Stable quality. Peace of mind with long-term support even after delivery.
As a certified manufacturer of high-pressure gas equipment, you can trust our quality. We manufacture cast steel valves in compliance with JPI standards and also meet JIS, ANSI/ASME, and API specifications. Our own cast materials are managed with quality control equipment, including flow and solidification simulation technology and RT facilities, and we primarily use materials from reliable domestic manufacturing partners. While we specialize in custom orders rather than mass-produced items, which may result in slightly longer delivery times, we also have products in stock with cast materials, so please feel free to inquire about short delivery options. 【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) * Please consult us regarding additional and special specifications such as jacket types, pressure seal types, counterweights, alumina treatment, and many standard specifications we offer. * For low flow valves, we can also perform fluid analysis and reflect it in the design. * If you have any questions or concerns about valves, please feel free to reach out to 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 molds, such as with foam molds. 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. For special materials like titanium, we may be able to accommodate through forging. (For titanium materials: we have a delivery record with 2500-6 BW control valves). - We sincerely apologize, but since we mainly produce made-to-order items, prices are estimated 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 products made from 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 / Sheet part Stellite #6 Lens ring type glove valve It is also compatible with flange type, butt welding type, etc. Please consult us regarding materials such as stainless steel, titanium, etc.
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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 old valves can be restored to functioning valves through processes such as reworking the seat area.
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 for over 70 years. We sincerely appreciate the warm support from all of you. 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 assistance to other companies in the same industry and valve maintenance. While many manufacturers are switching to overseas materials, we have continued to insist on domestic materials for our products since our founding, particularly selecting high-quality, stable cast steel materials for pressure-resistant parts. Even if materials that are difficult to obtain domestically are specified, we can procure the desired overseas 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 are in a hurry. If you have any concerns regarding valves, please feel free to consult with us.
