ダイコー List of Products and Services

Daiko Corporation will answer your questions regarding gaskets. "What could be the cause of a leak during a pressure test using a joint sheet?" → (1) The shape is F.F (full face). (2) Stress relaxation (compression of the gasket) has occurred. (1) F.F. gaskets require a greater tightening force compared to F.R. (ring type) gaskets because they have a larger contact area with the flange. A leak may have occurred due to insufficient tightening surface pressure, so we recommend changing the shape to F.R. (2) There is a possibility that the tightening force has decreased due to stress relaxation (compression of the gasket). Please retighten with the initial tightening force. *For more details, please refer to the PDF document or feel free to contact us.

• Piping Materials
• Other machine elements

Daiko Co., Ltd. will answer your questions regarding gaskets and packing. "What is the difference between SUS316 and SUS316L?" → There is a difference in workability. SUS316L is a stainless steel that is easier to process than SUS316. SUS316 contains a higher amount of hard metals (Cr, Ni), making it difficult to work with, but by lowering the carbon content, it becomes slightly softer and easier to process. (The "L" stands for low carbon.) The main difference is the carbon (C) content, with SUS316L having "0.03% or less," which falls under the "0.08% or less" of SUS316. *For more details, please refer to the PDF document or feel free to contact us.

• Piping Materials
• Other machine elements

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.

• Piping Materials
• Other machine elements

Daiko Co., Ltd. will answer your questions regarding gaskets and packing. Products like T9010-A6 and V7030(S) allow for sealing at low surface pressure by sandwiching a soft felt material in the joint sheet to improve sealing performance. However, when used in areas exposed to rain or condensation, the felt can absorb moisture, making it unsuitable. In such cases, it is better to use joint sheets like T9010-A5 or V7030(N) along with products that only have a Teflon coating.

• Piping Materials

Daiko Corporation will answer your questions regarding gaskets and packing. 〇 Creep Phenomenon It is known that fluoropolymer-based gaskets experience significant decreases in bolt axial force due to creep relaxation characteristics. This reduction in bolt axial force raises concerns about sealing performance, and the risk of leakage accidents increases due to internal pressure loads and external forces from earthquakes, making it necessary to properly manage bolt axial force through re-tightening. 〇 Countermeasure Products We offer gaskets that improve creep resistance by mixing PTFE with special inorganic fillers that have corrosion and heat resistance, suitable for use up to 200°C. Representative products include Vulcan's V7020 and Nichias's T9007LC. They are resistant to almost all fluids except for hydrofluoric acid and strong alkalis. We have stock in sheet form and can process it to your specified dimensions.

• Piping Materials

[Daiko Communication] We will deliver the latest gasket information and factory equipment updates. In addition to Daiko's processing technology, we will also include changes in gasket and packing specifications due to legal revisions, as well as new products from manufacturers!

• Piping Materials

"D-1000" is a high-performance semi-metallic gasket rationally designed for high temperature and high pressure applications. It consists of a V-shaped cross-section metal hoop and sealing material (various fillers) layered together, tightly wound in a spiral shape, with the beginning and end portions of the hoop fixed by spot welding. Broadly speaking, there are three types: one with inner and outer rings of metal protection, one with only an outer ring of metal protection, and a basic type without any metal protection. Each type is selected based on the type and material of the flange. [Features] - Rationally designed for high temperature and high pressure applications - Has rich elasticity and can regulate tightening force based on installation thickness *For more details, please refer to the PDF document or feel free to contact us.

• Piping Materials
• Other machine elements

The Daiko Teflon Cushion Gasket 'D7000' features a Teflon outer layer and uses a joint sheet and heat-resistant milboard as the core material, providing excellent elasticity and flexibility. Thanks to the stable corrosion resistance of Teflon (fluororesin), it can be used with a wide range of corrosive fluids such as acids, alkalis, and organic solvents. Additionally, it has excellent electrical insulation properties and can be used as an insulating gasket for anti-corrosion piping. 【Features】 ■ Excellent chemical resistance ■ Usable over a wide temperature range from low to high temperatures ■ Provides cushioning and high sealing performance compared to pure Teflon ■ Improved creep reduction and stress relaxation at high temperatures compared to pure Teflon, ensuring stable sealing performance *For more details, please refer to the PDF document or feel free to contact us.

