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  3. ダイコー 本社
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ダイコー 本社

EstablishmentJune 1984
capital1000Ten thousand
number of employees80
addressOsaka/Nishinari-ku, Osaka-shi/Nanjin Guard 4-4-12
phone06-6657-0374
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last updated:Dec 02, 2025
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有機溶剤・薬品・食品対応 有機溶剤・薬品・食品対応
Rubber products Rubber products
Resin products Resin products
緩衝・防音・断熱 緩衝・防音・断熱
金属 金属
Insulation-related products Insulation-related products
List of Our Brand Gaskets and Packing List of Our Brand Gaskets and Packing
紡績品 紡績品
水・油系流体 水・油系流体
電気絶縁 電気絶縁
建築用資材 建築用資材
蒸気・高温・高圧系 蒸気・高温・高圧系
バルブ・ポンプ・ボイラー用 バルブ・ポンプ・ボイラー用
排ガスダクト用 排ガスダクト用
その他 その他
Daiko Communication Daiko Communication
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導入事例 導入事例
Selection flow Selection flow
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スリーボンド スリーボンド
株式会社ダイコー 株式会社ダイコー
ニチアス株式会社 ニチアス株式会社
タイガースポリマー株式会社 タイガースポリマー株式会社
株式会社PILLAR 株式会社PILLAR
入間川ゴム株式会社 入間川ゴム株式会社
オーサカゴム株式会社 オーサカゴム株式会社
株式会社バルカー 株式会社バルカー
日本ゴア合同会社 日本ゴア合同会社
淀川ヒューテック株式会社 淀川ヒューテック株式会社
住友電工ファインポリマー株式会社 住友電工ファインポリマー株式会社
イノアックコーポレーション株式会社 イノアックコーポレーション株式会社
その他取り扱いメーカー その他取り扱いメーカー
株式会社ダイコー

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株式会社ダイコーのオリジナル製品について

Escape from asbestos gaskets! Criteria for selecting non-asbestos substitutes.

A thorough explanation of why asbestos gaskets were special and why a simple replacement is impossible!

Maintenance of machinery and equipment that has been in operation for many years. When I opened the flange after a long time, I found a deteriorated unknown gasket. Have you ever encountered such a situation? Moreover, it is not uncommon for that unidentified gasket to actually be an asbestos-containing gasket that was widely used in the past. Once celebrated as a "dream material" for its incredible heat resistance, chemical resistance, and durability, asbestos gaskets were active in various industrial fields. However, as the serious health hazards became clear, new manufacturing and use are now strictly prohibited by law. *For more details on the column, you can view it through the related link. For more information, please download the PDF or feel free to contact us.

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What are the causes and countermeasures of galvanic corrosion? | Effective methods to prevent dissimilar metal corrosion.

As the "foundation of measures against electrolysis," we will briefly explain "why electrolysis occurs" and "what effective countermeasures are."

"When stainless steel pipes were used with carbon steel bolts, only the bolts rusted excessively. In the case of dissimilar metal connections in seawater piping, one of the metals became severely corroded." Do you have any experience with such "abnormal corrosion" of metals? It may not just be rust, but rather "galvanic corrosion." Galvanic corrosion progresses locally through a mechanism different from normal corrosion, and if left unchecked, it can lead to leaks from the piping, a decrease in equipment strength, and in the worst case, serious accidents. *For more details on the column, please refer to the related link. For more information, feel free to download the PDF or contact us directly.*

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Metal Gasket Selection Guide | Sealing Materials for High Temperature, High Pressure, and High Vacuum

A thorough explanation of why metal gaskets made entirely of metal can achieve high sealing performance!

There are extreme conditions in the industrial world where the common knowledge of sealing materials does not apply at all. Ultra-high temperatures, ultra-high pressures, and ultra-high vacuum. To meet the supreme challenge of maintaining system airtightness under such conditions, the last bastion that exists is the 'metal gasket.' In this article, we will thoroughly explain why metal gaskets, composed solely of metal, can exhibit high sealing performance, their diverse shapes and principles, and the correct material selection and usage to fully harness their capabilities. *For detailed content of the column, please refer to the related links. For more information, feel free to download the PDF or contact us.

