A Flange gate valve is a conventional gate valve that includes a pair of integral flange plates on the ends of the valve body. This allows the valve to be added to existing pipe flanges in a standardized system with minimal effort. A gate valve is a type that features a circular disc that is lifted or dropped within a close-fitting chamber to allow or restrict the flow of fluid through the valve. The flange plates are typically round, flat plates mounted at right angles to the fluid flow path at either end of the valve body. These plates are equipped with a row of holes around their circumference through which mounting bolts are inserted.
The gate valve is a member of the multi-turn valve family and one of the most commonly used valve types in a host of industries. They consist of a round, flat disc, or gate, which is attached to a threaded lead screw type valve stem. At the bottom of its travel, the disc closes off the flow of fluid through the valve chamber. When the valve stem is turned, the valve gate rises to open the flow path.