Description

USA Lab PTFE Envelope Tri-Clamp Gaskets with Viton Filler - 1.5" to 12" - USA Made - FDA Compliant

USA Lab PTFE Envelope Tri-Clamp Gaskets with Viton Filler are designed for applications requiring exceptional chemical resistance, broad temperature capability, and reliable compression sealing. The PTFE envelope provides strong chemical resistance while the Viton (FKM) filler improves compressibility, creating a sealing solution that is more effective for demanding sanitary and vacuum applications than rigid solid PTFE gaskets.

These PTFE envelope gaskets are designed to create a pressure-tight seam between stationary Tri-Clamp or Tri-Clover sanitary components, helping prevent unwanted gas or liquid emissions. The combination of a PTFE outer envelope and Viton filler provides a balance of chemical resistance and sealing performance for laboratory, pharmaceutical, and high-purity process environments.

USA Lab PTFE Envelope Tri-Clamp Gaskets are FDA compliant and meet up to 3A standards. They are available for Tri-Clamp sizes from 1.5" through 12" and are suitable for demanding applications across a wide operating temperature range. For best performance, use these gaskets only with High Pressure Tri-Clamps.

PTFE Envelope Viton Filler FDA Compliant 1.5" to 12" Tri-Clamp

Chemical Resistance: PTFE envelope construction provides exceptional resistance for demanding chemical processing environments.

Enhanced Compressibility: Viton (FKM) filler helps improve sealing performance compared with rigid solid PTFE gaskets.

Broad Temperature Capability: Designed for demanding applications with continuous-use temperatures extending from low-temperature service to high-temperature operation.

Why buy from USA Lab

Expert Support
Engineers & technicians on staff.

Quality First
Tested and trusted products.

Fast Fulfillment
Nationwide 1-2 day shipping.

Warranty & Parts
US-based service & spares.

Why choose these PTFE Envelope Tri-Clamp Gaskets?

PTFE envelope construction — provides high chemical resistance for demanding process and laboratory environments.
Viton (FKM) filler — adds compressibility to help create an effective seal where rigid solid PTFE gaskets can be difficult to seal.
Vacuum-capable sealing design — the compressible filler supports reliable sealing in applications where solid PTFE may be too rigid.
High-purity compliance — FDA-compliant materials and USP Class VI compliance support pharmaceutical and high-purity applications.
Multiple Tri-Clamp sizes — available across 1.5" through 12" sanitary connection sizes.

Talk to an expert

Get product guidance, application support, and compatibility information for your sanitary, vacuum, or high-purity process.

Call 734-855-4890

Technical Specifications

Specification	Details
Product	PTFE Envelope Tri-Clamp Gasket with Viton Filler
Connection Type	Tri-Clamp
Available Sizes	1.5" to 12"
Gasket Construction	PTFE envelope with Viton (FKM) filler
Outer Material	PTFE (Teflon)
Filler Material	Viton (FKM)
Color	White / Black
Application	Tri-Clamp / Tri-Clover sanitary connections
Sealing Method	Compression seal
Recommended Clamp	High Pressure Tri-Clamp
Chemical Resistance	High chemical resistance provided by PTFE envelope
USP Compliance	USP Class VI compliance
FDA Compliance	FDA 21 CFR 177.1550 compliant PTFE; FKM inner cores FDA CFR 21 177.2600 compliant
Sanitary Standard	Meets up to 3A standard
Low Temperature Range	-100°F
Minimum Continuous Use (Static)	-65°F
Brittle Point	-100°F
High Temperature Range	+400°F
Maximum Continuous Use (Static)	+400°F

Popular Industries & Use Cases

Botanical Extraction Pharmaceutical Processing Chemical Processing Laboratory Research

Business Solutions & Procurement

Programs & Terms

Exclusive options for businesses and academics.

Apply for Net Terms Academic Discount

Documentation & Compliance

Keep purchasing streamlined and compliant.

Request a Quote Tax Exemption

Custom Solutions

Tailored equipment and integration help.

Custom Request Consulting

Talk to Sales

We’ll help spec the right gasket and sanitary connection for your laboratory or process workflow.

Call 734-855-4890 Email Sales/Support

FAQ

What are USA Lab PTFE Envelope Tri-Clamp Gaskets with Viton Filler used for?

USA Lab PTFE Envelope Tri-Clamp Gaskets with Viton Filler are used to create pressure-tight seals between stationary Tri-Clamp or Tri-Clover sanitary components in laboratory, pharmaceutical, chemical, vacuum, and high-purity process applications.

Why does this gasket use a Viton filler inside a PTFE envelope?

The PTFE envelope provides exceptional chemical resistance, while the Viton (FKM) filler improves compressibility. This combination helps provide a more effective seal than a rigid solid PTFE gasket in applications where compression and sealing performance are important.

Are these PTFE Envelope Tri-Clamp Gaskets FDA compliant?

Yes. The gaskets are FDA compliant and meet up to 3A standards. The PTFE material is FDA 21 CFR 177.1550 compliant, while the FKM inner cores are FDA CFR 21 177.2600 compliant. The source information also specifies USP Class VI compliance.

What temperature range can these PTFE Envelope Tri-Clamp Gaskets handle?

