NACOL Company Profile

The definitive solution for energy saving! Manufacturing and sales of hydraulic and water pressure accumulators, spring safety valves, and stop valves.

Our company developed the first bladder-type accumulator in Japan in 1958. Since then, we have achieved high longevity and high performance through the development of maintenance-friendly upper decompression, upper assembly, and upper inspection type accumulators, as well as the adhesive-free integrated manufacturing of bladders (rubber bags) and pleated structural design. Additionally, as a technology development-oriented company, the vast know-how cultivated through our in-house production is demonstrated by the acquisition of over 190 industrial property rights (patents and utility models) and more than 80 overseas patents. Our corporate philosophy is "Health and Safety," which extends beyond just our customers and employees to their families and local residents. We are committed to ensuring customer safety through a robust quality assurance system certified by ISO 9001 and recognized by the Ministry of Economy, Trade and Industry, as well as factory certifications from the United States, the EU, and China. An accumulator is a hydraulic energy storage device that gradually accumulates small amounts of energy and converts it into large power instantaneously. Therefore, it is used as an energy-saving device in various industrial machinery such as steelmaking equipment, hydraulic excavators, and injection molding machines, as well as for shock and pulsation absorption in fluid piping within oil and chemical plants, among a wide range of applications.