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Seal-Lok / O-Lok for Hydrogen
Seal-Lok / O-Lok: O-Ring Face Seal & Parflange® Tube Forming for H2
Proven H2 compatible compound with sealing temperatures of -55°C to 85°C
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Best fitting for high vibration applications
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Tested in accordance with EC79
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Zero-clearance for fast and easy plumbing
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Suitable for on-vehicle and infrastructure applications
Easy Assembly With Parflange® Technology
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Parker Parflange® equipment is designed to make fast, leak-free connections for Seal-Lok tube fittings and are available to purchase or rent to meet all production needs.
Seal-Lok (USA) and O-Lok (Europe) Threaded Adapters
• 316/316L construction
• H2 compliant/tested/approved elastomers (PU, EP, FKM, HNBR)
• Precision machined
• SAE-ORB Port (UNF-2A)
• Sealing with resilient H2 compatible o-rings
• HGV3.1 and EC79 compliant
• H2 stamp/marking
• SAE ½ Dovetail o-ring groove for seal retention
• SAE J1453/ISO 8434-3 dimensional/performance requirements
• Parflange non-welded/cold formed tube forming process
• Zero clearance connection – no wedging/prying
• Cold formed tube nut
• Specific Gas Tight / OEM Sealing Attributes:
• Assemble by Torque
• Zero clearance connection
• Highly repeatable assembly without component or fitting damage
• Elastomeric sealing
• Ultimate resistance to mechanical shock and vibration
• High retained assembly torque for optimum resistance to vibration and loosening
• Robust design, exceeds HGV3.1 design factor (significantly greater than 2.5:1)
Parflange Tube Forming Process
• 90° tube forming process (1992)
• Incrementally forms tube to polished 90° surface while attaching nut shoulder/bearing surface
• Unlimited reusability
• Meets requirements of HGV3.1/EC79
• HGV3.1 compliant
• Parker and numerous tube fabricators established
• Additional stainless steel/H2 tube prep requirements for high-pressure H2 service
| Brand | Parker |
| Fuel | Hydrogen |
| Max Pressure (in bar) | 700 |
| Manufacturing Readiness (MRL) | 1 |
| Technology Readiness (TRL) | 1 |
| Compliant with | EC79 and HGV 3,1 |
| Max Ambient Temperature (in °C) | 85 |
| Min Ambient Temperature (in °C) | -55 |
Parker Hannifin
Parker Hannifin is a Fortune 250 global leader in motion and control technologies. For more than a century the company has been enabling engineering breakthroughs that lead to a better tomorrow. Parker is supporting the global decarbonisation efforts through a broad range of solutions, hydrogen-compatible components and systems enabling safe and efficient operation for a variety of applications.
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