Parker 6 Hlo-s Tube Union Orfs Steel 3/8 in 9200 Psi

Product Description

The PARKER 6 HLO-S is a compression tube union with an O-Ring Face Seal (ORFS) end connection, manufactured from steel. It is designed to create a leak-free connection between two lengths of tubing in hydraulic and fluid power lines. The fitting accommodates 3/8 inch outside diameter tubing and is rated for a maximum working pressure of 9200 psi. The UNF thread standard ensures dimensional conformance with standard hydraulic fittings. Licensed plumbers, pipefitters, and hydraulic system technicians are the primary installers of this type of fitting in industrial and mobile equipment applications.

This union fitting is suited for high-pressure hydraulic circuits, fluid transfer lines, and instrumentation tubing runs where a reliable, vibration-resistant connection is required. The ORFS design uses a flat face with an O-ring groove to eliminate leak paths, making it a preferred choice in applications where standard tapered thread fittings are not acceptable. It is appropriate for both stationary industrial equipment and mobile hydraulic systems.

Key Features

• O-Ring Face Seal (ORFS) end connections provide a positive leak-free seal at high pressure
• Maximum working pressure rated at 9200 psi for demanding hydraulic service
• Accepts 3/8 inch outside diameter tubing on both ends
• UNF thread standard for compatibility with standard hydraulic hardware
• Steel construction for durability in industrial and mobile equipment environments
• Single-piece union design joins two tube ends in-line without special tooling

Compatibility

Designed as an OEM-style replacement or new-installation fitting for high-pressure hydraulic and fluid power tubing systems using 3/8 inch OD tubing with ORFS end connections and UNF threads.

Installation Notes

Installation should be performed by a qualified pipefitter, hydraulic technician, or licensed plumber following applicable system pressure and fluid compatibility requirements. Depressurize and isolate the hydraulic circuit completely before disassembling or installing any fittings. Inspect the O-ring seating surface for nicks or contamination before assembly, and replace the O-ring if any damage is present. Refer to the system manufacturer guidelines and applicable fluid power standards for proper assembly procedures.