Detailed Product Description Features: 1)Prevents dirt from entering compressor 2)If the inside is jammed, the spilling valve will be opened automatically 3)Applied to various alloy for welding 4)Excellent corrosive resistance ability 5)Pressure reduction automatically when full liquid flow through 6)Full size of products series 7)When the refrigerant liquid flows along the direction of the arrow instructed on filter, the side spilling-valve will run its function. If it generates excessive pressure when flowing over parts, the side valve will be slightly opened to remain sufficient airflow to cold down the temperature of motor inside full-sealed compressor. The side valve will not be opened automatically direction of air absorption is conversed of arrow instructed on filter, regardless of how high pressure is, it will not opened automatically. At this moment, it needs one more repaired valve installed to test pressure data through from filter core to air-absorption assist valve. Letter of T illustrates there is access valve inside for this type of equipment. If the side valve can not run its function, please access valve to test pressure