The listed thermal properties include a low temperature range of -100°F, a minimum continuous static-use temperature of -65°F, a brittle point of -100°F, and a maximum continuous static-use temperature of +400°F. The product information also lists an overall continuous-use range of -320°F to +500°F.

Important Shipping Notice!

DISCLAIMER:

All items are carefully packaged to ensure safe delivery. In the rare event that your item arrives damaged, please notify us within 3 days of receipt. We will promptly provide a replacement or issue a refund.

Please note that any damage occurring after delivery is not covered under warranty. We appreciate your understanding and your trust in our products.

Need Support?

We’ll get you answers fast.

Call 734-855-4890

Specifications

Brand:	USA Lab
Material:	Viton center with PTFE outer shell
Conformance:	FDA Compliant / Meets 3A Standards
Temperature Range:	-320°F to +500°F
product_resources_sku:	USA-PTFE-V
display_name:	PTFE Envelope Tri-Clamp Gaskets, FDA Compliant - USA Lab
Warranty Term:	1 Year
Return Window:	30 days
Lead Time:	1–3 Days

Warranty

Limited Warranty Disclaimer

Thank you for your interest in the products and services of CGS™.

This Limited Warranty applies to physical goods, purchased from CGS™ (the “Physical Goods”).

This limited Warranty covers any defects in material or workmanship under normal use during the Warranty period.

CGS™ will Replace or repair the product at no charge, using new or refurbished replacement parts.

The Warranty Period for the Physical Goods purchased from CGS™ is 180 days from the date of Purchase.

A replacement Physical Good or part assumes the remaining warranty of the original Physical Good or 180 days from the date of replacement or repair, whichever is longer.

This Limited Warranty does not cover any problem that is caused by conditions, malfunctions or damage not resulting from defects in material or workmanship of the physical good sold. The Limited Warranty does not cover Shipping, expediting, downtime and or other cause and effect problems or conditions that could exceed the cost of the original Physical Good sold.

The limited warranty does not cover labor of any type for installing or uninstalling of the Physical good sold.

To obtain warranty service, you must first contact us to determine the problem and the most appropriate solution for you.

Shipping & Returns

1–3 Business Days Standard Processing

Return Policy ↗ Varies by Product Warranty Policy ↗ Varies by Product

3 Days to Claim Inspect on Arrival

Shipping

Orders ship within 1–3 business days after payment clears. We ship Monday through Friday via UPS, USPS, and freight carriers.
Freight items (crated, hazmat, dropship, or special packaging) can take 1–5 business days to ship.
Expedited shipping speeds up transit, not processing. Contact us for true rush orders.
PO Box addresses ship USPS. Alcohols, chemicals, and hazmat cannot ship to a PO Box.

Full Shipping Policy

Delivery & Damage Claims

Inspect every shipment on arrival. Claims must be filed within 3 business days.
Visible damage? Refuse the delivery and have the driver document it. We will file the claim and ship a replacement.
Concealed damage: contact us within 2 days with photos of the packaging and item. Keep all packing materials.
Freight services (liftgate, residential, inside delivery) are the customer's responsibility to select for their location.

Damage & Freight Details

Returns

USA Lab branded products are returnable within 30 days of order date with prior authorization. Email us before sending anything back.
Solvents, chemicals, and consumables are not returnable once shipped. Custom and made-to-order items are final sale.
Unused items in original packaging carry a 15% restocking fee. Defective items ship back on us.
Items showing any signs of use, wear, contamination, or modification are not eligible for return.
Glassware damage must be reported within 3 business days of delivery for replacement or refund.

Full Return Policy

Custom & Made-to-Order Items

Customized and made-to-order products are final sale and not eligible for return under any circumstances.
This includes ductless fume hoods, configured tanks and reactors, and any item built to your specifications.
These products are manufactured specifically for your application. Confirm sizing, voltage, and configuration with our team before ordering.
Damage claim coverage still applies. Inspect on arrival and report issues within 3 business days.

Return Eligibility Details

Warranty

USA Lab products are covered against manufacturing defects for up to 3 years, depending on product line.
1 year: chillers, heaters, rotovaps, reactors, vacuum ovens, mixers, and most equipment. 2 years: UVP vacuum pumps. 3 years: scientific freeze dryers.
Wear items (glassware, gaskets, heating elements, sensors) and fittings/steel are not covered. Report defects within 30 days (3 days for glass).
Non–USA Lab brands are covered by their manufacturer's warranty. See the product's Warranty tab.

Full Warranty Policy

International Orders

Import duties, taxes, VAT, and brokerage fees are not collected by USA Lab and are the receiver's responsibility.
Verify your country's customs charges and import restrictions before ordering.
Refused or unclaimed international shipments are refunded minus shipping and a 15% restocking fee.
International orders are generally non-returnable. Damaged items must be reported within 3 business days.

International Guidelines

Questions before you order?

Real people in Livonia, MI. Fast answers, Monday through Friday.

Call 734-855-4890 Contact Us

Summaries above are provided for convenience. The full Policies & Warranty Info pages govern all orders and may be updated at any time.

For Business

Custom

Support

USA Lab PTFE Envelope Tri-Clamp Gaskets with Viton Filler - 1.5" to 12" - USA Made - FDA Compliant

Resources & Downloads