ダイコー Product Lineup

The main difference between FF type gaskets and RF type gaskets is the shape and area of the sealing surface. Consequently, the shape of the flanges used and their suitable applications differ. FF stands for "Flat Face," which is referred to as "zenmenza" in Japanese. The gasket has a disc shape with bolt holes that covers the entire flat surface of the flange (full face gasket). Because the gasket is tightened over a large area, the pressure applied to any one part (surface pressure) is lower. RF stands for "Raised Face," which is referred to as "heimenza" in Japanese. The shape of the flange: the inner diameter side of the sealing surface is raised. Sealing occurs at this raised portion. *For more detailed information, please refer to the related links. For further inquiries, feel free to contact us.

"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.*

Gaskets and packing are both sealing materials that prevent the leakage of liquids and gases, but they are clearly distinguished by the "movement" of the places where they are used. In simple terms, gaskets are used in stationary places, while packing is used in moving places. A gasket is a sealing material used in stationary parts. When fixing parts together with bolts or similar fasteners, it is inserted between them to eliminate gaps, preventing internal fluids from leaking and external foreign substances from entering. *For more detailed information, please refer to the related links. Feel free to contact us for further inquiries.*

The RoHS Directive, established by the EU, is a regulation that restricts the use of certain hazardous substances in electrical and electronic equipment, making it an unavoidable environmental regulation for manufacturers worldwide. The RoHS Directive limits the presence of the following 10 substances in electrical and electronic equipment as part of EU environmental regulations. The regulated substances are lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls, polybrominated diphenyl ethers, butyl benzyl phthalate, dibutyl phthalate, bis(2-ethylhexyl) phthalate, and diisobutyl phthalate. *For detailed content of the column, please refer to the related links. For more information, feel free to contact us.

Daiko Co., Ltd. handles a variety of "special parts and packing for boilers." We offer a lineup that includes the "reflective water level gauge," which is widely used as a water level gauge for land and marine boilers, as well as "packing for sleeve gauge cocks" that maintain airtight structures, and "packing for boiler manholes." 【Product Lineup】 ■ Reflective water level gauge ■ Packing for sleeve gauge cocks ■ Sleeve packing ■ Gland packing ■ Round glass tubes, etc. *For more details, please refer to the PDF document or feel free to contact us.

Refractory Ceramic Fiber (RCF regulations) has been implemented, and regulations regarding the use of ceramic fibers have been established. Our company has transitioned from traditional ceramic fibers to biodegradable ceramic fibers that are designed to be soluble in the body if ingested, in order to comply with these regulations. 【Product Description】 This is a packing material made by weaving biodegradable ceramic fibers into a corner shape. It is used in exhaust ducts, boilers, combustion equipment, pumps, and more. - This packing is woven with biodegradable fibers and organic fibers, complying with RCF regulations. - It does not have airtightness, so some leakage may occur. Please use it in areas where leakage is acceptable. - We also offer cut sales starting from a standard length of 30 meters.

The "SGM Soft Teflon Gasket" is a revolutionary non-asbestos joint sheet gasket made of 100% PTFE, featuring excellent heat resistance and chemical resistance, as well as a combination of strength and flexibility. It possesses the required characteristics for gaskets in a well-balanced manner at a high level, allowing for versatile use without the need to differentiate gaskets for each process. 【Features】 ■ Excellent adaptability, easily sealing even on slightly uneven surfaces ■ Strong against stress fluctuations, providing stable sealing performance over a long period ■ Has the highest level of strength among non-asbestos joint sheets ■ Minimal creep relaxation, allowing for stable use over a long period even at the upper limit of the usable temperature *For more details, please refer to the PDF materials or feel free to contact us.

Daiko Co., Ltd. will answer your questions regarding gaskets and packing. "Is it possible to reuse a gasket that has been used once?" → Reuse is not recommended regardless of the usage period or type. Although flanges may appear smooth at first glance, they have microscopic irregularities. A gasket that has been used once deforms to fit the contours of the flange. If this deformed gasket is reused, gaps may form between the flange and the gasket, leading to the possibility of leaks. *For more details, please refer to the PDF document or feel free to contact us.

