Do you have any extremely old valves that you'd like to use a little longer? We also offer reverse engineering services!
Please feel free to consult us regarding the collection, maintenance, functionality restoration, regeneration, repair, modification, and more of various types of valves! We can consider maintenance for our company’s valves, as well as valves from unknown manufacturers and those from defunct manufacturers. Basic maintenance includes: incoming inspection (appearance, operation, pressure testing), disassembly, parts verification, processing work, assembly, pressure leakage testing, and shipping (we can also confirm your presence at each stage). The maintenance details can be finalized after confirmation during the incoming inspection and other checks. Please also consult us about non-destructive testing and inspections. We have many qualified personnel in-house. We can also create drawings from old products and parts. We will propose better services within the limited time available. Do not hesitate to contact us.
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basic information
【Maintenance Work】 ■ Repair and processing of hardened overlay areas such as valve bodies and valve box seating surfaces with Stellite, etc. ■ Replacement of seat rings in valve boxes ■ Repair, regeneration, and remanufacturing of valve components ■ Regeneration and reprocessing of the main body opening edges ■ Modification and finishing work using various machine tools ■ Modification and changes to operating systems, such as replacing old gears and motors ■ Conversion from manual to electric operation ■ Various non-destructive testing ■ Operational testing ■ Pressure testing and leakage testing And more * In principle, maintenance and servicing are limited to items that can be removed from the on-site piping and moved to our premises. We can also accept the dispatch of advisors, and if it is something that can be moved to our premises, we can assist with maintenance while receiving work instructions from our workers for joint operations. Please feel free to contact us.
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Applications/Examples of results
【Special Equipment Maintenance Examples】 ■ Manufactured by Nippon Casting Co., Ltd. ・PB Type Butterfly Stop Valve (From acceptance operation confirmation to seat part regeneration, new parts manufacturing, and replacement) ■ Manufactured by overseas manufacturers ・ Large Through Conduit Gate Valve, products over 10m in total length (Disassembly and parts maintenance, seat part buildup regeneration, vertical inspection) ■ Modification of products from defunct manufacturers ・ 30K-500A Manual Ball Valve (Reinforced with rib welding for seat distortion prevention, processed to achieve zero leakage) ■ Regeneration of parts from defunct manufacturers ・ Regeneration of seat parts without drawings by bringing in the body and valve body ・ Creation of drawings and regeneration or remanufacturing of equivalent parts based on actual items brought in And many more achievements are available. *Please feel free to contact us.
Detailed information
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Manufacturer's product: 2500-6 pressure seal gate valve maintenance SCS19A/seat part STL#6. Due to numerous cracks in the body seat and valve seat upon acceptance, after removing the hardened buildup, Stellite #6 was applied. Shipment confirmed zero seat leakage in the presence of the customer.
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Class 150, 54-inch, partition valve maintenance, valve box and valve body seat regeneration, zero leakage.
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Class 300K 1/4B Angle Globe Maintenance Parts Fabrication and Replacement
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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.