• Piping Materials
• Other machine elements

The Daiko D-6000 is a gasket material made using high-quality non-asbestos fibers and a synthetic rubber binder with excellent oil resistance, mixed with a small amount of filler and rolled and vulcanized. It is suitable as a substitute material for asbestos joint sheets (within the usable range). Additionally, it is a product that has passed official testing for the standard JIS S 3200-7, which is applicable to plumbing fixtures. 【Features】 - Excellent workability, similar to asbestos joint sheets - Capable of producing large-diameter products - Due to its excellent workability, it can accommodate short delivery times - Elastic and provides good fitting at the flange area *For more details, please refer to the PDF materials or feel free to contact us.

• Piping Materials
• joint

Daiko's Grand Packing 'D4101-4106' for Pumps and Valves 'D4101' is a highly resilient grand packing made using a special braiding method that combines and impregnates carbon fibers with Teflon (PTFE) and special lubricating oil. Grand packing is a sealing gasket widely used in static, rotating, and reciprocating shaft sealing locations such as valves, pumps, manholes, and furnace openings. In addition, we offer products such as 'D-4102', which is made by impregnating pure Teflon fibers with Teflon dispersion, and 'D-4103', which is made by impregnating special carbon fiber with Teflon dispersion and braiding it. 【Performance】 ■ Operating temperature range: 200℃ ■ Pressure: 1MPa ■ Shaft peripheral speed: 25m/Sec ■ PV value: 10MPa·m/sec ■ pH value: 2-12 *For more details, please refer to the PDF document or feel free to contact us.

• Piping Materials
• Other machine elements

Daiko's high-temperature sleeve packing "D-2000" for boilers is a high-temperature sleeve packing made from chemically stable graphite, which has excellent heat resistance. It resolves the heat resistance issues that were problematic in conventional non-asbestos sheets primarily composed of synthetic rubber under high-temperature steam conditions. Additionally, it is reinforced with a small amount of high-strength fibers, offering great flexibility and moderate surface hardness, making it resistant to scratches during handling. We also offer a graphite-filled Teflon material called "D-2000-G." 【Features】 <D-2000> ■ Excellent heat resistance ■ Based on chemically stable graphite ■ Highly flexible with moderate surface hardness *For more details, please refer to the PDF document or feel free to contact us.

• Piping Materials
• Other machine elements

The Daiko D7000-ST is a PTFE sealing tape that can withstand temperatures from -100°C to 260°C. It is particularly suitable for sealing high-temperature areas and can be used with acids, alkalis, and chemicals, allowing for a clean and easy application without getting your hands dirty. Additionally, PTFE is a self-lubricating non-stick material, making it easy to screw in and remove without causing seizing. 【Features】 ■ Extremely easy to attach and detach ■ Improves work efficiency ■ Not affected by the fluid used, and does not cause contamination ■ Operating temperature: -100 to 260°C *For more details, please refer to the PDF document or feel free to contact us.

• Piping Materials
• Other machine elements

The Daiko D-4000 is a non-asbestos joint sheet that can cover the practical temperature range of asbestos joint sheets (up to 400°C). Expanded graphite is a material obtained by treating high-purity graphite crystals with chemical agents and then heat-treating them at high temperatures. By incorporating stainless steel plates (SUS316) as a core material, it creates a gasket with excellent mechanical strength. It has a heat resistance level comparable to that of asbestos sheets and possesses excellent corrosion resistance. The D-4000 is a gasket material that has a long-standing excellent track record in Europe, where non-asbestos technology has advanced, and can be used widely from high temperatures to extremely low temperatures. It can be used for gaskets in various piping flanges, valves, equipment, pumps, pressure vessels, heat exchangers, condensers, and more. 【Features】 ■ Sealing and chemical resistance comparable to asbestos joint sheets ■ Excellent corrosion resistance ■ Wide temperature range from high to extremely low temperatures ■ Excellent compressibility *For more details, please refer to the PDF document or feel free to contact us.

