【BRASS CHECK VALVE】 It is a valve that relies on spring spring force and medium pressure to prevent the return flow of medium. Only one item of media is allowed to flow in one direction, preventing media backflow. 【EXPLOSION-PROOF, WEAR-RESISTANT】 The all-brass valve body has the characteristics of pressure resistance, explosion-proof, high temperature resistance and durability. Uniform wall thickness, high wear strength, long service life and good check effect. 【NOT EASY TO SCALE】 The inner wall of the brass check valve is polished, all copper is made, the surface is smooth, no scaling, no blockage, practical and durable. 【WIDE APPLICATION】 A variety of specifications are available, suitable for most piping systems. Widely used in chemical, construction, petroleum, light and heavy industry, fire protection, electric power, water power, aerospace, shipbuilding... 【NOTE】Applicable temperature: 13°F≤T≤249°F, flow direction: unidirectional, medium range: water, oil, non-corrosive flammable gas. Please refer to the size chart on the product detail page to select the appropriate size check valve. It is a valve that relies on spring spring force and medium pressure to prevent the return flow of medium. Only one item of media is allowed to flow in one direction, preventing media backflow.