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Bulkar No. 8590 Series | Thorough Explanation of "Clean Tight"

A thorough explanation of why clean tights are commonly adopted as a standard in many utility lines!

"I want to choose a reliable gasket for the plant's steam and cooling water lines while keeping costs down." "The joint sheet cannot withstand it, but the highest performance graphite filler is over-spec." "Is there a spiral wound gasket that is easy to install and economical for medium and low-pressure piping?" To ensure stable operation of the plant, it is essential to maintain not only the main process lines but also the utility lines such as steam, cooling water, hot water, and compressed air. In these lines, the balance between "cost performance" and "stable reliability" is prioritized over extremely high performance. The product developed to accurately meet such on-site needs is the standard semi-metallic gasket manufactured by Vulcan, the "Vulcan No. 8590 Series (commonly known as CleanTite)." *For more detailed information, please refer to the related link. For more details, you can download the PDF or feel free to contact us.

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The roles of the core components "hoop" and "filler" of spiral wound gaskets.

Based on the official product documentation of Nichias Corporation, a thorough explanation of the "hoop" and "filler" that determine the performance of spiral gaskets!

"Why can spiral wound gaskets withstand high temperatures and high pressures?" "What do the differences between graphite, PTFE, and fillers signify?" "What should be considered when selecting the material for the hoop?" The "spiral wound gasket," which boasts overwhelming reliability under harsh conditions such as in power plants and petrochemical plants. The secret to its excellent sealing performance lies in its intricate spiral structure, which alternates between a V-shaped metal strip "hoop" and a cushioning material "filler." These two components serve as the skeleton and muscles of the gasket, and correctly understanding and combining their respective roles and materials is the key to effectively utilizing spiral wound gaskets. *For more detailed information, please refer to the related links. For further details, you can download the PDF or feel free to contact us.*

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A thorough explanation of the sealing material "Black Tight" that controls high temperature, high pressure, and extreme low temperature.

Based on the official product documentation from Bulker, a thorough explanation of why Blacktight boasts the highest level of reliability among various sealing materials!

"In high-temperature and high-pressure steam lines, leaks are absolutely unacceptable." "In LNG plants, reliable gaskets that can withstand thermal cycles are necessary for ultra-low temperature piping." "In critical equipment at petrochemical plants, we want to maintain stable sealing performance over the long term." These are harsh sealing conditions that underpin the safety and productivity of plants. In such environments, ordinary gaskets simply cannot compete. Developed to meet these advanced demands is the pinnacle of spiral gaskets, the "Vulcan No. 6590 Series (commonly known as Blacktight)." This article will thoroughly explain, based on Vulcan's official product documentation, why Blacktight boasts the highest level of reliability among various sealing materials, the secrets behind its overwhelming performance, and the correct selection and usage methods to maximize its capabilities. *For detailed content of the column, please refer to the related links. For more information, feel free to download the PDF or contact us directly.*

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A Comprehensive Explanation of "White Tight" Controlling Corrosive Fluids and Oxygen Lines

A thorough explanation of why white tights are chosen in harsh chemical environments!

"In the line of strong oxidizing acids, expanded graphite gaskets are compromised." "A gasket certified for safety is required for piping handling pure oxygen." "We are looking for a high-sealing material that does not contaminate fluids in the fine chemical manufacturing process." In environments such as chemical plants, semiconductor factories, and the medical and food sectors, extremely high cleanliness and resistance to strong corrosiveness that other materials cannot withstand are required. In such cases, not only general gaskets but even high-performance graphite-based sealing materials may be difficult to use. Under these harsh chemical conditions, the "Valqua No. 7590 Series," developed by Valqua, boasts overwhelming reliability as a last line of defense. *For more details, please refer to the related links. For more information, feel free to download the PDF or contact us.

