Description
Parker’s two ferrule compression fittings, A-LOK® Reducing Union Tube Fittings are designed to provide reliable leak-free connections for instrumentation, process and control, and analyzer applications that specify a two ferrule tube fitting connection. Manufactured to the highest quality standards these tube fittings are available in a broad range of sizes, corrosion resistant materials and configurations.
As standard, Parker’s A-LOK® Reducing Union Tube Fittings are manufactured from heat code traceable 316 stainless steel. Other materials include 6Mo, Alloy 825, Alloy 625 and Alloy C-276.
The fittings are available for fractional pipe sizes from 1/8” through to 1” O.D., and for metric sizes from 3 mm through to 25 mm O.D.
Technical Specifications
Brand: A-LOK
Configuration: Tube to Tube (Union)
Product Style: Reducing Union
Shape: Straight
Connection 1 Size: 1/8 to 1 inch Tube O.D., 3 to 25 mm Tube O.D.
Connection 2 Size: 1/16 to 3/4 inch Tube O.D., 2 to 20 mm Tube O.D.
Materials of Construction: 316 Stainless Steel, Steel, 6Mo, Alloy 625, Alloy 825, Alloy C-276, Monel 400, Titanium, 316L Stainless Steel
Specifications Met: EC 79, NORSOK M650, NACE
Operating Pressure: 2400 to 10900 psi
Minimum Operating Temperature: -255 °C
Maximum Operating Temperature: 649 °C
For Fluid Type: Liquid, Fuels, Oil, Corrosive, Gases, Natural Gas (CNG), Hydrogen, Steam, Petroleum Hydraulic Fluids (Oil)
Length: 1.21 to 2.39 inch, 35.8 to 62.3 mm
Technology: Process Control
Application: Instrumentation, Analytical Installations, CNG / LNG Lines, Hydrogen Service, Offshore Control Panels, Sensing Lines, Research Labs
Industry: Semiconductor, Microelectronics, Chemical, Petrochemical, Transportation, Power Generation, Nuclear, Oil & Gas
Features/Benefits:
• Wide range of Corrosion Resistant Alloys available
• EC79 Approved for Hydrogen Service
• Parker Suparcase™ surface treatment process for superior material hardening
• Hardened ferrules provide leak free connections
• Silver plated nuts provide gall resistance during makeup
Applications:
• Instrumentation Hook-up Systems
• Analytical Installations
• CNG / LNG Lines
• Hydrogen Service
• Offshore Control Panels
• Sensing Lines








