Barium Sulfate Filled PTFE Sheet incorporates barium sulfate (BaSO₄) as a reinforcing filler. It features an operating temperature range of -180°C to +200°C, a pressure resistance of up to 83 bar (1200 PSI), and full chemical resistance across the 0–14 pH range; it is particularly recommended for applications involving strong alkaline solutions and hydrofluoric acid (concentrations up to 48%).
Please provide the dimensions and application details, and the Taifno technical team will provide a solution and quote within 24 hours.
Barium sulfate filled PTFE sheet (also known as BaSO₄ PTFE sheet or white filled PTFE gasket) is a high-performance gasket material made from virgin PTFE reinforced with barium sulfate filler. The barium sulfate particles provide structural reinforcement that significantly improves the material's sealing performance while maintaining PTFE's broad chemical compatibility (pH 0-14).
Key benefits of barium sulfate reinforcement:
Superior chemical resistance: particularly effective against strong alkalis and hydrofluoric acid (up to 48%)
Reduced creep relaxation: unique manufacturing process minimizes cold flow problems typical of conventional PTFE sheets
Excellent bolt torque retention: maintains seal over time, fewer re-torquing requirements
High density: up to 3.0 g/cm³ creates optimum conditions for high mechanical stress applications
Tighter seal: reduces product loss and emissions
FDA compliant: meets FDA 21 CFR 170.39 and 177.1550 specifications for food and pharmaceutical applications
Will not support flame: fire safe
Will not support bacterial growth: suitable for clean processes
TA-Luft certified: clean air compliance for fugitive emissions
DNV GL approved: marine and offshore applications
Limitations to be aware of:
Not compatible with molten alkali metals, fluorine gas, anhydrous HF, or sulfuric acid >75% at temperatures above 65°C
|
Problem |
How Barium Sulfate PTFE Solves It |
The Cost of Choosing Wrong |
|
Strong caustics attack standard gaskets |
BaSO₄ PTFE offers superior caustic resistance — pH 0-14 compatibility |
Gasket degradation, leakage, safety incidents |
|
Hydrofluoric acid dissolves other filled PTFE |
BaSO₄ PTFE handles HF up to 48% — silica-filled PTFE cannot |
Catastrophic gasket failure, equipment damage |
|
PTFE creeps under load and leaks |
High density (3.0 g/cm³) + barium sulfate reinforcement reduces cold flow |
Frequent re-torquing, gasket replacement every 6-12 months |
|
Toxic chemical service requires zero emissions |
TA-Luft certified — meets fugitive emissions standards |
Environmental fines, safety violations |
|
FDA compliance needed for food/pharma |
FDA 21 CFR 170.39 and 177.1550 compliant |
Product contamination, batch loss, FDA fines |
|
Feature |
Barium Sulfate PTFE |
Virgin PTFE |
Silica-Filled PTFE |
ePTFE (Expanded) |
|
Density |
★★★★★ 2.9-3.0 g/cm³ |
2.15-2.20 g/cm³ |
2.1-2.3 g/cm³ |
0.7-1.0 g/cm³ |
|
Creep Resistance |
★★★★★ excellent |
★★☆☆☆ poor |
★★★★☆ |
★★★★☆ |
|
Caustic Resistance |
★★★★★ excellent |
★★★★☆ |
★★★★☆ |
★★★★★ |
|
HF Resistance |
★★★★★ up to 48% |
★★★★★ |
❌ NOT compatible |
★★★★★ |
|
Conformability |
★★★☆☆ |
★★☆☆☆ |
★★★☆☆ |
★★★★★ |
|
FDA Compliant |
✅ Yes |
✅ Yes |
✅ Yes |
✅ Yes |
|
TA-Luft Certified |
✅ Yes |
❌ No |
✅ Yes |
✅ Yes |
|
DNV GL Approved |
✅ Yes |
❌ No |
❌ No |
✅ Yes |
|
Best For |
Strong caustics, HF, toxic chemicals, high load |
General chemical |
Strong acids |
Damaged flanges, low torque |
|
If Your Service Is... |
Choose... |
Why |
|
Strong caustics, chlorine, toxic chemicals |
Barium Sulfate PTFE |
Superior chemical resistance + creep resistance |
|
Hydrofluoric acid service (up to 48%) |
Barium Sulfate PTFE |
Specifically recommended for HF service |
|
High mechanical stress / high bolt load |
Barium Sulfate PTFE |
High density (3.0 g/cm³) provides structural strength |
|
Food/pharmaceutical processing |
Barium Sulfate PTFE |
FDA compliant, will not support bacterial growth |
|
Fugitive emissions control required |
Barium Sulfate PTFE |
TA-Luft certified |
|
Badly pitted, warped flanges |
ePTFE (Expanded PTFE) |
Better conformability to irregular surfaces |
|
Strong acids (non-HF) |
Silica-Filled PTFE |
Excellent acid resistance |
|
