Socket type soft sealing gate valve is also called socket type soft sealing gate valve. The main feature of socket type soft sealing gate valve is to set two sockets at both ends of the valve, which form socket connection between the socket and the tube, that is, to insert the tube directly into the socket, which is very convenient to install, and to place rubber sealing ring between the tube and the socket to achieve sealing. This kind of connection is different from flange connection, which is called flexible connection or stress-free connection. Its advantage is that it allows the pipeline to have a proper expansion at the joint with the socket, which can compensate for the length change of the pipeline and eliminate the material stress caused by the thermal expansion and cold contraction of the pipeline, so as to achieve the purpose of protecting the pipeline.