Valves, in an industrial context, refer to mechanical devices used to control the flow of liquids, gases, or slurries within a system. They are not a single brand but a broad product category manufactured by various companies globally. For example, brands like Emerson (USA), Siemens (Germany), and Kitz (Japan) produce valves for industries such as oil & gas, water treatment, and manufacturing. Valves can include types like ball valves, gate valves, and butterfly valves, serving critical functions in pipeline systems and machinery. Companies like Grainger (USA) and Radwell (USA) distribute these products as part of industrial supply chains.