Parker 4-4 Hbz-ss Compression Tube Union Stainless Steel

Product Description

The PARKER 4-4 HBZ-SS is a compression tube union designed to join two compression-end tubing runs in a single inline fitting. Constructed from stainless steel, this union provides a strong, corrosion-resistant connection rated for working pressures up to 10,300 psi. The compression x compression end configuration allows for tool-assisted, leak-tight assembly without welding or soldering. It is suited for instrumentation, hydraulic, and fluid transfer lines where material compatibility and high-pressure performance are required. Licensed plumbers, pipefitters, and instrumentation technicians typically install this fitting in industrial, commercial, or mechanical system applications.

This union fitting is appropriate for use in high-pressure tubing systems where stainless steel is specified for corrosion resistance or cleanliness requirements. Typical applications include pneumatic instrumentation lines, hydraulic control circuits, refrigeration tubing connections, and chemical process piping. The compression end connections on both sides allow for straightforward field assembly into new or existing tube runs without special tooling beyond a standard wrench.

Key Features

• Stainless steel construction resists corrosion and withstands harsh service environments
• Compression x compression end connections on both sides for inline tube joining
• Maximum working pressure rating of 10,300 psi for high-pressure system compatibility
• No welding or soldering required for assembly
• Compact union design maintains tube alignment through the fitting

Compatibility

Designed as an OEM-style compression tube union for use in high-pressure tubing systems requiring stainless steel fittings with compression end connections on both sides.

Installation Notes

Installation should be performed by a licensed pipefitter, plumber, or qualified instrumentation technician in accordance with applicable codes such as the IPC or relevant ASME piping standards. Depressurize and isolate the tubing system fully before disassembling any existing connections or installing this fitting. Use two wrenches when tightening compression fittings to prevent tube twist and avoid over-tightening, which can deform the ferrule and compromise the seal. Verify tube end squareness and deburr cut tube ends before assembly to ensure a proper compression seal.