Daiko Co., Ltd. will answer your questions regarding gaskets and packing. "What should I use if Teflon is too hard and won't stop?" → We recommend Teflon cushion or soft Teflon. The core joint sheet is soft, making it easy to conform to flanges, which improves sealing performance. Soft Teflon is pure Teflon, so it can be used in processes that are sensitive to impurities. When you actually use it, we will help you select the appropriate gasket, so please feel free to consult us. *For more details, please refer to the PDF materials or feel free to contact us.

An asbestos joint sheet is a type of sheet-like gasket used at the flange of piping and the joints of equipment. As the main raw material, asbestos, which has excellent heat resistance, chemical resistance, and strength, was used. Natural rubber or synthetic rubber is added as a binder. This creates flexibility and sealing properties. Chemicals and fillers are mixed in to enhance other performance characteristics. Manufacturing and use are generally prohibited. There is a transition to "non-asbestos (non-as) joint sheets" that do not use asbestos. *For detailed content of the column, you can view it through the related links. For more information, please feel free to contact us.

The vortex gasket is an essential sealing component for the joints of piping flanges used under harsh conditions such as high temperature and high pressure, due to its excellent sealing performance and durability. The vortex gasket (spiral gasket) is made by alternately winding a thin metal strip (hoop) with a V-shaped cross-section and a soft non-metallic material (filler) that has cushioning and sealing properties. Regarding its structure and features, the metal hoop serves as the framework, providing strength and resilience to the gasket. The filler material fills the gaps, demonstrating high sealing performance. *For detailed content of the column, please refer to the related links. For more information, feel free to contact us.*

O-rings, gaskets, and packing are all types of seals that prevent the leakage of liquids and gases, but they differ in their usage and shape. An O-ring is a ring-shaped seal with a cross-section that is O-shaped, as its name suggests. It utilizes the elasticity of the material to be compressed when fitted into a groove, thereby achieving a sealing effect. When used for motion, it is a type of packing, and when used for fixing, it is a type of gasket. Due to its simple structure, low cost, and high sealing performance in a compact space, it is used in a wide range of fields, including automobiles, hydraulic and pneumatic equipment, and home appliances. *For more detailed information, please refer to the related links. For further inquiries, feel free to contact us.

Are there any issues regarding leak prevention in PVC piping? "When I tried to stop the leak by tightening it strongly, the flange broke." "The tightening is inconsistent among workers, leading to unstable construction quality." "I thought I had tightened it properly, but it's still leaking." Unlike metal, PVC piping cannot be tightened with excessive force. Therefore, a delicate balance is required with standard sheet gaskets to ensure that they "do not leak but also do not break from over-tightening," which always carries the risk of leakage. *For more details, you can view the related links. Please feel free to contact us for more information.

Asbestos is a naturally occurring fibrous mineral, also known as "sekimen" and "ishi-wata." Its fibers are very fine, making it easy to disperse in the air, and inhalation poses a risk of health damage. In 1975, the spraying of asbestos exceeding 5% by weight was generally prohibited. This marked the first step in asbestos regulation. In 1995, the spraying of asbestos exceeding 1% by weight was generally prohibited, and at the same time, the manufacture, import, transfer, provision, and use of highly carcinogenic amosite (brown asbestos) and crocidolite (blue asbestos) were completely banned. *For detailed information, please refer to the related links. For more information, feel free to contact us.

As of November 1, 2015, the amendment to the Labor Safety and Health Act has made Refractory Ceramic Fibers (RCF) subject to regulations aimed at preventing health hazards to workers. With this amendment, RCF has been designated as a substance that requires labeling and classified as a Category 2 substance under the management of specific chemical substances, thus subjecting it to stricter preventive regulations. In response to this RCF regulation, Daiko has completely switched from traditional ceramic cloth to a safer, bio-soluble ceramic cloth. *For more detailed information, please refer to the related links. For further inquiries, feel free to contact us.*

Gaskets are sealing materials used at the joints of machinery and piping, primarily serving to prevent fluid leaks. In plant maintenance and machinery equipment, gaskets are very important components. However, if their selection and management are mishandled, there is a risk of serious accidents or production stoppages. If you have any concerns or requests regarding gaskets, please feel free to consult us. Based on our years of experience and expertise, we will do our utmost to support you in solving your challenges. *For detailed content of the column, you can view it through the related links. For more information, please do not hesitate to contact us.

