A-103: Only filtration materials that meet the 2004 standards will be shipped! "Okinawa gravel" is used as a substitute for river gravel.
"Filtration gravel" is extremely important not only for preventing filtration sand from entering the collection device but also for serving as a support layer and evenly performing backwashing (only in rapid filtration ponds). Our products are manually sorted to remove flat, fragile, and broken pieces, as well as shells, ensuring that we consistently ship high-quality rounded gravel. As a result, it is possible to maximize the effectiveness of the filtration material and minimize issues such as unevenness associated with filtration. 【Features】 ■ Inspected at our partner organization, Japan Filtration Sand Research Institute, before shipment ■ Only filtration materials that meet the A-103:2004 standard are shipped ■ "Okinawa gravel" is used as a substitute for river gravel ■ Sifting, washing, and foreign matter removal are performed to manufacture according to customer-specified sizes ■ An additional process to remove flat gravel, shells, crushed stone, and other foreign matter is included in the production process *For more details, please refer to the PDF document or feel free to contact us.
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basic information
【Quality Standards (Partial)】 <Physical Properties> ■ Cleaning Turbidity [degrees]: 30 or below ■ Density [g/cm3]: 2.50 or below in surface dry saturated condition ■ Hydrochloric Acid Solubility [%]: 3.5 or below <Leachability> ■ Taste: No abnormalities ■ Odor: No abnormalities ■ Color [degrees]: 0.5 or below ■ Turbidity [degrees]: 0.2 or below *For more details, please refer to the PDF document or feel free to contact us.
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For more details, please refer to the PDF document or feel free to contact us.
Company information
Our company is a water treatment manufacturer that has been working alongside Japan's water supply industry since its founding in 1939. We are committed to contributing to the resolution of all water-related issues with foresight and outstanding technological capabilities, regardless of whether it is for drinking water, wastewater, or stormwater, in order to ensure safe and secure water and to protect the environment. Please feel free to contact us if you have any inquiries.
