It adopts a sleeve guide structure and pressure-balanced valve core designed for heavy load conditions. It adopts a double valve seat seal and is used on occasions where leakage requirements are not high. The valve body has a compact structure and the fluid channel is S streamlined. There is a guide vane to improve the balanced flow of fluid around the sleeve. The advantages are that the pressure drop loss is small, the flow rate is large, the adjustable range is wide, and the high flow characteristic accuracy. The valve core uses the pressure balance structure and can control high pressure and other working conditions through the light and small thrust of the actuator. It is widely used in fluid control of pipelines requiring good dynamic stability, high temperature, and high pressure. Cage guide, large guide area, good stability, and compact structure.