Introduction of gate valve parts
The structure of the gate valve body determines the connection between the valve body and the pipeline, and the valve body and the valve cover. The valve body blank can be cast, forged, forged welded, cast welded and tube sheet welded. Cast valve body is generally used for diameter ≥ DN50, forged valve body is generally used for diameter ≤ DN50, forged valve body is used for valves that have difficulties in the overall forging process and is used in important occasions, cast and welded valves For those that cannot meet the requirements of integral casting, the cast-welded structure can be used.
②The valve cover is connected with the valve body and forms the main pressure-bearing part of the pressure chamber with the valve body, and there is a stuffing box on it. For medium and small diameter valves, the valve cover is provided with a mechanism to support parts such as stem nut or transmission.
③The bracket is connected with the valve cover and is used to support the valve stem nut or the parts of the transmission device.
④The valve stem is directly connected with the valve stem nut or the transmission device, and the polished rod part forms a sealing pair with the packing, which can transmit torque and play the role of opening and closing the gate.