Check function is used to prevent the line of medium back. Check valves are automatic valves, opening and closing pieces by the force of the flowing medium itself on or off. Check only for one-way flow of the pipeline medium, medium return stop to prevent accidents. The main performance parameters of the model PN Working pressure MPa Temperature ℃ applicable dielectric material body, bonnet gate valve rocker shaft, pin sealing surface H14T-16 1.6 1.6 ≤200 water, steam, carbon gray cast brass and brass main shape size DN LH Weight (kg) 15 65 43 0.5 20 75 48 0.9 25 90 57 1.2 32 105 72 1.4 40 120 78 2 50 140 94 2.76