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Thorough Explanation of 'Nafron Vortex' that Controls Corrosive Fluids and Pure Oxygen

A thorough explanation of why Nafron Vortex is chosen in harsh chemical environments!

"In the line of strong oxidizing acids, graphite gaskets are corroded." "A gasket certified for safety is required for piping handling pure oxygen." "We are looking for a high-seal material that does not contaminate fluids in the fine chemical manufacturing process." In environments such as chemical plants, semiconductor factories, and the medical and food sectors, extremely high cleanliness and resistance to strong corrosiveness that other materials cannot withstand are required. In such cases, even general gaskets, as well as high-performance graphite-based sealing materials, may be difficult to use. Under these harsh chemical conditions, the "TOMBO No. 9090 series," developed by Nichias Corporation, boasts overwhelming reliability as a last line of defense. *For more detailed information, please refer to the related link. For more details, you can download the PDF or feel free to contact us.*

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The pinnacle of spiral gaskets: "Graseal Vortex" [In-depth explanation]

A thorough explanation of why the Gracil Vortex is "widely used in spiral wound gaskets"!

"In high-temperature and high-pressure steam lines, leaks are absolutely unacceptable." "In cryogenic piping, a highly reliable gasket that can withstand thermal cycles is necessary." "For critical equipment in petrochemical plants, we want to maintain stable sealing performance over the long term." These are harsh sealing conditions that underpin the safety and productivity of the plant. In such environments, standard gaskets simply cannot compete. To meet these advanced requirements, Nichias Corporation has developed the pinnacle of spiral gaskets, the "TOMBO No. 1834R-GR series," by pooling its technological expertise. *For more details, please refer to the related links. For further information, feel free to download the PDF or contact us.*

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A Comprehensive Explanation of NA Vortex Gaskets Balancing Cost and Reliability

A thorough explanation of why NA vortex gaskets are commonly adopted as standard in many utility lines!

"I want to choose a reliable gasket for the plant's steam and cooling water lines while keeping costs down." "The joint sheet cannot withstand it, but the highest performance graphite filler is over-spec." "Is there a spiral gasket that is easy to install and economical for medium and low-pressure piping?" To ensure stable operation of the plant, it is essential to maintain not only the main process lines but also the utility lines such as steam, cooling water, and compressed air. In these lines, the balance between "cost performance" and "stable reliability" is prioritized over extremely high performance. To accurately respond to such on-site needs, Nichias Corporation has developed the standard semi-metallic gasket "TOMBO No. 1834R-NA Series (commonly known as NA Vortex Gasket)." *For more details, you can view the related links. For more information, please download the PDF or feel free to contact us.

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Everything from general-purpose resins to engineering plastics, including material selection and processing techniques.

Dive deep into the world of diverse resin products based on the comprehensive catalog of Daiko Co., Ltd., a manufacturer of industrial processing products!

"I want to reduce the weight of metal parts while maintaining sufficient strength." "I need parts that are resistant to chemicals, but I don't know which resin to choose." "I would like you to manufacture a complex-shaped resin part according to the drawing, starting from just one piece." In modern manufacturing, the role of "resin (plastic)" as an alternative material to metal and glass is becoming increasingly important. By combining unique properties such as lightweight, high strength, corrosion resistance, electrical insulation, and transparency, which metals do not possess, resin supports innovative product development across various industries, from electronics to automotive, construction, and medical fields. *For more detailed information, you can view the related links. For further details, please download the PDF or feel free to contact us.

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A thorough explanation of high-precision manufacturing from material selection to laser processing.

We will thoroughly explain Daiko's strengths and possibilities in metal processing, including laser processing technology!

