With proven vibration resistance and rugged, durable construction, Seal-Lok™ O-ring face seal fittings and adapters provide leak-free connections that can be trusted. Meeting and exceeding the requirements of SAE J1453 and ISO 8434-3, Seal-Lok is available in steel and stainless steel sizes 1/4" through 2" OD with a working pressure up to 9200 psi.

• Exclusive Trap-Seal design provides optimal seal retention preventing O-ring fallout and pinch.
• Robust Port Stud on SAE adjustable port end eliminates washer damage and potential leaks.
• ToughShield™ Plus, Parker's standard zinc nickel plating on all steel tube fittings and adapters, resists red rust significantly longer than other commercially available plating technologies. It extends fitting service life and decreases corrosion migration to adjacent components, which reduce both downtime and warranty costs.
• Patent-Pending FastSeal™ connection technology creates fast, leak-free ORFS tube connections with only a wrench

Seal-Lok for CNG fittings are tailored to accommodate unique natural gas attributes. They provide reliable fuel conveyance using an elastomeric seal compound made of hydrogenated nitrile that improves ozone resistance and supports wider temperature and pressure range requirements. In addition, it’s a great solution for high-vibration, on-vehicle applications where metal-to-metal sealing is not up to the task. Available in inch sizes 1/4" - 3/4" and metric sizes 6mm - 20mm.

• Fully tested and certified by TUV for NGV 3.1-2014/CSA 12.3-2014, ECE R110, and ISO 15500
• Passed Bonfire Testing in accordance with ANSI/CSA NGV2.
• Available in stainless steel and steel with zinc nickel plating
• Sealing temperature capabilities of -40° to 300°F (-40° to 149°C)

Questions about Seal-Lok for CNG? View our Frequently Asked Questions (FAQ) Sheet.

Seal-Lok Xtreme for LNG applications are field replaceable fittings that use a patented stainless-steel metal sealing ring. Utilizing the ORFS fitting design benefits, superior tube and hose connections will be achieved at temperatures as low as -328°F (-200°C) and as high as 1200°F (650°C) with working pressures up to 6000 psi. Available in inch sizes 1/4" - 2" OD and metric sizes 6mm - 50mm. Additionally, a patented metal port seal to  replace the elastic seal on the SAE J1926 O-ring boss fittings is available.

• Extensively tested in areas of thermal cycling, thermal shock, helium mass spectrometer, leak and burst pressure, rotary flex, thread galling, over toque, thermal shock FEA, and Bonfire Testing.
• Available in SAE/AISI 316/316L stainless steel materials for corrosion resistance

Parker's Parflange® ECO 25 provides fast, leak-free flange tube connections for Seal-Lok O-ring Face Seal (ORFS) fittings. Using an orbital spindle process, it produces high-quality, consistent flanges with a smooth mating surface in less than 45 seconds. The Parflange process eliminates the need for expensive, time-consuming brazing of the sleeve to the tube, and produces significantly greater connection integrity.

• Overall cycle time of 100 seconds
• 110V single-phase power
• Easily moves anywhere in shop
• Adjustable tube stop for range of wall thicknesses

Parker's Parflange® 1025 produces fast, high-quality flange tube connections for Seal-Lok ORFS fittings, Seal-Lok for CNG fittings and Seal-Lok Xtreme fittings. Using an orbital spindle process, it produces high-quality, consistent flanges and flares with a smooth mating surface in less than 25 seconds. The Parflange process eliminates the need for expensive, time-consuming brazing of the sleeve to the tube, and produces significantly greater connection integrity.

• Overall cycle time 60 seconds
• 110V single phase or 440V three-phase
• Compact lightweight design
• Easy operation

Parker's Parflange® Pro 50 provides fast, leak-free flange tube connections for Seal-Lok ORFS fittings, Seal-Lok for CNG fittings, and Seal-Lok Xtreme fitting series. Using an orbital spindle process, this high production machine produces high-quality, consistent flanges and flares with a smooth mating surface in less than 15 seconds. The Parflange process eliminates the need for expensive, time-consuming brazing of the sleeve to the tube, and produces significantly greater connection integrity.

• Overall cycle time of 15 seconds
• 440V three-phase
• Workstation setup with tooling cabinet below unit
• Self-opening and closing dies
• Automatic cycle start triggered by tube insertion

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.

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.