Alfa Laval 45BY-4-02-U Check Valve Buna Ball

Alfa Laval 45BY-4-02-U Check Valve Buna Ball is a Tri-Clover Y-body ball check valve from the Alfa Laval 45BY family. The "U" suffix denotes a Buna N (NBR) ball in the check assembly, paired with Buna gasket components for hygienic service. Designed for Tri-Clover clamp connections, it enables forward flow with minimal resistance while preventing reverse product flow in sanitary stainless piping. Alfa Laval's literature shows 45BY check valves are offered in sizes from 1.5" to 3" (tube OD 38.1 mm to 76.2 mm). In the 45BY portfolio, variants are shown with 316L bodies (45BYMP), underscoring the steel construction used in clean processes; standard Buna-ball variants like this model are specified for use in dairy, beverage, pharmaceutical and other CIP/SIP environments. Replacement check balls and gaskets are available for Buna-ball 45BY valves, ensuring service continuity without substituting materials. The 45BY family is described as a reliable one-way valve with low pressure drop and compatibility with Tri-Clover fittings and clean-in-place processes.