Stable quality. Peace of mind with long-term support after delivery.
As a certified manufacturer of high-pressure gas equipment, you can trust our quality. We manufacture cast steel valves that comply with JPI standards and also meet JIS, ANSI/ASME, and API specifications. Our in-house products use cast materials that are primarily sourced from reliable domestic manufacturing partners, supported by our own quality control equipment, including flow and solidification simulation technology and RT facilities. While we specialize in custom orders rather than mass-produced items, which may result in slightly longer lead times, we also have products available with stocked cast materials for shorter delivery times, so please feel free to inquire. 【Product Examples】 ■ Plug valves ■ Cock valves ■ Tilting check valves (1-piece type, 2-piece type) ■ Butterfly stop valves ■ Gate valves ■ Globe valves ■ Check valves (chack valves) * We also welcome inquiries about additional and special specifications, such as jacket types, pressure seal types, counterweights, alumina treatment, and many standard specifications available from our company. * For low-flow valves, we can perform fluid analysis to reflect in the design. * If you have any questions or concerns about valves, please feel free to consult us.
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basic information
【Valve Standards】 JPI, JIS, API, ANSI/ASME 【Pressure Classes】 JPI: Class 150 to 2500 JIS: Class 10K to 63K We have a track record of small-diameter forged needle valves up to 450K. 【Diameter Sizes】 Cast Steel 1-1/2 inches to 60 inches (40A to 1500A) - The applicable diameter may vary depending on the operating pressure. - We can accommodate even those without a mold using methods such as foam molding. Forged We also have many achievements for sizes below 1 inch (25A). *Consultation required (Y-type globe valves, swing check valves, etc., will be machined from forged block materials). 【Body Material】 Mainly cast steel products, including carbon steel, low-alloy steel, stainless steel, nickel alloy steel, etc. Please consult us. Special materials such as titanium can also be accommodated through forging. (For titanium materials: we have a delivery record with 2500-6 BW control valves.) - We sincerely apologize, but since we primarily produce made-to-order products, prices are quoted on a case-by-case basis, and we do not sell at fixed prices. *Please feel free to contact us.
Price range
Delivery Time
※We do not have finished product inventory, but we do have some products made with casting materials. Please feel free to contact us.
Applications/Examples of results
■Steelworks ■Seabed ■Oil refinery ■Petrochemical plant ■Power generation facilities such as thermal and hydroelectric ■Waste treatment facilities ■Oil storage bases, etc. for delivery to plants and similar facilities - Processing requests and OEM support from valve manufacturers - Support when maintenance companies cannot handle valve maintenance on their own *Please feel free to contact us.
Detailed information
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450k-40A Material S25C / Stellite #6 for the sheet part Lens ring type globe valve Flange type, butt-weld type, etc. are also available. Please consult us regarding materials such as stainless steel and titanium.
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Insert Chuck Currently available from 8 inches to 26 inches. Both the main body and sealing material will be selected according to the fluid. Please feel free to consult with us.
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Maintenance of a 56-inch butterfly stop valve. We also manufacture new products, but we can restore old valves to functioning condition through processes such as reworking the seat area.
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Company information
Manufacturing, repairing, and creating valves Nakamura Valve Manufacturing Co., Ltd. has been consistently engaged in valve manufacturing since its establishment in 1947 (Showa 22), walking alongside the development of Japan's petrochemical industry. We are approaching our 80th anniversary. We sincerely thank you for your warm support. Through the technology accumulated over many years of valve manufacturing, we contribute to the maintenance and development of the industrial infrastructure as a behind-the-scenes supporter. About 80% of our sales come from our own products, while the rest consists of assisting other companies in the same industry and valve maintenance. While many manufacturers are switching to overseas materials, we have continued to prioritize domestic materials for our products since our founding, particularly selecting high-quality cast steel materials for pressure-resistant components to ensure stable quality. Even if you require special materials that are difficult to obtain domestically, we can procure the requested materials in consultation with our customers. We manufacture and sell on a made-to-order basis, but we also have a small stock of materials for products that receive frequent inquiries. Please contact us if you need something urgently. If you have any concerns regarding valves, please feel free to consult with us.