Glass microsphere-filled PTFE gaskets offer a reliable sealing solution for applications requiring chemical resistance, dimensional stability, and long-term bolt torque retention.
|
Property |
Value |
|
Color |
Blue |
|
Material |
PTFE + Glass Microspheres |
|
Temperature Range |
-200°C +260°C |
|
Max Pressure |
Up to 55 bar (800 PSI) |
|
pH Range |
0-14 (universal chemical resistance) |
|
Compressibility |
25-40% |
|
Recovery |
≥25% |
|
FDA Compliant |
Yes (select grades) |
|
USP Class VI |
Available (select grades) |
1. Improved creep resistance: unique manufacturing process minimizes cold flow and creep relaxation, providing superior bolt torque retention
2. Universal chemical resistance: pH 0-14, suitable for acids, alkalis, hydrocarbons, solvents, refrigerants, and water
3. Excellent sealing performance: reduces product loss and leakage, extends service life
4. Flange-friendly: soft, conformable material protects delicate flanges
5. Non-flammable: will not support combustion
6. Bacteria-resistant: will not support bacterial growth
7. Large sheet sizes available: improves material utilization, reduces waste
Virgin PTFE is soft, it deforms under sustained load (cold flow), causing bolt torque relaxation and eventual leakage. This is the primary cause of PTFE gasket failure.
Glass microspheres reinforce the PTFE matrix, providing structural integrity that significantly reduces creep and maintains bolt torque over time.
|
Comparison |
Virgin PTFE Gasket |
Glass Microsphere PTFE Gasket |
Customer Value |
|
Creep Resistance |
Poor (cold flow significant) |
Excellent (minimized creep relaxation) |
Longer seal life, less re-torquing |
|
Bolt Torque Retention |
Poor |
Excellent |
Fewer maintenance cycles |
|
Compressibility |
Low |
High (25-40%) |
Conforms to flange irregularities |
|
Recovery |
Low |
≥25% |
Maintains seal integrity |
|
Chemical Resistance |
pH 0-14 |
pH 0-14 |
Equally excellent |
|
Temperature |
-200°C to +260°C |
-268°C to +260°C |
Better low-temperature performance |
|
Typical Service Life |
1-2 years |
3-5 years |
2-3x longer life |
|
Material Cost |
$ |
$$ (30-50% higher) |
Lower 3-year total cost |
|
Advantage |
Description |
Customer Value |
|
Reduced Creep Relaxation |
Glass microspheres minimize cold flow |
Longer bolt torque retention, extended seal life |
|
Excellent Chemical Resistance |
pH 0-14, resists acids, alkalis, solvents, hydrocarbons |
Single material for multiple media |
|
Superior Sealing Performance |
High compressibility (25-40%) and recovery (≥25%) |
Seals on irregular flanges, reliable long-term |
|
Wide Temperature Range |
-200°C to +260°C continuous |
Suitable for cryogenic to high-temperature service |
|
FDA/USP Compliant Grades |
Available for food and pharmaceutical applications |
Suitable for regulated industries |
|
Non-Flammable & Clean |
Will not support flame or bacterial growth |
Safe for hygienic and critical environments |
|
Parameter |
Value |
|
Material |
PTFE + hollow glass microspheres |
|
Color |
Blue |
|
Temperature Range |
-200°C to +260°C |
|
Max Pressure |
Up to 55 bar (800 PSI) |
|
pH Range |
0-14 (universal chemical resistance) |
|
Compressibility |
25-40% |
|
Recovery |
≥25% |
|
Creep Relaxation |
Minimized (superior to virgin PTFE) |
|
Max PxT (1/16") |
350,000 °F x PSIG / 12,000 bar x °C |
|
Max PxT (1/8") |
250,000 °F x PSIG / 8,600 bar x °C |
|
Parameter |
Range |
|
Sheet Size |
1500×1500mm, 2000×2000mm |
|
Thickness |
1.0mm to 8.0mm |
|
Gasket Diameter |
Up to 2000mm |
|
Custom Sizes |
Available on request |
Resists: Acids, alkalis (moderate), hydrocarbons, solvents, refrigerants, water, and most chemicals .
