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  3. ドゥ・ヤマモト 本社
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ドゥ・ヤマモト 本社

addressTokyo/Koto-ku/Kameido 2-34-4
phone03-3682-8116
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last updated:Jun 25, 2025
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ドゥ・ヤマモト List of Products and Services

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High-pressure hose High-pressure hose
General-purpose tube and hose General-purpose tube and hose
Joint Joint
Rubber products Rubber products
Resin products and metal processed products. Resin products and metal processed products.
Hose coupling crimping machine Hose coupling crimping machine
Oil purifier Oil purifier
Joint

Joint

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Couplings: "Coupler, Hose Adapter, Swivel Joint, Pipe Fittings, etc."

We offer a wide range of high-quality products made in Japan, including couplers, hose adapters, swivel joints, and piping fittings.

Couplings, hose adapters, swivel joints, etc. With over half a century of experience, we select and provide products that meet our customers' needs using our extensive knowledge and know-how. In terms of hose adapters, we offer various materials for stainless steel adapters and can also accommodate the production of shapes that are not available on the market. Additionally, even for seemingly impossible short delivery times, please feel free to consult with us. 【Product Lineup】 ■ Couplings ■ Hose Adapters ■ Swivel Joints ■ Pipe Fittings ■ Hose Clamps *For more details, please download the PDF or feel free to contact us.

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Coupling Catalog

Introducing a wide variety of couplings, air dusters, hoses, and more!

The "Coupling Catalog" is a catalog that introduces products such as couplings, air duster guns, and air hoses in a list format. It includes various products such as the hose attachment socket and hose attachment plug for the "BLY type general-purpose coupling," as well as the male thread attachment socket and female thread attachment socket for the "BLK one-push coupling." [Featured Products (Excerpt)] ■ BLY type general-purpose coupling ■ BLK one-push coupling ■ BLK-SA type sleeve guard one-push ■ BLK type one-push lock ■ BLY type coupling with flow adjustment *For more details, please refer to the PDF document or feel free to contact us.

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[Authentic Product] Hose/Fitting Blow-off Prevention Wire 'Whip Check'

Easily detachable without using tools! Prevents the hose from blowing off.

"Whip Check" is a hose blow-off prevention wire manufactured by WHIPCHEK. In recent years, there have been frequent accidents caused by hose coupling failures in plant equipment construction, and various plant companies have made it mandatory to secure hoses together as a safety measure, rather than relying solely on the couplings. This product allows for easy attachment and detachment without the use of tools by securing hoses connected at the couplings with wire. We also offer types that secure hoses to machines, such as compressor nozzles. [Product Lineup] ■ Hose to Hose ■ Hose to Machine * This product is the only one manufactured by WHIPCHEK that has obtained a unique patent. Please be cautious of similar products. * For more details, please refer to the PDF document or feel free to contact us.

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Stub end (lap joint)

No welded joints, reducing the cost of non-destructive testing. Easy positioning of bolt holes.

Our company offers 'Stub Ends (Lap Joints)' that eliminate welding points through flare processing. In addition to reducing the non-destructive testing process after welding, it simplifies the positioning of bolt holes since there is no welding with loose-type flanges. It is also possible to combine stainless steel piping with iron-plated flanges, which helps in reducing total costs. 【Features】 ■ Flare-processed products with no welding points ■ No concerns about the positioning of bolt holes ■ Reduces costs for non-destructive testing *For more details, please refer to the materials. Feel free to contact us as well.

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Dry Disconnect Coupling

Easy to handle! Designed to maximize flow using computational fluid dynamics (CFD)!

The "Dry Disconnect Coupling" allows for secure connections with just a 45-degree turn, without the need for special tools, making it a highly reliable product for the transportation of LNG and cryogenic gases. All materials used are premium grade, suitable for cryogenic temperatures. Additionally, maintenance and replacement of sealing consumables can be done easily. 【Features】 ■ Can be manufactured without welding ■ Designed to withstand harsh environments, ensuring safe use ■ Enables easy and safe connections for loading and unloading ■ Enhances the safety and efficiency of workers ■ Built-in valve automatically opens and closes to protect workers from hazardous fluids *For more details, please refer to the PDF document or feel free to contact us.