• Piping Materials
• Other machine elements

Daiko's "Insulated Bolt (Sleeve + Washer Type)" The "Insulated Bolt (Sleeve + Washer Type)" is a product that prevents electrical corrosion by electrically insulating the space between flanges and between flanges and bolts/nuts. Using glass-filled epoxy resin board and high-temperature mica laminated board as washers, and employing a PTFE sleeve for bolt protection, it offers high insulation resistance and excellent mechanical strength. Additionally, we also offer the integrated "T9019-Z," which combines an insulating sleeve and insulating washer that can be set on commercially available bolts. 【Features】 <Insulated Bolt (Sleeve + Washer Type)> ■ Excellent electrical resistance and tightening strength ■ Smooth delivery response even for specifications other than standard products ■ Two types of washer materials can be selected based on the usage temperature ■ Excellent light resistance and weather resistance, with very little aging change *For more details, please refer to the PDF document or feel free to contact us.

• Piping Materials
• Other machine elements
• bolt

The "D1000(GR)" is a gasket packing that can be used on steam lines in factories and flanges of boiler equipment. Unlike conventional products that can withstand temperatures up to 350°C, this product has a higher heat resistance of 450°C, which reduces the likelihood of leaks. Additionally, since it is manufactured in-house, standard size products can be shipped as quickly as the same day, and custom products can be shipped in as little as three days. 【Features】 ■ Usable at high temperatures Unlike conventional products that can withstand temperatures up to 350°C, this product has a higher heat resistance of 450°C, making it less likely to leak. ■ Realization of short delivery times Products in JIS and JPI standard sizes are in stock from 15A to 300A, allowing for same-day shipping. Furthermore, due to in-house manufacturing, custom-sized products can also be shipped in as little as three days.

• Piping Materials
• Other machine elements

This is a gasket made from Daiko's "D Packing (EPDM molded packing)" rubber, which is pressure-formed into a cross-sectional shape. For areas requiring chemical resistance and corrosion resistance, we also offer PTFE-coated products that are integrally bonded with PTFE! This packing material provides stable sealing performance at lower surface pressure compared to punched rubber sheet gaskets. (Characteristics) - Being a molded product, it has no uneven thickness and a smooth surface. - The presence of two O-ring shaped protrusions ensures no leakage even at low surface pressure. - The hardness of the rubber is appropriately adjusted to buffer thermal stress and piping stress. - Made from high-quality virgin rubber, it has a long lifespan. - It can also be used with resin and resin-lined flanges. (Supported Sizes) 5K 15A~300A 10K 15A 300A (Operating Temperature Range) -40℃~ 100℃ For sizes above 350A, rubber punched products will be used. (Maximum Operating Pressure) 0.98MPa (approximately 10kgf/cm²)

• Piping Materials
• Other machine elements

Daiko's "Glass Cloth & Biodegradable Ceramic Cloth RCF Compatible" This is a laminated product made by applying rubber material to ceramic cloth and glass cloth that have been treated to prevent smoke. It is used for equipment such as frame packings, manhole gaskets, gasket tapes, and ducts for manholes, hot air, and exhaust gases. There are also types treated with graphite or Teflon on the surface to improve peelability during maintenance and replacement. 【D5800RCF (Biodegradable Ceramic Cloth Gasket)】 With the enforcement of regulations on Refractory Ceramic Fibers (RCF), there are now restrictions on the use of ceramic cloth. Unlike the complete ban on traditional asbestos, these regulations are protective measures from the Ministry of Labor. Our company has revised the conventional ceramic cloth to a biodegradable ceramic cloth compatible with RCF. 【D5400 Glass Cloth Gasket】 This gasket is made by applying natural rubber to glass cloth and shaping it into a specified form. *For more details, please feel free to contact us.

• Piping Materials
• Other machine elements

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.

• Piping Materials
• Pipe Fittings

The Daiko-made "Vibration-Absorbing Pad" features uneven surfaces on both sides and serves as a cushioning, vibration-damping, and soundproofing material. It prevents the transmission of vibrations, absorbs light noise, and mitigates impacts, functioning as a rubber mat. Simply placing it under the object allows for easy vibration-damping effects. It is easy to install, provides both vibration and soundproofing effects, can be cut to specified dimensions, and is economical. 【Features】 ■ Extremely easy installation ■ Significant vibration and soundproofing effects ■ Excellent cushioning effect ■ Economical *For more details, please refer to the PDF document or feel free to contact us.

