Yoshitake is engaged in the manufacture and sale of automatic pressure-regulating valves. Co.'s products include pressure reducing valves, drain separators, safety and relief valves, strainers, solenoid valves, motor valves, air departed valves, temperature regulators, steam traps, radiator products, primary pressure regulating valves, expansion joints, flexible joins, sight glasses, air vents, air outs, noiseless heaters, vacuum relief valves, and fluid control products, among others.