Flow channel port surface structure of high flow coefficient valve body

The invention relates to a flow channel port surface structure of a high flow coefficient valve body, being a port surface structure of a flow channel formed in the valve body. The cross-section shapeof the flow channel port of the flow channel is of a bilateral symmetrical structure, the cross section of the flow channel port of the flow channel is wide at the upper end and narrow at the lower end, and the corners of the cross section of the flow channel port of the flow channel are cambered. The flow channel structure of the valve body is optimized. The flow channel structure has no dead angle which is possible to deposit a medium, and therefore the flow capacity of the valve is increased. Meanwhile, based on the optimization of the flow channel structure, the sealing area of the part needing to be sealed of the valve is increased, and the safety and reliability of sealing of the valve are improved. The valve body structure eliminates a pressure relief groove in the sealing surfaceof the valve body, and the