GY43H, YSTF, Y-shaped strainer is the necessary equipment when use water-power controlling valves and the mechanism products which are precise and easily blocked. Normally, Y strainer is fixed in the entrance end of water-power controlling valves. It can prevent the grain impurity entering the channels, which can lead to blocking and make the valves and other equipment unavailable. Y strainer is in simple structure and with small fluid block, and can clean the sewage by itself without dismantling. Y strainer pull rod telescopic filter has the characteristic such as can adjust the fixing length and can be dismantled easily. It can set up the meshes quantity of strainer as per necessary. As a general rule, its filter screen should have 18 to 30 meshes for water, 40 to 100 meshes for steam, and 100 to 80 meshes for oil.