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In the maintenance of overseas equipment operating in domestic factories and construction sites, the biggest obstacle is the "difference in screw standards." Standards unique to overseas (such as ISO/BSPP) are difficult to obtain domestically, and there are many cases where one has to endure high shipping costs and several weeks of line stoppage just to procure a single part from the home country. The "conversion adapter" provided by Du Yamamoto is a revolutionary product that instantly converts these overseas standards to the commonly used "domestic standards (such as JIS)" in Japan. This allows for the use of readily available general-purpose hoses and fittings in the country, enabling the restoration of machinery on the same day without waiting for parts to arrive. We maintain a constant stock of major sizes at our headquarters warehouse in Koto, Tokyo, and have established a system for same-day shipping at the earliest. In 2026, we will continue to support significant reductions in downtime in the maintenance of overseas machines as a partner in creating "unstoppable sites."

In the repair of overseas equipment, not only the differences in standards but also the "difficulty of work" pose challenges. The Do Yamamoto conversion adapter series features three characteristics that reduce the burden on the site. 1. Reliable sealing without technical skills: Adopting the "O-ring port" that seals with a rubber gasket (O-ring) instead of sealing tape. Regardless of the worker's experience, the risk of leakage can be minimized, no matter who installs it. 2. Direction adjustment in tight spaces: A lineup of models that can be adjusted to any direction after connection, even in the tight piping spaces of overseas machines. 3. Reduced running costs: Once converted to domestic standards, inexpensive domestic general-purpose products can be used for subsequent repairs, leading to reduced maintenance costs. As a specialized company in industrial hoses established in 1959, we solve all "disconnections" under strict quality control. If you are troubled by deficiencies in hydraulic piping for overseas machine tools, construction machinery, etc., please feel free to consult us.

In Japan's manufacturing and construction sites, measures against the breakage and detachment of hydraulic hoses are required by JIS B 6711. However, are we fully prepared for the "whip effect," which can cause violent movements when hoses are damaged or detached? In response to this risk, which can lead to personal injuries and equipment damage, Du Yamamoto, as a specialized trading company, points out the most critical issues on-site and emphasizes the necessity of reliable safety solutions. We will explain the dangers of the whip effect and the importance of compliance with JIS standards.

We have started domestic stock sales of the safety wire "STOPFLEX," which protects lives and equipment from the whip effect of high-pressure hoses. It can handle up to 45 MPa and has a simple structure that allows for easy retrofitting to existing equipment. With the start of stock sales, we can now quickly supply sites that require urgent safety measures. As a specialized trading company for hydraulic hoses, we provide one-stop support from optimal hose selection to the supply of safety measure components.

Du Yamamoto also handles WHIP CHEK for air (compressed air) hoses, in addition to STOPFLEX for hydraulic hoses. We can propose optimal safety solutions tailored to fluids and environments in a one-stop manner. With our high technical capabilities as a Bridgestone certified factory, top-class domestic inventory, and rapid assembly capabilities at our own factory, we strongly support the continuity of our customers' businesses.