Joint sheet gaskets are used in a wide range of fields as sealing materials for piping. However, to maximize their performance and ensure safe use, it is essential to select the appropriate type based on the fluid and usage conditions, as well as to carry out correct installation. This article explains the selection criteria for joint sheet gaskets, as well as important points to consider during installation and maintenance. *For detailed content of the column, please refer to the related link. For more information, feel free to download the PDF or contact us.

Vortex gaskets are used in many plants and facilities due to their excellent sealing performance. However, to maximize their performance, appropriate product selection during the design phase and correct handling during installation are essential. This article comprehensively explains important precautions for using vortex gaskets. *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.*

In food factories and manufacturing lines, the gaskets used are extremely important components that are directly related to the safety of the products. If, by any chance, harmful substances migrate (leach) into the food due to the material of the gasket, it could lead to serious health issues or product recalls. Therefore, gaskets that come into direct contact with food or may come into contact with it must meet the strict safety standards set by Japan's Food Sanitation Act. This article clearly explains the important points for selecting safe gaskets that comply with the Food Sanitation Act. *For detailed content of the column, please refer to the related link. For more information, feel free to download the PDF or contact us.*

Is work on-site being halted due to issues like 'leaking from the packing' and 'despite multiple repairs, the cause cannot be identified'? In this article, we will thoroughly explain the three main causes of packing leaks and provide specific countermeasures that can be implemented from a practical perspective. We encourage equipment maintenance personnel and site leaders to make use of this information. *For detailed content of the column, please refer to the related link. For more information, feel free to download the PDF or contact us.

"We need a large-diameter joint sheet gasket exceeding φ3000, but we cannot find a vendor that can process it. It requires a special shape and high processing precision. The plant's scheduled maintenance is approaching, and we would like a quick turnaround." DaiCo will solve these challenges. By combining one of Japan's largest water jet processing machines with years of expertise, we provide high-precision and short-lead-time gasket processing services that meet our customers' stringent requirements. *For detailed information on the column, please refer to the related link. For more details, please download the PDF or feel free to contact us.*

In the maintenance of exhaust ducts and combustion equipment, reliable sealing in high-temperature environments is essential for safe operation and environmental protection. Daiko is one of the few specialized manufacturers that consistently handles everything in-house, from the selection of heat-resistant materials such as glass cloth and biodegradable cloth to its unique "rubber coating process" and the final production of gasket products. *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.*

We would like to introduce our biocompatible dissolvable cross gasket, "D5800." With the enforcement of regulations regarding Refractory Ceramic Fibers (RCF), there are now restrictions on the use of ceramic cloth. Our company has transitioned from traditional ceramic cloth to RCF-compliant biocompatible dissolvable cloth. We also offer a baked-on anti-seizing treatment product (graphite treatment) called "D5800-G." 【Specifications】 ■ Thickness: t2・t4～(1 ply t2) ■ Safe operating temperature: 800℃ ■ Contains SUS metal ■ Natural rubber coated on biocompatible dissolvable cloth *For more details, please download the PDF or feel free to contact us.

We would like to introduce our glass cloth gasket "D5400." This gasket is made by applying natural rubber to glass cloth and shaping it into a specified form. We also offer a baked-on anti-seizing treatment product (graphite treatment) "D5400-G," which improves the release properties with other materials through graphite treatment, making maintenance and replacement easier. Please feel free to contact us when you need it. 【Specifications】 ■ Thickness: t1.6・t3.2～(1 ply t1.6) ■ Safe operating temperature: 400℃ ■ Natural rubber applied to glass cloth *For more details, please download the PDF or feel free to contact us.