"A seal is needed that can withstand high-temperature and high-pressure environments, which cannot be tolerated by resin or rubber." "I would like to have a single high-precision metal shim manufactured as a structural component of the machine." "I want to obtain a complex-shaped metal plate in a short delivery time without making a mold." In the industrial world, "metal" is one of the fundamental yet highly reliable materials. Its overwhelming strength, rigidity, and heat resistance provide value that cannot be replaced by other materials. This article delves into the world of "metal processed products" handled by Daiko Co., Ltd., a manufacturer of industrial products, based on the company's comprehensive catalog. *For detailed content of the column, you can view it through the related links. For more information, please download the PDF or feel free to contact us.*

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From water jet to laser and press processing, a thorough explanation of the core components.

Introducing Daiko's diverse range of processing equipment that meets various needs!

"I would like to have just one gasket made according to the drawing." "I need a large-diameter resin plate, but I don't know where to order it." "I want to create a prototype, but the mold costs are too high, so I've given up." In the manufacturing field, finding the "appropriate materials" is just as important as the "processing technology" that determines "how to shape those materials." No matter how excellent the material is, without precise processing technology, it is nothing more than a simple sheet or round rod. In this article, we will focus on the "processing equipment," which is the core secret of why Daiko Co., Ltd., a manufacturer of industrial products, can meet diverse customer needs with "high quality, short delivery times, and low costs." We will thoroughly explain the capabilities and potential of each piece of equipment. *For detailed content of the column, please refer to the related links. For more information, please download the PDF or feel free to contact us.*

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Selection of Grand Packing | All Knowledge to Find Suitable Products Based on Material, Use, and Performance

A thorough comparison and explanation of the materials, structures, and performance of each product! The "Complete Selection Guide" to help you choose the right item suitable for your equipment and application.

"Fluid is leaking from the pump shaft and won't stop," "The valve opening and closing is stiff, and too much torque is applied," "Which packing can withstand high-temperature thermal oil?" In the stable operation of plants and factories, "gland packing," which prevents fluid leakage from valve stems and pump shafts, plays an extremely important role as a sealing component, even though it may not be noticeable. This article will unveil the diverse world of gland packing provided by Daiko. *For detailed content of the column, you can view it through the related link. For more information, please download the PDF or feel free to contact us.*

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Glass and Biodegradable Ribbon | High-Temperature Insulation and Sealing Material from 400°C to 800°C

From material selection to shape selection, a comprehensive explanation of all the knowledge needed to choose the most suitable products according to their applications!

"Heat is leaking from the gap in the boiler door." "How should I seal uneven areas like the connection of the exhaust duct?" "I want to cover the piping with insulation material, but there are many bends, making it impossible to use flat insulation boards." In the world of high-temperature equipment, there are many situations where flexible sealing materials and insulation are essential, not only for flat flange surfaces but also for door joints, duct seams, and curved piping. These complex and three-dimensional areas, which cannot be addressed with rigid sheet gaskets, are managed by various woven products made from fibers. This article delves into the world of heat-resistant woven products provided by Daiko Co., Ltd., a manufacturer of industrial processing products. *For detailed content of the column, please refer to the related links. For more information, please download the PDF or feel free to contact us.*

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D1000 Spiral Wound Gasket Selection Guide

Introducing sealing materials that withstand high temperature, high pressure, and extreme low temperature!

"This is a steam line with high temperature and high pressure that cannot be endured by a joint sheet." "I want to ensure a reliable seal for low-temperature fluids." "I need long-term stable sealing performance in a harsh environment where thermal cycles are repeated." Under such harsh conditions, which can be considered the heart of the plant, general gaskets are simply not sufficient. To meet the demands of these tough environments, Daiko Co., Ltd., a manufacturer of industrial products, has gathered its expertise to offer the high-performance semi-metallic gasket "D1000 Spiral Gasket." In this article, we will thoroughly explain why the D1000 Spiral Gasket is an indispensable presence in the important piping and equipment of plants, its intricate structure and outstanding performance, as well as the correct selection and usage methods to maximize its capabilities. *For detailed content of the column, please refer to the related links. For more information, please download the PDF or feel free to contact us.*

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D7000 PTFE Cushion Gasket | Chemical Resistance and Electrical Insulation

A comprehensive explanation of high-performance sealing materials that achieve both chemical resistance and electrical insulation!

