RFQ/X type high-performance three-way control valve has two configurations: converging and diverging. The valve plug adopts a cylindrical thin-walled structure with a "V" shaped throttling passage and side-guided valve plug. The three-way valve can replace two two-way valves and a three-way manifold in some applications. It is commonly used for two-phase regulation in heat exchangers and can also be used for simple ratio control.