Parker 4SC4-316 Compression Tube Union 1/4 in Ss

Product Description

The PARKER 4SC4-316 is a compression tube union designed to join two sections of 1/4-inch outside diameter tubing with a compression-to-compression end connection. Machined from 316 stainless steel, this union delivers exceptional resistance to corrosion and high-temperature degradation, with a maximum working pressure of 10,300 psi and a rated temperature range from -425 degrees F to 1,200 degrees F. It is used in instrumentation, hydraulic, and process-fluid tubing systems where leak-free, high-integrity tube joints are required. Licensed plumbers, pipefitters, and instrumentation technicians are the primary installers of this fitting.

This union is suited for demanding industrial and commercial applications including chemical processing, oil and gas instrumentation lines, high-pressure hydraulic circuits, and cryogenic service given its extreme low-temperature rating. The compression-by-compression configuration allows inline tube connection without welding or soldering, making it practical for field assembly and service. Systems carrying high-purity fluids, corrosive media, or extreme-temperature process gases benefit from the 316 stainless construction.

Key Features

• 316 stainless steel construction resists corrosion in aggressive media and elevated-temperature environments
• Compression x compression end connections allow tool-assisted, no-weld tube joining
• Rated to 10,300 psi maximum working pressure for high-pressure instrumentation and hydraulic service
• Wide temperature range from -425 degrees F to 1,200 degrees F covers cryogenic through high-heat applications
• 1/4-inch tube outside diameter sizing fits standard small-bore instrumentation tubing

Compatibility

Designed as an OEM-style replacement or direct-fit union for 1/4-inch outside diameter compression tube systems requiring stainless steel construction and NPT-standard fittings.

Installation Notes

Installation should be performed by a qualified pipefitter, plumber, or instrumentation technician in accordance with applicable codes such as ASME B31.3 for process piping. Depressurize and isolate the tubing system fully before disassembling or installing any compression fitting. Use the appropriate tube preparation tools, including a deburring tool and tube cutter, to ensure a clean square cut before seating the ferrule. Do not overtighten compression fittings, as this can deform ferrules and compromise the seal.