Parker 12 Klo-s Tube Union O-ring Face Seal 3/4 in 6000 Psi

Product Description

The PARKER 12 KLO-S is a compression tube union with an O-Ring Face Seal (ORFS) end connection, designed to join two tube runs in high-pressure hydraulic and fluid power systems. Constructed from steel, this union provides a leak-free metal-to-metal interface backed by an elastomeric face seal. It is rated for a maximum working pressure of 6000 psi and is sized for 3/4-inch outside diameter tubing. The threaded interface follows the UNF standard. Hydraulic technicians and pipefitters install this fitting in stationary and mobile hydraulic circuits where vibration resistance and reliable sealing are required.

The PARKER 12 KLO-S is suited for use in industrial hydraulic systems, mobile equipment fluid circuits, and heavy-duty plumbing applications where high-pressure tube connections must be maintained without leakage. The ORFS design makes it appropriate for installations subject to vibration or pressure cycling, where flare-type or NPT fittings may be less reliable. It is used by hydraulic technicians, maintenance mechanics, and fluid power specialists working on both original equipment assemblies and field repairs.

Key Features

• O-Ring Face Seal (ORFS) end connections for reliable, leak-free performance at high pressure
• Maximum working pressure of 6000 psi for demanding hydraulic applications
• Sized for 3/4-inch outside diameter tubing
• UNF thread standard for compatibility with standard hydraulic fittings
• Steel construction for strength and durability in industrial environments
• Union configuration allows in-line tube-to-tube joining without rotating either tube

Compatibility

Designed as an OEM-style replacement or service fitting for hydraulic and fluid power tube assemblies using 3/4-inch OD tubing with ORFS end connections and UNF threading.

Installation Notes

Installation should be performed by a qualified hydraulic technician or pipefitter. Depressurize and lock out the hydraulic system completely before removing or installing any fittings. Inspect the O-ring sealing face and the O-ring itself for damage before assembly, and replace the O-ring if any wear or deformation is present. Refer to the applicable system schematics and torque specifications provided by the equipment manufacturer for final assembly.