Fluid Gas Handling

Hydraulic Connectors That Are as Extreme as Their Environment

Seal-Lok Xtreme O-ring Face Seal Fittings for extreme high and low hydraulic applications

Cryogenic applications such as liquid natural gas (LNG) or high-temp applications such as gas combustion turbine fuel supply lines require specialized tube fittings capable of handling extreme temperatures. I recommend avoiding tube fittings with standard elastomeric sealing for these applications because they are prone to seal degradation and leakage. 

Parker’s Seal-Lok Xtreme™ Flat Face Seal tube fitting line was developed to accommodate the performance demands of both cryogenic applications, as well as high-temperature applications. It offers customers a complete solution for natural gas applications and can be used in combination with our Seal-Lok for compressed natural gas (CNG) product to address both CNG and LNG requirements. 

The difference is in the ring

Seal-Lok Xtreme is made using a patented metal sealing ring. The metal ring withstands severe temperatures as low as -328°F (-200°C) and as high as 1,200°F (650°C), and it eliminates the chemical compatibility issues that can reduce the life of typical elastomeric seals. 

Seal-Lok Xtreme has been extensively tested for the thermal cycle and shock and has performed well with helium mass spectrometer and gas pressure leak testing. The end product achieves fittings that are high vibration resistant and compatible with working pressures up to 5,850 psi.

Benefits of Seal-Lok Xtreme include:

  • Eliminates damage from overtightening

  • Zero clearance for easy plumbing

  • Reduces loosening caused by vibration

  • Unlimited reusability

  • Reduces assembly and disassembly times

  • Seal retention to prevent fallout during shipment and assembly

  • Reduced galling potential due to special dry film lubricated nuts

Meeting the requirements of ASME B31.1 and B31.3, Seal-Lok Xtreme fittings made of SAE/AISI 316/316L stainless steel materials for corrosion resistance. They are available in tube and hose sizes 1/4" to 2" (6mm to 50mm) and pipe sizes up to 2" NPS.

Parker Seal-Lok Xtreme fittings are field-replaceable for easy maintenance and ideal for applications such as:

  • Combustion turbines

  • LNG storage and fueling systems

  • Cryogenic equipment

  • High-temperature engine compartments

  • Instrument panels

  • Chemical process equipment

If you’re looking to get the most out of your hydraulic connections, give us a call at 614.279.7070 or visit our Parker Tube Fittings Division's website to learn more about our diverse line of fittings. We just might have the solution you've been looking for. 

Read articles about hydraulic fitting topics, industry trends and helpful tips for engineers, written by our engineers on our techConnect blog.

Do you want to receive new product announcements and technology updates from Parker Tube Fittings Division? Subscribe today and stay informed


Ted Amling Senior Project Engineer at Parker Hannifin Tube Fittings Divisoin

This article was contributed by Ted Amling, Senior Project Engineer, Parker Hannifin Tube Fittings Division





Related Content for you:

Reduce Combustion Turbine Downtime with Leak-Free Extreme Temperature Fittings

Extreme Temperatures Are No Issue for Parker's Patented Metal Seal for ORFS Fittings

A Closer Look at O-ring Face Seal, 37° Flare, and 24° Flareless Fittings

New O-ring Face Seal Fitting Promotes Environmental Sustainability with Alternative Fuel Compatibility

Have a question about Parker products or services? We can help: Contact Us!

Comments for Hydraulic Connectors That Are as Extreme as Their Environment

Matilde de Jesus Pitty Hernandez
I am also hydraulic-pneumatic engineer. I the the past we solve these extrem situation with ENERPAC. I am clear with this techonology- I am interested in having contact with your company.

Sincerely yours

Matilde de Jesus Pitty íhernandez

Please note that, in an effort to combat spam, comments with hyperlinks will not be published.

Leave a comment