General chemical, lower cost |
Virgin PTFE |
Universal chemical resistance, lowest cost |
|
Industry |
Application |
Why Barium Sulfate |
|
Chemical Processing |
Strong caustics, chlorine, toxic chemicals, HF service |
Superior chemical resistance + creep resistance |
|
Chlor-Alkali Industry |
Chlorine handling, caustic soda processing |
Specifically designed for chlorine and caustic service |
|
Pharmaceutical |
Sterile processing equipment |
FDA compliance, non-contaminating |
|
Food & Beverage |
Sanitary connections |
FDA compliance, bacteria resistant |
|
Oil & Gas |
Refinery flanges, pipelines — hydrocarbons, aggressive chemicals |
Chemical compatibility + TA-Luft certified |
|
Pulp & Paper |
Caustic processing, digesters |
Strong alkali resistance |
|
Cryogenic |
LNG, cryogenic equipment |
-180°C capability |
|
Parameter |
Value |
Notes |
|
Temperature Range |
-180°C to +200°C |
Continuous service |
|
Max Pressure |
Up to 83 bar (1200 PSI) |
Depends on thickness and design |
|
Density |
2.9 – 3.0 g/cm³ |
High density material |
|
Compressibility |
7-11% |
ASTM F36 M |
|
Recovery |
40-46% |
ASTM F36 M |
|
Tensile Strength |
15-17 MPa |
— |
|
Leak Rate |
0.01 mg/(s x m) |
DIN 28090-2 |
|
Color |
Off-white / White |
— |
|
Material |
PTFE + barium sulfate (BaSO₄) filler |
— |
|
FDA Compliant |
Yes |
FDA 21 CFR 170.39, 177.1550 |
|
TA-Luft Certified |
Yes |
Clean air compliance |
|
BAM Certified |
Available on request |
Oxygen service |
|
DNV GL Approved |
Yes |
Marine applications |
|
Size (mm) |
Thickness (mm) |
Notes |
|
1500 × 1500 |
1.0, 1.5, 2.0, 3.0 |
Standard sheet sizes |
|
1500 × 1500 |
4.0 |
Available on request |
|
1200 × 1200 |
1.0, 1.5, 2.0, 3.0 |
Alternative size |
|
2000 × 2000 |
0.75 – 3.2 |
Large sheet available |
|
Custom sizes |
Available on request |
Cut gaskets available |
100% Virgin PTFE Resin — consistent quality, batch after batch
Barium Sulfate Reinforcement — uniform dispersion for consistent performance
FDA-Compliant — meets FDA 21 CFR 170.39 and 177.1550 specifications
TA-Luft Certified — clean air compliance for fugitive emissions
BAM Approved — oxygen service available on request
DNV GL Approved — marine and offshore applications
Full Traceability — material certificates on request
Lead Time — standard sizes in stock (24-48 hours); custom sizes 7-10 days
A: Available in FDA-compliant grades (FDA 21 CFR 170.39, 177.1550) for food and pharmaceutical applications. TA-Luft certified for fugitive emissions control. DNV GL approved for marine applications.
When NOT to use it: Molten alkali metals, fluorine gas, anhydrous HF, or sulfuric acid >75% at temperatures above 65°C.
A: Barium sulfate filled PTFE offers the highest density (2.9-3.0 g/cm³) among common filled PTFE grades, providing superior mechanical strength and resistance to cold flow.
It is specifically recommended for applications requiring high structural integrity, such as high bolt load equipment, strong caustics, and toxic chemical service.
Unlike silica-filled PTFE which is not compatible with hydrofluoric acid, barium sulfate filled PTFE is recommended for HF service up to 48%. All three grades, barium sulfate, silica, and glass fiber filled PTFE, offer pH 0-14 chemical resistance and FDA-compliant options.
For badly pitted or warped flanges, consider ePTFE (expanded PTFE) which offers superior conformability with similar chemical resistance but lower mechanical strength.
A: Temperature: -180°C to +200°C continuous service.
Pressure: Up to 83 bar (1200 PSI), depends on thickness and design.
Chemical: pH 0-14, NOT compatible with molten alkali metals, fluorine gas, anhydrous HF, or sulfuric acid >75% at temperatures above 65°C.
Three common mistakes:
Using beyond temperature limits: above +260°C, PTFE structure degrades; for higher temperatures use graphite or metal gaskets
Over-tightening: barium sulfate PTFE requires controlled torque; excessive compression can damage the gasket; follow recommended installation torque specifications
Ignoring chemical compatibility limits: verify your specific media against the material's limitations before installation; when in doubt, contact us for verification
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