Seal-Lok O-ring Face Seal Fitting | Parker TFD
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ORFS tube connections without brazing or flanging

Parker's patent-pending FastSeal™ technology enables fast, leak-free ORFS tube connections to be made anywhere with only a wrench.

Learn more about FastSeal connection technology

Reliable, Durable, Leak-Free Connection Solutions

Parker's O-Ring Face Seal (ORFS) Fittings and AdaptersParker's Seal-Lok O-Ring Face Seal (ORFS) Fittings and Adapters meet or exceed the requirements of both SAE J1453 and ISO 8434-3 and have international acceptance. It is an ideal hydraulic fluid connection solution across many markets due to its key advantages:

  • Zero clearance for easy plumbing
  • Resistance to over torque/eliminated damage from over-tightening
  • Vibration resistance/reduced loosening caused by system vibration (see vibration test data)
  • Flat face for unlimited remakability

 
Seal-Lok ORFS fittings also come standard with the exclusive Trap-Seal which protects against O-ring fallout and O-ring pinch, both potential issues with the ORFS design. Additionally, Seal-Lok steel tube fittings and adapters come standard with ToughShield Plus zinc-nickel plating which resists red rust for up to 3,000 hours tested to ASTM B117/ISO 9227.

FastSeal™

Parker's FastSeal connection technology is a revolutionary new way to make fast, leak-free O-ring face seal (ORFS) tube connections without the need for brazing or flanging equipment. Using Parker's new patent-pending FastSeal, you'll only need a wrench and your tube. An evolution of proven connection technologies, FastSeal combines Parker's robust bite ring and innovative seal dynamics to create a quick robust flat-face tube connection for Seal-Lok ORFS fittings.

Click on a part number to get more information and to find your local distributor:

  •  4 TLFA-S (1/4" O.D.)
  •  6 TLFA-S (3/8" O.D.)
  •  8 TLFA-S (1/2" O.D.)
  •  12 TLFA-S (3/4" O.D.)

 
Download Bulletin

View the FastSeal Assembly Instructions
FastSeal connection technology creates fast, leak-free ORFS tube connections with only a wrench.

The Seal-Lok ORFS Difference

Parker's Seal-Lok ORFS fittings and adapters are designed and engineered with innovative enhancements that ensure the most superior leak-free connections for customer's applications, minimizing downtime and maximizing their bottom lines.

Parker's patented Trap-Seal design prevents o-ring fallout during shipping and assembly, as well as prevents seal pinch during assembly - the two most common ORFS issues.
Parker's Trap-Seal stops O-ring fallout
Parker's exclusive Robust Port Stud on adjustable SAE ports is manufactured with a longer locknut virtually eliminating washer damage and potential leaks, as well as making assembly virtually mistake-proof.
Parker's Robust Port Stud presents leaks
ToughShield Plus, Parker's standard zinc nickel plating on all steel tube fittings & adapters, resists red rust significantly longer than other commercially available plating technologies. It extends fitting service life, decreases corrosion migration to adjacent components, and reduces maintenance.
ToughShield plating fights corrosion longer
Maximizing the benefits of the ORFS fitting design, Parker created two new versions. Seal-Lok for CNG provides industry-approved fuel conveyance in natural gas applications. Seal-Lok Xtreme’s patented metal seal achieves leak-free connections in extreme temperatures, perfect for LNG or cryogenic.
Seal-Lok CNG and Xtreme Fittings

Resources



The Resource section provides valuable content and tools for customers, including:

• Assembly instruction videos
• Literature and catalogs
• Fitting and equipment apps
• CAD models
• Blog posts and technical articles
• Custom and Rapid Manufacturing Options

Markets



From precision-engineered O-ring face seal tube fittings and adapters to time-saving tube fabrication equipment, Parker delivers reliable solutions to a diverse range of industries and applications.  Parker's engineers are always striving to create new products and innovative enhancements to ensure that the customer's systems last longer. Find out more about how Parker's leak-free connection technology optimizes performance in the markets served.

Where to Buy

Need a hydraulic tube fitting or adapter, or tube fabrication equipment and tooling? Parker’s worldwide distribution network makes it convenient to get the parts you need, either over the phone or at one of our Parker Stores. Locate the distributor nearest to you.

Contact Us

Tell us about your application, request technical or engineering support, or send us your question about Seal-Lok O-Ring Face Seal Fittings and Adapters. Our customer specialists are ready to help.

Live Chat

Have questions or need assistance finding something? Live chat is available most weekdays, 8am-5pm EST so you can talk to a division representative directly. We are here to help!

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