"Do our best" everyday from a new departure point. Excellent products come from "excellent human resources." Mihana knows the severity and joy of manufacturing.

No leakage after 100 operation tests !!
Traditionally, it was taken for granted that safety valves always leaked when they operated and the maximum allowable leakage was specified by domestic and foreign standards. To conquer this practice, we developed a special technology and challenged a safety valve operation durability test for the first time in the industry. We received a certificate that our safety valves did not leak, even after one hundred operations. Our achievement attracted a great deal of attention in Japan and was reported in the newspapers.

Mihana's proprietary technology assures that no preliminary leakage occurs in our safety valves. This means that leakage begins at the same time as a blowout. This phenomenon is the one that all safety valve manufacturers worldwide want, but failed to achieve. We made this splendid achievement for the first time in the world.

It is no exaggeration to say that the the seat lapping technology is the most important for the valve. Since Mihana Seisakusho was established, our lapping technology has always been at the top in the industry. We are actively working on research and development in many fields to further develop this technology.