Hirose Valves Do a Thankless Job in an Environmentally-Friendly Way. At Hirose valve Industry Co., ltd., we are making efforts to develop and manufacture not only high-pressure hydraulic valves, but also novel fluid systems, all of which are friendly to the global environment, and we are preparing for what is coming in the future. With 90 years of experience in valve manufacturing and accumulated expertise and technology supported by an extensive business career, Hirose Valve ...