Flow valve filters, also known as strainers or inline filters, are components designed to protect sensitive equipment in a fluid system. Their purpose is to capture and remove solid particles like dirt, rust, and scale from a fluid or gas stream. By doing so, they prevent damage, clogging, and wear on downstream components such as valve seats, pumps, meters, and nozzles. These filters are not valves themselves, but rather essential protective components that ensure the longevity and reliable operation of flow control systems.