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These ISO to ASA adapter reducer vacuum fittings follow International Standards Organization (ISO) and ASA/ANSI standards. They have a flange sizes of NW-63 to ASA/ANSI 1.5 inch. ISO LF flanged vacuum fittings are commonly used to build process vacuum plumbing and systems for industrial applications. The fittings are quick to assemble using double claw or single clamps and a centering ring. This ASA/ANSI flange side has NO O-Ring Groove.

The primary dimension of the ASA/ANSI flange is the Outer Diameter O.D. whether the term ASA or ANSI is used. The centering ring for the ISO side requires a rubber/elastomeric o-ring for vacuum. The ISO standard sizes for large flanges are NW-63, NW-80, NW-100, NW-160, NW-200, NW-250, NW-320, NW-400, NW-500, NW-630. These vacuum flanges are made of stainless steel. 

Adapter, NW-63 to ASA 1.5 in. Vacuum Fittings, ISO-LF Flange Size NW-63 to ASA 1.5 in., Stainless Steel

ISO-LF Flange Size: NW-63 to ASA 1.5" Without O-Ring Groove

Common Dimensions: 

A = 4.18"(106mm) 

B = 2.37"(60mm) 

C = ASA/ANSI O.D. 5.00"(152mm)