ACH800 axial flow check valve is a high-performance check valve designed according to API 6D and ASME B16.34. In addition to the functions of a general check valve, it also uses exquisite sealing technology to achieve zero leakage. The unique Venturi streamlined flow channel design has the advantages of low flow resistance, good flow state, fast response speed to medium pressure changes, and small external dimensions. It is the preferred valve for general industrial and pipeline use, especially suitable for oil pump outlets and natural gas compressor outlets.