👉 A process fluid, also known as working fluid or medium, is a substance used in industrial processes to transfer energy, heat, or mass between different parts of a system. It can take various forms such as liquids, gases, or even slurries and can be tailored to meet specific process requirements. The fluid's primary role is to facilitate chemical reactions, heat exchange, or material transport, ensuring efficient and controlled operation of machinery and processes. Common examples include water, steam, oils, and various chemical solutions, each chosen based on the process's needs for temperature, pressure, and compatibility with materials involved.