"In the line of strong acids and strong alkalis, the joint sheet deteriorates immediately." "At the dissimilar metal connections in the piping, corrosion due to electrolysis does not stop." "When using a PTFE gasket alone, the bolts loosened immediately and leaked." In chemical plants and precision equipment manufacturing lines, there are many situations where extremely high chemical resistance and electrical insulation properties are required, which cannot be addressed by common sealing materials. This article thoroughly explains why D7000 can simultaneously solve multiple challenges such as "corrosion resistance," "sealing performance," and "electrical insulation," as well as its unique hybrid structure and outstanding performance, along with the correct selection and usage methods to fully utilize its capabilities. *For detailed content of the column, please refer to the related links. For more information, feel free to download the PDF or contact us.

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A thorough explanation of EPDM molded gaskets that achieve a reliable seal with low tightening force.

Introducing Daiko D-Packing! Its structure and outstanding sealing performance.

"Since it is a resin flange, it cannot be tightened with strong force." "There may be some distortion on the flange surface, and with a sheet gasket, the leakage does not stop." "While we want the elasticity of rubber in the chemical line, we also want to ensure chemical resistance." Such issues frequently arise in the sealing of piping flanges. In particular, with PVC piping and FRP piping that cannot withstand high tightening forces, as well as flanges that are glass-lined, it is not uncommon for rigid sheet gaskets to fail to provide sufficient sealing performance. What Daiko Co., Ltd., a manufacturer of industrial products, offers is the high-performance molded gasket "D-Packing," which has a unique cross-sectional shape. In this article, based on Daiko Co., Ltd.'s official comprehensive catalog, we will thoroughly explain why D-Packing can achieve "high sealing performance" with "low tightening force," the secrets of its structure, the differentiation between two types according to application, and the correct knowledge to maximize its capabilities. *For detailed content of the column, please refer to the related link. For more information, please download the PDF or feel free to contact us.

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A Comprehensive Guide to General Piping Gaskets

Introducing the Daiko D6000 Non-Asbestos Joint Sheet!

"We are looking for gaskets that are safe and cost-effective for piping lines of water and oil. We are considering alternatives to asbestos products, but we are concerned about processability and sealing performance. Due to sudden maintenance, we urgently need gaskets with special shapes." To meet these universal needs in "general piping" across various industries, Daiko Co., Ltd., a manufacturer of industrial products, confidently offers its original product, the "D6000 Non-Asbestos Joint Sheet." In this article, based on Daiko Co., Ltd.'s official comprehensive catalog, we will thoroughly explain why the D6000 continues to be chosen in many workplaces, its structure and outstanding performance, as well as the correct selection and usage methods to fully utilize its capabilities. *For detailed content of the column, please refer to the related link. For more information, please download the PDF or feel free to contact us.*

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Thorough Explanation of Heat-Resistant Gaskets Responsible for Sealing Exhaust and High-Temperature Areas

Introducing Daiko glass cloth and biodegradable cloth!

"The manhole packing of the boiler hardens due to heat and starts leaking immediately. The flange of the exhaust duct has a rough surface, making it impossible to seal with a sheet gasket. We want a safe non-ceramic heat-resistant material that complies with regulations." In high-temperature equipment such as power plants, waste incinerators, boilers, and drying furnaces, common gaskets quickly lose their performance due to heat. Responding to this demand is Daiko Co., Ltd., a manufacturer of industrial products that consistently produces "glass cloth gaskets" and "biodegradable cloth gaskets" in-house from raw materials to final products. This article will thoroughly explain why these heat-resistant cloth gaskets are suitable for sealing high-temperature areas, covering everything from the manufacturing process to the selection of materials based on application, as well as the limitations and precautions that should be known. *For detailed content of the column, please refer to the related links. For more information, feel free to download the PDF or contact us directly.*

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From gaskets and packing to resin and metal. Technical expertise and product lineup.

