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The PARKER 12 RBU-S is a flareless bite-type tube male run tee fitting designed for use in high-pressure hydraulic and instrumentation tubing systems. It accepts a 3/4-inch tube OD and connects to a 3/4-inch NPTF male thread port, providing an in-line branch connection without the need for flared tube ends. The bite-type design uses a ferrule that mechanically grips the tube on assembly, creating a leak-resistant metal-to-metal seal. This fitting is installed by licensed pipefitters, hydraulic technicians, and industrial maintenance professionals working on fluid power and instrumentation lines.
This fitting is suited for industrial fluid power systems, instrumentation lines, and process piping where a flareless connection is preferred over flared or compression alternatives. The male run tee configuration allows a branch takeoff while maintaining a straight through-run, making it useful in manifold-style plumbing and panel-mount installations. It is appropriate for both new construction and retrofit applications in industrial and commercial settings.
Designed as an OEM-style replacement or service fitting for flareless bite-type tube systems using 3/4-inch OD tubing and 3/4-inch NPTF ported components in industrial fluid power and instrumentation applications.
Installation should be performed by a qualified pipefitter or hydraulic technician familiar with flareless bite-type fitting procedures. De-pressurize and drain the system fully before removing or installing any fittings. Follow the fitting manufacturer's recommended number of turns past finger-tight for the ferrule bite during initial assembly. NPTF threads are designed as dry-seal connections, but verify local code requirements and system media compatibility before omitting thread sealant.
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