Non Return Valve Suppliers China

Check valve refers to the opening and closing member for the circular valve and by its own weight and media pressure to produce action to block the backflow of the medium of a valve. Belong to the automatic valve category, also known as check valve, check valve, backflow valve or isolation valve. The valve movement is divided into lift and swing type. Lifting check valve and globe valve structure is similar, only the lack of driven valve valve stem. The medium flows in from the inlet side (lower side) and out from the outlet side (upper side). When the inlet pressure is greater than the sum of the weight of the valve flap and its flow resistance, the valve is opened. Conversely, the valve closes when the medium flows backwards.