FIA 250-300 (10-12 in.) strainers are a range of angleway strainers, which are carefully designed to give favorable flow conditions. The design makes the strainer easy to install, and ensures quick strainer inspection and cleaning. FIA strainers are used ahead of automatic controls, pumps, compressors etc., for initial plant start-up and where permanent filtration of the refrigerant is required. The strainer reduces the risk of undesirable system breakdowns and reduces wear and tear on plant components. FIA 250-300 (10-12 in.) strainers are equipped with a screen mesh of stainless steel, available in sizes 150 and 250 (microns ⁽¹⁾), (US 100 and 72 mesh ()). ⁽¹⁾ Mesh is the number of threads per inch. μ (microns) is the distance between two threads (1μ = 1 /1000 mm)