Check valve, flange connection, specifications and models DN15~DN300

Check valve refers to a valve whose opening and closing part is a round valve disc and acts by its own weight and medium pressure to block the backflow of the medium. It is an automatic valve, also known as check valve, check valve, return valve or isolation valve. The motion mode of the valve disc is divided into lifting type and swinging type. Lift check valves are similar in structure to globe valves, except for the lack of a stem that drives the disc. The medium flows in from the inlet end (lower side) and flows out from the outlet end (upper side). When the inlet pressure is greater than the sum of the weight of the disc and its flow resistance, the valve is opened. Conversely, the valve is closed when the medium is reversed