The key factor is whether the machine is designed and principally used for processing milk or dairy products specifically. A pasteurizer engineered for milk, or a separator designed for cream, qualifies here. A general-purpose heat exchanger or pump used across multiple food industries would typically be classified under a broader food-machinery or industrial-machinery heading based on its design characteristics.

While CBP clearance does not require food-safety equipment certification, dairy processing facilities in the US must comply with FDA's Pasteurized Milk Ordinance (PMO) and applicable state dairy regulations, which specify equipment design standards (often 3-A Sanitary Standards). Importers should confirm that foreign-manufactured equipment meets these standards before purchase, as non-compliant equipment cannot be used in licensed dairy plants regardless of its import status.