5 MPa·m/s	3.0 MPa·m/s	Dry Friction Conditions
Suitable Media	Water / Steam / Weak Acid	Strong Acids / Organic Solvents	pH 0-14

Specifications

Parameter	Standard Range	Special Customization
Cross-Section Size	3mm~50mm	1mm~100mm
Braided Structure	Square / Round / Twisted	Multi-layer Composite Braid
Length	5m/roll (±0.1m)	1-100m/roll
Oil Content	5-15% (Optional)	Oil-free (Food Grade)

Certification Standards

Certification Type	Standard No.	Applicable Field
Food Grade	FDA 21 CFR 177.1550	Food / Pharmaceutical
Industrial Safety	ISO 9001	General Industry
Environmental	RoHS 2.0	EU Export
Nuclear Power	RCC-M Standard	Nuclear Power Plants

Application Reference Table

Working Condition	Recommended Model	Alternative Solution
High-Temperature Pump/Valve Sealing	Graphite content ≥25%	Carbon Fiber Packing
Food Machinery	White Pure PTFE	Silicone Sealing Ring
Strong Acid Environment	Special Lubricant Impregnated Type	Ceramic Fiber Packing
High-Speed Rotating Shaft	Reinforced Type (+ Glass Fiber)	Mechanical Seal

Cost-Effectiveness Parameters

Model	Service Life	Replacement Man-hours	Annual Comprehensive Cost (CNY/year)
Standard Type	1.5-2 years	0.5h	120-180
Reinforced Type	3-5 years	0.8h	80-120
Food Grade	2-3 years	1h	200-300

Key Points:

1. Installation Essentials:

   · Shaft surface roughness should be controlled within Ra 0.8-1.6μm.

   · Cuts on each ring of packing should be staggered by at least 120°.

2. Selection Recommendations:

   · Rotating Equipment: Choose reinforced types with graphite content ≥20%.

   · Strong Acid Conditions: Recommend use with corrosion-resistant coated shaft sleeves.

This product has been successfully applied in:

· High-temperature pump seals in petrochemical industry (280°C / 4MPa)

· CIP systems in pharmaceutical plants (pH 1-14 alternating conditions)

· Cooling water pumps in nuclear power plants (RCC-M Nuclear Grade Certified)