⚠️ Not compatible with: Certain strong alkalis (sodium hydroxide) and some concentrated chemicals — glass microspheres can react . For oxygen service, specify oxygen-grade materials .
|
Industry |
Application |
Why Glass Microsphere PTFE |
|
Chemical Processing |
Flange gaskets, pump seals, reactor covers — acids, solvents, hydrocarbons |
Chemical resistance + creep resistance |
|
Pharmaceutical |
Sterile equipment, bioreactors, clean piping |
FDA/USP compliance, non-contaminating |
|
Food & Beverage |
Sanitary connections, food-grade piping |
FDA compliant, easy cleaning |
|
Petrochemical |
Pipeline flanges, valve seals |
Chemical resistance + low creep |
|
Glass-lined Equipment |
Glass-lined reactors, FRP flanges |
Low torque sealing, conformability |
|
Semiconductor |
High-purity chemical distribution |
Low extractables, high purity |
|
Water Treatment |
Potable water systems |
NSF certified grades available |
|
Cryogenic Service |
LNG, liquid oxygen, cryogenic fluids |
Wide temperature range |
Pipe flanges (steel, FRP, plastic, glass-lined)
Pump housings and covers
Reactor manways and handholes
Heat exchanger covers
Valve bonnets
Sanitary connections
Cryogenic equipment
|
Case |
Challenge |
Solution |
Result |
|
Chemical Plant |
Virgin PTFE gaskets creeping and leaking under sustained load, replaced every 8-12 months |
Installed glass microsphere filled PTFE gaskets |
3 years continuous service, zero leakage — maintenance cost reduced by 60% |
|
Pharmaceutical Manufacturer |
FDA audit required documented seal compliance, traditional gaskets couldn't provide complete documentation |
Provided glass microsphere PTFE gaskets with FDA/USP documentation |
Passed audit with zero findings |
|
Certification |
Description |
|
FDA 21 CFR 177.1550 |
Food contact compliance |
|
USP Class VI |
Biocompatibility certification |
|
NSF 61 |
Potable water systems (select grades) |
|
ABS |
Marine applications |
A: Glass microsphere PTFE gaskets offer significantly improved creep resistance (minimized cold flow), superior bolt torque retention, and higher compressibility (25-40%) compared to virgin PTFE.
Virgin PTFE provides universal chemical resistance (pH 0-14) but creeps under sustained load.
Choose glass microsphere for: High-pressure service, long-term sealing integrity, reduced maintenance frequency.
Choose virgin PTFE for: General sealing, smooth flanges, applications where cost is the primary factor.
Glass microsphere PTFE costs 30-50% more but extends service life 2-3x — lower total cost over the long term.
A: Temperature: Continuous -200°C to +260°C .
Pressure: Up to 55 bar (800 PSI).
Chemical: pH 0-14 universal resistance, suitable for most acids, alkalis, hydrocarbons, and solvents.
⚠️ Not compatible with: Certain strong alkalis (sodium hydroxide) and some concentrated chemicals — glass microspheres may react.
For oxygen service, please specify oxygen-grade materials.
For exact data based on your specific conditions, please provide your operating parameters.
A: Yes. Glass microsphere-filled PTFE gaskets are available in FDA 21 CFR 177.1550 compliant grades and USP Class VI certified grades. They are physiologically harmless, non-toxic, tasteless, odorless, and do not contaminate media.
Suitable for sanitary connections, food processing equipment, pharmaceutical cleanrooms, and potable water systems (NSF 61 certified grades available). Please specify FDA/USP/NSF grade when ordering.
A: MOQ: Depends on product type and specifications, small-batch customization supported.
Lead time: Standard specifications 7-15 working days; special specifications on request.
Samples: Free samples supported (available to both new and existing customers, shipping collect).
Payment terms: T/T (recommended), PayPal, etc.
Quality: 100% virgin PTFE resin; material certificates and origin certificates available.
Address
No.1028, Qiersan Street, Andong Town, Cixi City, Zhejiang Province, China
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