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Spring check valve is designed for installation on hydraulic and pneumatic pipeline networks and for passing the transported medium in only one direction (indicated by the arrow on the valve body). The transported medium can be compressed air, cold and hot water, and other liquids that are non-aggressive to the valve material. Dimensions, G1/2″3/4″1″1-4/4″1-1/2″A, mm33.5414557.566B, mm46.554.559.565.5 73Working pressure, barup to 40up to 40up to 35up to 30up to 27Minimum working pressure, bar0.05Minimum valve opening pressure differential, bar0.025 Working medium temperature range, ℃-20 ÷ +90Minimum valve closing pressure differential, bar0.05Average total service life, years15Body material Brass CW617N