A thorough explanation of the technology and product lineup of the processing manufacturer "Daiko"!

"I want to select the best product for our equipment from a wide variety of industrial sealing materials." "I urgently need a single gasket with a special shape that is not in the standard specifications." "I want to procure high-quality processed parts in a short delivery time while keeping costs down." In various industrial settings, challenges like these arise daily, from stable plant operations to maintaining the performance of machinery. One answer to these challenges is Daiko Co., Ltd., a "processing manufacturer" of industrial products. Daiko not only sells products but also utilizes industry-leading processing equipment and years of technology and experience to provide appropriate solutions tailored to each customer's challenges. This article delves into the diverse range of products centered around gaskets and packing that the company takes pride in, as well as the overwhelming processing technology that supports them. By reading this article to the end, you will understand why Daiko is relied upon in many workplaces. *For detailed content of the column, please refer to the related links. For more information, feel free to download the PDF or contact us.

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Practical Guide to Preventing Electric Corrosion | Choose Daiko for Insulating Gasket Products

We will clarify why consulting experts is essential in complex insulation design and product selection.

"When different metals are combined, one side becomes abnormally rusty." "Corrosion is spreading around the bolts of the piping flange." These are typical problems caused by "galvanic corrosion," which is frequently encountered in plants and machinery. Galvanic corrosion can be effectively prevented by correctly understanding its mechanism and taking appropriate measures. This article focuses on "electrical insulation," one of the many preventive measures against galvanic corrosion, and provides a comprehensive explanation of specific methods and how to select suitable insulation products according to site conditions. *For detailed content of the column, please refer to the related links. For more information, please download the PDF or feel free to contact us.*

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Maximize the performance of the grand packing to 100%!

A thorough explanation of all knowledge from selection to installation and replacement! Acquire solid knowledge to improve the reliability and lifespan of equipment.

The "gland packing" is the heart of fluid equipment such as valves and pumps, ensuring that fluid leakage is reliably prevented. It goes without saying that this small sealing component plays an extremely important role in supporting the stable operation and safety of plants. However, even the highest performance gland packing can significantly degrade in performance with just one mistake in selection or handling, potentially leading to serious troubles such as leakage or equipment damage. In this article, we provide a "complete guide" to maximize the performance of gland packing and use it safely. We comprehensively explain the points of caution that professionals should practice, covering everything from design and selection to storage, installation, replacement, and disposal. *For detailed content of the column, please refer to the related links. For more information, feel free to download the PDF or contact us.

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Natural Rubber Processing Examples | Large Curtains and Slitting Processing

Our large water jet cutting machine can also handle the processing of long products!

Based on the customer's drawing, we produced a large curtain measuring 1250mm x 5600mm from a 6mm thick natural rubber sheet. Using our water jet cutting machine, we precisely cut the upper mounting holes (19 holes of φ15mm) and the curtain-like slits as a single unit. *For detailed information about the column, please refer to the related link. For more details, you can download the PDF or feel free to contact us.

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NBR Rubber Processing Example | Improved Sealing Performance Double-Sided Step Gasket

By combining precise cuts with a water jet and adhesive processing using skilled techniques, we create high-value-added products!

Based on the customer's drawing, we manufactured a large-diameter gasket with an outer diameter of φ548mm and an inner diameter of φ410mm from a 5mm thick NBR rubber sheet. First, we precisely cut the gasket body (with 16 φ27mm bolt holes on a P.C.D. of 510mm) and the ring-shaped parts using a water jet cutting machine. After that, we bonded the rings to both sides of the body, finishing it as a stepped seal gasket. *For more detailed information, please refer to the related links. For further details, you can download the PDF or feel free to contact us.

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