We would like to introduce our glass tape 'D5400-T'. This product is woven using a tape weaving machine with a special rubber coating to improve the processability of glass fibers, and it is slit into narrow widths. It excels in heat resistance and workability, and its applications include sealing materials for large-diameter exhaust ducts, thermal insulation for piping, and burn prevention. 【Specifications】 ■ Heat resistance temperature: 400℃ ■ Dimensions (mm) ・Thickness: 1.6～ ・Width: 15～ ・Length: 30 *For more details, please download the PDF or feel free to contact us.

We would like to introduce our ceramic tape 'D5800-T'. This product is woven using a special rubber coating to improve the workability of ceramic fibers, and it is slit into narrow widths. It excels in heat resistance and workability, and its applications include gasket material for large-diameter exhaust ducts, insulation for piping, and burn prevention. 【Specifications】 ■ Heat resistance temperature: 800℃ ■ Dimensions (mm) ・Thickness: 2.0～ ・Width: 15～ ・Length: 30 *For more details, please download the PDF or feel free to contact us.

We would like to introduce our glass ribbon 'D5400-R'. This is a narrow-width woven fabric made from glass fibers, suitable for applications such as sealing materials for large-diameter exhaust ducts, thermal insulation for piping, and burn prevention. It has excellent thermal insulation properties and is environmentally friendly as it is non-asbestos based. Additionally, it is used for high-temperature duct sealing. 【Specifications】 ■ Heat resistance temperature: 400℃ ■ Dimensions (mm) ・ Thickness: 1.6～ ・ Width: 25～ ・ Length: 30 *For more details, please download the PDF or feel free to contact us.

We would like to introduce our ceramic ribbon 'D5800-R'. The heat resistance temperature is 800°C, with dimensions of thickness starting from 4mm, width starting from 25mm, and length starting from 30mm. Additionally, we offer various textile products, including the glass ribbon 'D5400-R' with a heat resistance temperature of 400°C, glass round packing 'D5400-M', and ceramic round packing 'D5800-M'. 【Specifications】 ■ Heat resistance temperature: 800°C ■ Dimensions (mm) ・Thickness: from 4 ・Width: from 25 ・Length: from 30 *For more details, please download the PDF or feel free to contact us.

We would like to introduce our glass round packing 'D5400-M'. It is made by braiding glass fibers and ceramic fibers into a rope, designed for thermal insulation and heat resistance. It is used for sealing in boilers and industrial furnaces. Additionally, we also offer the ceramic round packing 'D5800-M'. Please feel free to contact us when you need it. 【Specifications】 ■ Heat resistance temperature: 400℃ ■ Dimensions (mm) ・Nominal diameter: 6.4 to 30.0 *For more details, please download the PDF or feel free to contact us.

We would like to introduce our ceramic round packing 'D5800-M'. It is made by braiding glass fibers and ceramic fibers into a rope, designed for thermal insulation and heat resistance. It is used for sealing in boilers and industrial furnaces. We also have the glass round packing 'D5400-M' available. Please feel free to contact us if you need any assistance. 【Specifications】 ■ Heat resistance temperature: 800℃ ■ Dimensions (mm) ・Nominal diameter: 6.4 to 30.0 *For more details, please download the PDF or feel free to contact us.

We would like to introduce our glass corner packing 'D5400-K'. This product is made by weaving glass fibers and ceramic fibers into a corner shape. It features thermal insulation and heat resistance. It is used in exhaust ducts, boilers, combustion equipment, pump seal areas, and more. Please feel free to contact us when you need it. 【Specifications】 ■ Heat resistance temperature: 400℃ ■ Dimensions (mm) ・ Nominal diameter: 6.4 to 30.0 *For more details, please download the PDF or feel free to contact us.

