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The PARKER 12-6 TRLON-S is a compression-style tube end reducer with an O-Ring Face Seal (ORFS) end connection, manufactured from steel. It reduces a 3/4-inch outside diameter tube connection down to a 3/8-inch outside diameter, making it a compact inline transition fitting for hydraulic and fluid-handling lines. Rated to 6000 psi maximum working pressure, this fitting is built for high-pressure service where leak-free performance is critical. The ORFS interface provides a positive metal-to-metal face seal backed by an elastomeric O-ring, eliminating the leak paths common to flare-style fittings. Thread standard is UNF. Weight is 0.15 pounds.
This fitting is suited for hydraulic systems, mobile equipment, industrial machinery, and fluid power circuits where tube size reduction is required in a high-pressure line. It is commonly installed by hydraulic system technicians, millwrights, and field service personnel working on equipment that runs steel tubing with ORFS-style plumbing. Typical applications include pressure lines on construction equipment, agricultural machinery, and industrial power units where reliable tube-to-tube size transitions are needed.
Designed as an OEM-style replacement or new-installation tube end reducer for high-pressure hydraulic and fluid power lines using O-Ring Face Seal (ORFS) fittings with UNF threads and steel tubing of 3/4-inch and 3/8-inch outside diameter.
Installation should be performed by a qualified hydraulic technician. Depressurize and isolate the hydraulic circuit completely before removing or installing any fittings. Inspect the O-ring seating face for nicks or contamination prior to assembly, as surface damage will compromise the seal. Torque the fitting according to the equipment manufacturer or ORFS fitting specifications using calibrated torque tooling — do not rely on feel alone for high-pressure hydraulic connections.
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