• Piping Materials
• Other machine elements

"Rubber molded products" enable simple vibration isolation for suspended equipment by combining rubber bushes and rubber washers. We offer a lineup of rubber molded products, including rubber bushes with bonded washers, as well as dimensionally stable "EPDM molded gaskets" and "ribbed gaskets." These products can be used for suspended support of air conditioning equipment, packaged air conditioners, fan coil units, ventilation systems, pumps, blowers, pipes, ducts, and other devices. [Features] - Enables simple vibration isolation for suspended equipment - Rubber bushes come with bonded washers *For more details, please refer to the PDF materials or feel free to contact us.

• Piping Materials
• Other machine elements

At Daiko Co., Ltd., we handle a variety of "Teflon-based gaskets." The "pure Teflon" is a gasket made from punched Teflon (PTFE). It has excellent chemical resistance and also features outstanding electrical insulation properties. In addition, we offer products such as "Teflon sand," which uses a heat-resistant millboard as the core material and has PTFE as the outer layer, providing excellent elasticity and flexibility, as well as "filled Teflon" and "soft Teflon." 【Features】 < Pure Teflon > ■ Gasket made from punched Teflon (PTFE) ■ Excellent chemical resistance and electrical insulation ■ Operating temperature range: -50 to 100℃ ■ Maximum operating pressure: 1MPa (10kgf/cm²) *For more details, please refer to the PDF document or feel free to contact us.

• Piping Materials
• Other machine elements

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.

• Piping Materials
• Other machine elements

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.

• Piping Materials
• Other machine elements
• Boiler

At Daiko Co., Ltd., we handle various types of "Non-Asbestos Joint Sheets for Steam Piping." The Nichias product "T1120 Clean Seal Top" is a black sheet gasket that contains no asbestos and is primarily made of expanded graphite reinforced with aramid fibers. In addition, we offer products such as "T9007-LC Naflon PTFE Low-Creep Gasket," which enhances wear resistance, creep resistance, thermal conductivity, and thermal dimensional stability, as well as "T1133 Clean Silk." 【Features】 <T1120 Clean Seal Top> ■ Usable for saturated steam at 2MPa ■ Sealing performance and chemical resistance comparable to asbestos joint sheets ■ Maximum outer diameter of φ2520, compatible with special shapes ■ Resistant to scratches and highly flexible *For more details, please refer to the PDF document or feel free to contact us.

• Piping Materials
• Other machine elements

"Polyvinyl Chloride (PVC)" is a widely used material among general-purpose plastics. Through years of research, it has been further lightweighted, and it has many advantages such as chemical resistance, weather resistance, and flame retardancy, making it suitable for use in decorative materials, plumbing, signage, and more. Additionally, due to its excellent cost-effectiveness and durability, it is used in a wide variety of fields. 【Features】 ■ Plasticity ■ Hardness can be freely changed by adding chemicals, allowing for various applications ■ High durability and weather resistance, suitable for outdoor use ■ Excellent chemical resistance and flame retardancy ■ Good cost performance and low price ■ Maximum operating temperature: 65°C (varies depending on usage conditions) *For more details, please refer to the PDF document or feel free to contact us.

• Piping Materials
• Other machine elements
• Other polymer materials

"MC Nylon" improves the properties of nylon by polymerizing and molding the main raw material, nylon monomer, under atmospheric pressure, resulting in excellent characteristics not found in injection-molded or extruded products. It is utilized as a large engineering plastic with a balanced resin characteristic. Additionally, it has high mechanical strength and maintains excellent material performance in tension, shear, and bending. 【Features】 ■ Wear resistance and self-lubricating properties ■ Good heat resistance and cold resistance ■ Electrical insulation properties ■ Excellent corrosion resistance and chemical resistance ■ Easy to machine *For more details, please refer to the PDF document or feel free to contact us.

