Gate valves are classified as either rising or non-rising stem valve. A non-rising stem valve has its stem threaded on the lower end into the gate. Gate valves are available in a threaded or flanged gate valve design
The design of gate valves makes them ideal for the free flow of fluid when minimum restriction is desired. When a gate valve is wide open, the gate is completely drawn up into the valve body, allowing for pressure and flow through the valve that is consistent with the attached pipe
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