We would like to introduce our ceramic round packing 'D5800-K'. This product is made by weaving glass fibers and ceramic fibers into a corner shape. It has features such as thermal insulation and heat resistance. It is used in exhaust ducts, boilers, combustion equipment, pump seal areas, etc. Please feel free to contact us when you need it. 【Specifications】 ■ Heat resistance temperature: 800℃ ■ Dimensions (mm) ・Nominal diameter: 6.4 to 30.0 *For more details, please download the PDF or feel free to contact us.

We would like to introduce our "Glass Yarn." This product is a cord made by twisting heat-resistant glass fiber threads, suitable for steam pipes, exhaust gas packings for oil stoves, and air conditioning duct packings. It has excellent thermal insulation properties and is environmentally friendly as it is non-asbestos. It is used for high-temperature duct seals. 【Lineup】 ■ 3.2mm to 9.6mm / 1kg roll ■ 12.7mm to 19.1mm / 5kg roll *For more details, please download the PDF or feel free to contact us.

We would like to introduce a case study of duct products processed by our company. Natural rubber is applied to glass cloth and molded into a specified shape. This product is for ducts used in incinerators and dryers. Please feel free to contact us when you need our services. 【Case Overview】 ■Features: Gasket molded into a specified shape with natural rubber applied to glass cloth ■Application: Gasket for ducts in incinerators and dryers ■Safe Operating Temperature: 400℃ *For more details, please download the PDF or feel free to contact us.

We would like to introduce a case study of the processing of core-in gas gaskets (Type P) that we conducted. Natural rubber is applied to glass cloth and molded into a specified shape. These gaskets are used in applications such as doors of furnaces and dryers, dampers, exhaust gas systems, and ducts. Please feel free to contact us when you need assistance. 【Case Overview】 ■ Features: Gasket molded into a specified shape with natural rubber applied to glass cloth ■ Applications: Doors of furnaces and dryers, dampers, exhaust gas systems, ducts, and manholes ■ Safe Operating Temperature: 400℃ *For more details, please download the PDF or feel free to contact us.

We would like to introduce a case study of our manhole product processing. A natural rubber coating is applied to a biocompatible dissolvable cloth containing SUS metal, which is then molded into a specified shape. This product can be used as a gasket for combustion equipment such as exhaust gases. Please feel free to contact us when you need our services. 【Case Overview】 ■Features: A gasket molded into a specified shape with a natural rubber coating on a biocompatible dissolvable cloth containing SUS metal. ■Applications: Gaskets for combustion equipment such as exhaust gases. ■Safe Operating Temperature: 800℃ *For more details, please download the PDF or feel free to contact us.

This product is a gasket with excellent mechanical strength by inserting stainless steel plates (SUS316) into the core material. It has a heat resistance temperature equivalent to that of asbestos sheets and is also excellent in corrosion resistance. It has a long-standing high performance in Europe, where the transition to non-asbestos materials has progressed, and it is a gasket material that can be used over a wide temperature range from high temperatures to extremely low temperatures. 【Features】 ■ Excellent heat resistance and chemical resistance ■ Sealing performance and chemical resistance comparable to asbestos joint sheets ■ Excellent corrosion resistance ■ Wide operating temperature range from high to extremely low temperatures ■ Excellent compressibility *For more details, please download the PDF or feel free to contact us.

This product is a spiral wound gasket made with graphite (graphitic material) tape as the filler material. Due to the properties of graphite-based materials, it maintains excellent sealing performance even under harsh conditions where temperature cycles from high to low are repeated. Please feel free to contact us when you need assistance. 【Specifications】 ■ Maximum pressure: 29.4 MPa (300 kgf/cm²) ■ Temperature range: -270 to 450℃ *For more details, please download the PDF or feel free to contact us.

This product is a spiral wound gasket that uses PTFE tape as the filler material. Thanks to the excellent chemical resistance and corrosion resistance of PTFE, it is suitable for acidic fluids and corrosive fluids that are difficult to handle with non-asbestos or graphite-based gaskets. Please feel free to contact us when you need assistance. 【Specifications】 ■ Maximum pressure: 29.4 MPa (300 kgf/cm²) ■ Temperature range: -260 to 300℃ *For more details, please download the PDF or feel free to contact us.