• Piping Materials
• Other machine elements
• Other polymer materials

We are processing materials using various machines, including one of the largest water jets in Japan (processing range 4000W x 5800L). We would like you to visit our factory to see how packing and gaskets are made, the scale of our factory, and what materials can be processed. ★ We are also conducting test processing, so please feel free to contact us. We hope to provide information that can be of help to our customers.

• Piping Materials

At Daiko, we conduct test processing using one of Japan's largest water jets (processing range 4000W x 5800L). Various industrial products such as gaskets and packing (non-asbestos joint sheets, rubber, sponge, and resin) can be processed. "Features of Water Jet" 1. No thermal impact... Since tools like blades and drills do not touch the material, there is no heat generation. 2. Processing range... The processing range of 4000W x 5800L is one of the largest in the country. 3. No molds required... Unlike press processing, which requires molds and dies, water jet processing uses high-pressure water, so molds are not necessary. 4. Small lots... Since molds are not required, we can accommodate small lots without incurring high costs. "Water Jet Processing is Recommended for Those Who" 1. Cannot find processing services for large-diameter materials. 2. Want to test process using new materials. 3. Are troubled by changes or discoloration due to heat generation during processing. We hope to provide information that can be of help to our customers.

• Piping Materials

At Daiko Co., Ltd., we are offering a gasket fluid compatibility chart! Are you having trouble selecting gaskets and packing? With the transition from asbestos to non-asbestos, it has become difficult to choose the right type. We have compiled a list of compatible products from various manufacturers for your reference, and we hope you find it useful for your selection process. Please note that this is a guideline, and the suitable products may vary depending on the usage conditions, so feel free to contact us for more details.

• Piping Materials

This is a compatibility chart for rubber fluids. It lists the compatibility of various types of rubber, including natural rubber, neoprene rubber, NBR rubber, EPDM rubber, Viton rubber, and silicone rubber, with different fluids. While it is only a guideline, it serves as an example of systematic categorization. Please use it for selection purposes.

• Piping Materials

Nichias: This is a comparison table for fluid compatibility of Vulcargas gaskets. Asbestos joint sheets have versatile properties that allow them to cover a wide range of practical applications due to their excellent heat resistance and pressure resistance. However, as the transition away from asbestos progresses, a certain degree of categorization for usage applications will be necessary. The alternative flow shown below is merely a guideline, but it serves as an example of systematic categorization. Please use it for selection purposes.

• Piping Materials

"Features of Water Jet" A water jet is a water pressure cutting machine that uses high-pressure water as the cutting source. It can process various industrial products such as gaskets and packing (non-asbestos joint sheets, rubber, sponge, and resin). 1. No thermal effects... Since tools like blades and drills do not touch the material, there is no heat generation. 2. Processing range... The processing range is 4000W x 5800L, one of the largest in the country. 3. No molds required... Unlike press processing, which requires molds and dies, water jet processing does not need molds as it uses high-pressure water. 4. Small lot sizes... Since molds are not required, small lot sizes can be handled without incurring high costs. "Water jet processing is recommended for the following people" 1. Those who cannot find processing options for large-diameter products. 2. Those who want to test process using new materials. 3. Those who are troubled by changes or discoloration due to heat generation during processing. We hope to provide information that can be of help to our customers.

• Piping Materials

〇Processing Range ・1500W x 2500L (Plotter/Router) 〇Processing Features ・This is a cutting plotter that processes joint sheets, rubber, and resin. The machine's structure allows it to digitize drawings using the same CAD as a water jet and process them with a special carbide blade. With automatic control, it can cut straight lines, curves, and circular shapes freely. ・It also has router functionality, enabling a wide range of external contour cutting and recessed machining to accommodate various shapes according to needs. ※Testing and processing of various materials are possible.

• Piping Materials

〇 Processing Features - This machine tool was developed for applications that perform machining impossible with conventional blades or cutting tools by utilizing laser light for cutting and machining. Since it processes without contact, the material does not deform due to stress or pressure during machining. By linking with image processing software and directly transferring data to the machining machine, the process of creating molds or casts, which was previously necessary, is eliminated, allowing for a variety of machining options. 〇 Processing Range - 1200W x 2400L 〇 Product Examples - Metal products (gaskets, packing) - Resin products (acrylic, etc.) - Wood products *Various material test machining is possible.

• Piping Materials