Guyan International is a family-owned business based in Barboursville, West Virginia. Its wholly owned subsidiaries include Permco, Inc.; Permco (Tianjin) Hydraulic Inc., Ltd.; and Permco Tianjin Fluidpower Manufacturing Co., Ltd. These companies manufacture high-pressure hydraulic pumps, motors, and auxiliary products for mobile hydraulic applications in the mining, agricultural, industrial, construction, waste disposal, and energy industries in more than one hundred countries.