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Couplings for LPG / LNG / Ammonia

Couplings for LNG, LPG, and ammonia. They are characterized by easy installation and removal, with minimal leakage during disconnection.

The "Dry Disconnect Coupling" allows for a secure connection with just a 45-degree turn, without the need for special tools, making it a highly reliable product for the transportation of LNG and cryogenic gases. All materials used are premium grade, suitable for cryogenic temperatures. Additionally, maintenance and the replacement of seal consumables can be done easily. 【Features】 ■ Can be manufactured without welding ■ Designed to withstand harsh environments, ensuring safe use ■ Enables easy and safe connection for loading and unloading ■ Improves worker safety and efficiency ■ Built-in valve automatically opens and closes to protect workers from hazardous fluids *For more details, please refer to the PDF document or feel free to contact us.

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WHIPCHEK

We also have types that connect the hose and machine, such as compressor nozzles!

We would like to introduce the WHIPCHEK wire from WHIPCHEK Inc. (U.S.), handled by Du Yamamoto Co., Ltd. This product allows for easy attachment and detachment of hoses connected by fittings without the use of tools, by securing them with wire. Additionally, we also offer types that bind hoses to machines, such as nozzles for compressors. 【Features】 ■ Easy attachment and detachment without tools ■ Types available for binding hoses to machines ■ Maximum operating pressure of 200 PSI *For more details, please download the PDF or feel free to contact us.

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Easy connection with one touch. Disconnect and connect, done in an instant! BI-Coupler

The Bridgestone BI-Coupler allows for quick and reliable attachment and detachment of hydraulic piping. With a tool-free one-touch operation, it significantly improves work efficiency.

The "BI Coupler" is a fitting that allows for easy attachment and detachment of hydraulic and pneumatic piping, just like an electrical outlet. This enables the use of multiple attachments from a single pressure source and allows for the disassembly and assembly of large machinery. 【Features of the "BI Coupler"】 - One-touch attachment and detachment: Piping can be attached and detached with one touch, without the need for tools. - Labor-saving: It can be easily attached and detached even in tight spaces, contributing to labor savings. - Extensive lineup: We offer a wide range of series tailored to various applications, from the general high-pressure "EA, AA, MA, ED series" to the "EP series" with a residual pressure release mechanism, and the ultra-high pressure "JA series." *For more details, please download the PDF or feel free to contact us.

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Optimal for the rotating and swinging parts of high-pressure hoses! 'Swivel Joint'

Prevents twisting and protects the hose! Swivel joint for high-pressure hoses.

A "swivel joint" is a fitting used in piping sections where the swinging or rotation of high-pressure hoses is required. It prevents hose twisting and suppresses hose damage and deterioration, maintaining stable hose piping. 【Features of the "Swivel Joint"】 Prevention of hose twisting: It prevents hose twisting when not under pressure, extending the hose's lifespan. Compatible with various rotation types: There are three types: "JL type," which rotates 90° relative to a fixed axis; "JB type," which rotates parallel; and "JR type," which rotates on the same axis. You can select the optimal type according to your application. 【Usage Precautions】 Rotation under pressure is strictly prohibited: Rotating while pressurized can damage the connection and may cause the body and nose to separate, which is dangerous. Compliance with torque: Always adhere to the proper tightening torque when using. Confirmation of application: This product is developed for piping in hydraulic equipment using mineral-based hydraulic oil as the fluid. If used for other applications, please be sure to check the specifications.

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Conversion adapter that enables the conversion from overseas standard BSPP threads to JIS threads.

First appearance! For those struggling with converting overseas standard BSPP threads to JIS threads!

Are you having trouble connecting adapters or hoses for overseas machines? We have started handling adapters that enable conversion from ISO BSPP ports to JIS O-ring ports. 【Features】 - No sealing tape required due to O-ring specification - Easy direction adjustment even with elbows - Flexible size changes by combining adapters of different diameters - Maintenance is easy if you can connect domestic manufacturer hoses - Possible reduction in running costs Sizes available are G1/4, G3/8, G1/2, G3/4, G1, G1-1/4, and G1-1/2.

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