Parker 12-8 Hbz-ss Compression Tube Union 3/4x1/2 Ss

Product Description

The PARKER 12-8 HBZ-SS is a stainless steel compression tube union designed to join two tubes in a straight-run configuration using compression-style end connections on both sides. This fitting accepts a 3/4-inch outside diameter tube on one end and a 1/2-inch outside diameter tube on the other, making it a reducing union suited for systems that require a step-down in tubing size without threaded connections. It carries a maximum working pressure of 5800 psi, making it appropriate for high-pressure fluid and gas lines. Plumbers, pipefitters, and mechanical contractors install this type of fitting in instrumentation, hydraulic, and process piping systems where leak-free, reusable connections are required.

This fitting is used in residential and commercial applications where stainless steel construction is specified for corrosion resistance or compatibility with aggressive media. Common install scenarios include instrument tubing runs, compressed air lines, chemical distribution systems, and OEM equipment assemblies. The compression-by-compression configuration allows field installation without soldering, brazing, or special tooling, which makes it practical for service and maintenance work as well as new construction.

Key Features

• Stainless steel construction provides corrosion resistance for demanding fluid and gas service
• Compression x compression end connections on both sides — no soldering or brazing required
• Reducing union joins 3/4-inch OD tube to 1/2-inch OD tube in a single fitting
• Rated to 5800 psi maximum working pressure for high-pressure system applications
• Reusable fitting design supports service and maintenance disconnects

Compatibility

Designed as an OEM-style compression tube union for instrumentation, hydraulic, and process piping applications using 3/4-inch and 1/2-inch outside diameter tubing with compression-style connections.

Installation Notes

Installation is performed by qualified plumbers, pipefitters, or instrumentation technicians. Depressurize and isolate the line completely before disassembling any existing fitting or installing this union. Ensure tubing ends are cut square, deburred, and free of contaminants before seating into the compression fitting. Follow applicable IPC and ASME B31.3 guidelines for the service pressure and media involved.