Pure PTFE Sealing Elements

Custom PTFE O-Ring Manufacturer

CNC-machined pure PTFE O-rings for chemical processing, semiconductor, pharmaceutical, food processing, and aerospace static sealing applications. Virgin PTFE, universal chemical resistance, -200°C to +260°C, zero media absorption, non-contaminating. Custom PTFE O-ring dimensions — cross-section from 1mm to 20mm, ID from 3mm. ISO 9001 certified, FDA, USP Class VI, and 3A Sanitary compliant.

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Custom pure PTFE O-ring for chemical flange sealing and semiconductor gas applications

O-Ring Specifications

PTFE O-Ring Sizes & Manufacturing Capabilities

We manufacture pure PTFE O-rings via CNC machining from virgin-grade PTFE resin — no fillers, no additives, no recycled content — ensuring consistent chemical resistance, temperature performance, and purity across every O-ring produced.

PTFE O-Ring Characteristics

Pure PTFE O-rings provide universal chemical resistance — compatible with virtually all acids, solvents, caustics, and hydrocarbons except molten alkali metals and elemental fluorine at high temperature. Operating temperature range from -200°C to +260°C with zero media absorption and zero swell. Unlike rubber O-rings, PTFE does not age, crack, or degrade over time. The non-stick, non-contaminating surface makes PTFE O-rings ideal for semiconductor, pharmaceutical, and food-grade applications. PTFE O-rings are best suited for static face-seal and flange applications where their lower elasticity compared to rubber is compensated by higher bolt loading. CNC-machined to your exact dimensions with tolerances down to ±0.05mm — no mold charges, fast turnaround on any size.

PTFE O-Ring Capabilities

MaterialPure Virgin PTFE (Teflon)
Size StandardFully Custom CNC-Machined
Cross-Section1.0mm – 20mm
Inner Diameter3mm – 2000mm
HardnessShore D 50 – 65
Tolerance±0.05mm
MOQ1 pc (prototype), 50+ (production)
CertificationISO 9001, FDA, USP Class VI, 3A Sanitary

Product Gallery

PTFE O-Ring Manufacturing Projects

Custom PTFE O-ring standard size for chemical flange static seal

Pure PTFE O-ring for pharmaceutical sterile connection USP Class VI

Large diameter PTFE O-ring for chemical reactor flange seal

CNC-machined PTFE O-ring batch for semiconductor gas delivery system

Thin cross-section PTFE O-ring 1mm for precision instrument sealing

Custom PTFE O-ring set for high-pressure hydrogen static sealing application

Applications

Industries Using Our PTFE O-Rings

Chemical Processing

PTFE O-rings for flange seals, pipe connections, and vessel closures in acid, solvent, and aggressive chemical service. Unlike rubber O-rings, PTFE O-rings have zero swell, zero chemical attack, and maintain sealing integrity in all media except molten alkali metals.

Semiconductor Manufacturing

Ultra-pure virgin PTFE O-rings for gas panels, etch chamber seals, and chemical delivery systems. Non-contaminating, low outgassing, no metal ion leaching — meeting semiconductor fab purity requirements.

Pharmaceutical & Food Processing

FDA 21 CFR and USP Class VI compliant PTFE O-rings for sterile connections, CIP/SIP systems, and food contact equipment. Full batch traceability and regulatory documentation.

Why Choose Our PTFE O-Rings

Engineered to Replace Rubber O-Rings

Universal Chemical Resistance

Pure PTFE O-rings are chemically inert to virtually all media — acids, solvents, caustics, and hydrocarbons. No swelling, no cracking, no degradation. Replace your rubber O-rings that fail in chemical service.

-200°C to +260°C Range

PTFE O-rings maintain sealing performance across a wider temperature range than any elastomer O-ring. No stiffening at cryogenic temperatures, no thermal degradation at continuous high heat.

CNC-Machined, No Mold Charges

Custom PTFE O-ring dimensions without expensive tooling. CNC machining allows any cross-section and diameter — cost-effective for prototypes, small batches, and large custom O-rings.

Full Certification Package

Every PTFE O-ring order includes material certificates with batch traceability. FDA, USP Class VI, 3A Sanitary, and EN 1935/2004 documentation available for regulated industries.

Common Questions

PTFE O-Ring FAQ

PTFE O-rings vs rubber O-rings — what are the advantages of PTFE? +

PTFE O-rings offer universal chemical resistance across -200°C to +260°C with zero media absorption — no swelling, no cracking, no degradation in acids, solvents, or aggressive chemicals. Rubber O-rings (NBR, EPDM, FKM, FFKM) have limited chemical compatibility and narrower temperature ranges. The tradeoff: PTFE is less elastic than rubber, requiring higher bolt loads and making it best suited for static face-seal and flange applications. Our engineers can advise on gland design to optimize PTFE O-ring sealing performance.

Can you manufacture PTFE O-rings in any custom size? +

Yes. We CNC-machine custom PTFE O-rings to any ID and cross-section you specify — from 1mm to 20mm cross-section, IDs from 3mm up to 2000mm. CNC machining allows any PTFE O-ring dimension without mold charges, making small-batch and one-off custom O-rings cost-effective. No minimum on custom sizes — order from 1 piece for prototype evaluation.

Are your PTFE O-rings FDA and USP Class VI compliant? +

Yes. We supply FDA 21 CFR 177.1550 and USP Class VI compliant virgin PTFE O-rings for pharmaceutical, food processing, and medical device applications. Every O-ring is made from certified virgin-grade PTFE resin — no recycled materials, no fillers. Full material traceability and compliance certificates provided with each shipment.

What applications are PTFE O-rings best suited for? +

PTFE O-rings excel in static sealing applications where chemical resistance and wide temperature range are critical — chemical processing flange seals, semiconductor gas panel seals, pharmaceutical sterile connections, food processing equipment, and cryogenic or high-temperature static joints. Due to their lower elasticity compared to rubber, PTFE O-rings are best used in face-seal (axial) gland designs rather than piston or rod dynamic seals. For dynamic applications, consider our spring-energized seals or guide rings instead.

What is the minimum order quantity for custom PTFE O-rings? +

We accept PTFE O-ring orders from 1 piece for prototype evaluation and fitment testing. Small batch orders start at 50 pieces. Volume pricing available at 500+ and 5,000+ pieces for production PTFE O-ring orders.

How do I design a gland for a PTFE O-ring static seal? +

PTFE O-rings require different gland design than rubber O-rings due to lower elasticity. We recommend a face-seal (axial) gland with 10-15% compression, smooth surface finish (Ra 1.6μm or better on sealing faces), and adequate bolt spacing to distribute load evenly. Send us your flange or housing dimensions and our engineers will provide a gland design review and PTFE O-ring size recommendation as part of your quotation.

Request a Quote for Your PTFE O-Rings

Get in Touch

Start Your PTFE O-Ring Project Today

Send us your PTFE O-ring dimensions or gland drawing. Our engineers will review and provide a detailed quote within 24 hours.

I help engineers and procurement teams with PTFE O-ring selection — fully custom dimensions. I'll review your flange or gland drawing, confirm the optimal PTFE O-ring size and tolerance, and provide a complete quotation.

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What We'll Check For Your PTFE O-Ring

✓ Cross-section & inner diameter

✓ Gland / groove dimensions

✓ Chemical media compatibility

✓ Operating temperature & pressure

✓ Static vs dynamic application

✓ Regulatory certification needs

🔒 Your drawings and project information are kept confidential. NDA available on request.