FBEV-C R744control valve adopts innovative internal balance design to meet the application of R744 with high working pressure; It can also have the functions of expansion valve and solenoid valve. With large diameter and lightweight design, it can be directly applied to integrated valve island products. The soft sealing structure is adopted to further reduce the internal leakage to ≤ 50ml / min (@1MPa). The metal hard sealing improve the external leakage sealing performance, as well as the durability of the supercritical R744 conditions.