👉 The gate fluid, also known as control fluid or pilot fluid, is a specialized liquid used in various industrial processes, particularly in gas processing and separation systems, to regulate the flow of gas through a valve or gate. It acts as a control mechanism by changing its volume in response to pressure differences, thereby opening or closing the valve to modulate gas flow. This precise control is essential for maintaining process efficiency, safety, and product quality in applications like natural gas processing, petrochemical refining, and air separation plants.