Types of cast iron valves The types of gate valves can be divided into wedge gate gate valves and parallel gate gate valves according to the sealing surface configuration. The wedge gate gate valves can be divided into: single gate type, double gate type and elastic gate type; parallel The gate type gate valve can be divided into a single gate type and a double gate type. According to the thread position of the valve stem, it can be divided into two types: open gate valve and dark gate valve.
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