We would like to introduce the "D1000 Spiral Wound Gasket" that we handle. We offer three products: the "Spiral Wound Gasket with Inner and Outer Rings," which allows for easy centering of the gasket due to the outer ring; the "Spiral Wound Gasket with Outer Ring," used in joints that do not require the pressure resistance of the type with inner and outer rings; and the "Basic Diameter Spiral Wound Gasket," used in various pressure vessel covers. We can also manufacture oval shapes and dimensions outside of standard specifications. We can accommodate urgent maintenance needs for valves, such as basic types or those with only inner rings. 【Product Lineup】 ■ Spiral Wound Gasket with Inner and Outer Rings ■ Spiral Wound Gasket with Outer Ring ■ Basic Diameter Spiral Wound Gasket ■ Oval Spiral Wound Gasket (Special Dimensions) ■ Spiral Wound Gasket with Inner and Outer Rings (Special Dimensions) *For more details, please download the PDF or feel free to contact us.

This product is a type of semi-metallic gasket commonly referred to as a spiral wound gasket. Due to its unique structure, it can be used under high temperature and high pressure conditions similar to metal gaskets, while demonstrating excellent sealing performance. It is widely adopted in piping and equipment across a broad range of fields. Please feel free to contact us when you need assistance. 【Features】 ■ A spiral structure made by alternately layering a V-shaped cross-section metal strip (hoop) and a non-metallic cushioning material (filler), which are then securely welded at the beginning and end of the spiral. ■ Four types of shapes are available to match the gasket seating of the target flange: basic shape, with inner and outer rings, with outer ring, and with inner ring. *For more details, please download the PDF or feel free to contact us.

This product is a metal gasket developed based on a rational design for high-temperature and high-pressure flange sealing materials. It maintains stable sealing performance over a wide range and does not easily cause leakage or damage even under harsh conditions such as thermal cycles, pressure cycles, and thermal pressure in piping systems. Please feel free to contact us when you need assistance. 【Features】 ■ Withstands high-temperature and high-pressure conditions, maintaining excellent sealing performance even when usage conditions change rapidly. ■ Low adhesion to flanges makes cleaning easy and allows for smooth gasket replacement work. * For more details, please download the PDF or feel free to contact us.

"TOMBO No.9096-S" is a soft-type PTFE gasket. It has excellent chemical resistance and insulation properties, combined with heat resistance and flexibility, significantly improving its sealing capability. It possesses the required characteristics for gaskets in a well-balanced manner at a high level, making it suitable for a wide range of applications. 【Features】 ■ Soft-type PTFE gasket ■ Extremely high flexibility ■ Significantly improved heat resistance compared to general PTFE gaskets ■ Well-balanced characteristics at a high level ■ Usable in a wide range of applications *For more details, please download the PDF or feel free to contact us.

"TOMBO No.9096" is a soft PTFE-based gasket that offers excellent chemical resistance and insulation properties, along with heat resistance and flexibility. This product significantly improves the original sealing performance. It has very high flexibility and greatly enhances heat resistance compared to standard PTFE gaskets. Please feel free to contact us when you need assistance. 【Features】 ■ Very soft ■ Easy to install on complex sealing surfaces with adhesive tape *For more details, please download the PDF or feel free to contact us.

The "SGM Gasket" is a 100% PTFE gasket for process piping and equipment flanges that excels in chemical resistance and heat resistance, combining strength and flexibility. Made from high-strength expanded PTFE, this fluororesin gasket is soft and has excellent conformability, allowing it to easily seal even on slightly uneven surfaces, and it can also be used as an insulating gasket. Please feel free to contact us when you need assistance. 【Features】 ■ Excellent chemical resistance and heat resistance ■ Combines strength and flexibility ■ 100% PTFE ■ Made from high-strength expanded PTFE ■ Soft and has excellent conformability, easily sealing on slightly uneven surfaces ■ Usable as an insulating gasket *For more details, please download the PDF or feel free to contact us.