ダイコー List of Products and Services

Our company has been processing and selling gaskets, packing, and industrial products for over 45 years. We utilize various processing machines, including one of Japan's largest water jets (high-pressure cutting machines), plotters, and press processing, to propose products to our customers. Please feel free to contact us for any inquiries regarding processing. We performed multiple processes from the material T1995, 2t, 2540Wx3810L. We processed a combination of multiple ordered products and standard stock. There was minimal material loss, allowing for efficient processing. The T1995 has raw material available up to 3810Wx3810L, and processing is possible with Daiko's water jet.

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Our company has been processing and selling gaskets, packing, and industrial products for over 45 years. We utilize various processing machines, including one of Japan's largest water jets (high-pressure cutting machines), plotters, and press processing, to propose products to our customers. Please feel free to contact us for any inquiries regarding processing. We performed multiple processes from the material V6500 3t 2540Wx3810L. We processed large-diameter gaskets, including a full gasket with a diameter of Φ1550 and a frame packing of 800Wx1000L. This processing takes advantage of the water jet's processing range.

• Piping Materials

Our company has been processing and selling gaskets, packing, and industrial products for over 45 years. We use various processing machines, including one of Japan's largest water jets (high-pressure cutting machines), plotters, and press processing, to propose products to our customers. Please feel free to contact us for any inquiries regarding processing. We processed a 1-ton three-sheet. While equivalent processing is possible with water jet cutting, the plotter can process while vacuuming (keeping the material flat). Unlike water jets, it does not get wet. For these two reasons, processing with a plotter is suitable.

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Our company has been processing and selling gaskets, packing, and industrial products for over 45 years. We utilize various processing machines, including one of Japan's largest water jets (high-pressure cutting machines), plotters, and press processing, to propose products to our customers. Please feel free to contact us for any inquiries regarding processing. 〇 EPDM Frame 3t 260Wx1000L 28 pieces We conducted processing at night using water jet cutting. With water jet processing, by inputting CAD data and setting the materials, it is possible to automate the processing to some extent. Although the delivery time is short, we were able to ship the order the day after it was placed.

• Piping Materials

Our company has been processing and selling gaskets, packing, and industrial products for over 45 years. We use various processing machines, including one of Japan's largest water jet cutters (high-pressure cutting machines), plotters, and press processing, to propose products to our customers. Please feel free to contact us for any inquiries regarding processing. 【Processing Example】 We recreated a broken part from a beverage manufacturer based on the damaged component and incomplete drawings provided. Although there were some first-time processes, such as machining the seating on both sides, the finish of the cross-section was comparable to that of the original product.

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Our company has been processing and selling gaskets, packing, and industrial products for over 45 years. We utilize various processing machines, including one of Japan's largest water jets (high-pressure cutting machines), plotters, and press processing, to propose products to our customers. Please feel free to contact us for any inquiries regarding processing. 【Processing Example】 We processed Viton rubber with a thickness of t5. Since the hardness of the rubber is 80°, which is somewhat hard, we reduced the processing speed when using the water jet compared to regular rubber. This time, we set the speed to approximately 1000mm per minute. We also have other thicknesses of Viton rubber in stock, so please feel free to inquire.

• Piping Materials

Our company has been processing and selling gaskets, packing, and industrial products for over 45 years. We utilize various processing machines, including one of Japan's largest water jets (high-pressure cutting machines), plotters, and press processing, to propose products to our customers. Please feel free to contact us for any inquiries regarding processing. 【Processing Example】 We processed T1995 05t using a water jet. Although it has a small diameter and a special hole shape, we were able to process it within tolerance. We received an order for 1,100 pieces, but since the water jet allows for automatic processing, we were able to meet the desired delivery date.

• Piping Materials

Our company has been processing and selling gaskets, packing, and industrial products for over 45 years. We utilize various processing machines, including one of Japan's largest water jets (high-pressure cutting machines), plotters, and press processing, to propose products to our customers. Please feel free to contact us for any inquiries regarding processing. 【Processing Example】 We processed urethane rubber with a thickness of 10mm. The outer circumference and long holes were processed using a water jet. The chamfering was done with a chamfering machine. By changing the pit, we can also perform chamfering other than the 45° angle. Urethane rubber falls into the category of hard rubber, but it can be processed with a water jet.

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Our company has been processing and selling gaskets, packing, and industrial products for over 45 years. We use various processing machines, including one of Japan's largest water jets (high-pressure cutting machines), plotters, and press processing, to propose products to our customers. Please feel free to contact us for any inquiries regarding processing. 【Processing Example】 We processed 1 ton of Viton rubber, measuring 55W x 68.5L, with a slit of φ6-4. The slit is arranged radially, and there is a φ1 hole at the tip of the slit. Although the tolerance is for a small diameter, we were able to meet the customer's requirements. Careful consideration was also needed for data creation and work holding.

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Our company has been processing and selling gaskets, packing, and industrial products for over 45 years. We utilize various processing machines, including one of Japan's largest water jet cutters (high-pressure cutting machines) and plotters and press processing, to propose products to our customers. Please feel free to contact us for any inquiries regarding processing. 【Processing Examples】 We used 23mm neoprene rubber sheets to perform cutting processes such as edge beveling and recess machining. The router processing machine is specialized for gasket processing and is made in Germany, ensuring high processing accuracy and proficiency in cutting operations.

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There are several issues with joint sheets, but I will explain the most common case, which is compression failure. ◆Details of the problem 　〇Cracks occurred around the gasket, making it extremely thin. ◆Possible causes 　〇Compression failure due to excessive tightening. 　〇Excessive load applied to a part of the gasket due to lack of parallelism of the flange or deformation. 　〇Localized slippage of the joint sheet due to uneven application of paste. ◆Countermeasures 　〇Tighten without exceeding the allowable tightening surface pressure of the gasket. 　〇Problems caused by improper construction such as single-sided tightening, insufficient tightening, or excessive tightening. 　〇Correct the parallelism and deformation of the flange. 　〇When applying paste, apply it thinly and evenly.

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Our company has been processing and selling gaskets, packing, and industrial products for over 45 years. We utilize various processing machines, including one of Japan's largest water jet cutters (high-pressure cutting machines), plotters, and press processing, to propose products to our customers. Please feel free to contact us for any inquiries regarding processing. 【Processing Example】 〇 Neoprene rubber: We performed width cutting from a 5mm thick sheet to 7W x 10,000L. The width of 7mm is narrow compared to the 5mm material thickness, making the processing difficulty higher. We first cut at 70W and then produced 10 pieces of 7W x 10. We also performed winding simultaneously and finished with a lap wrap.

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This catalog is a comprehensive catalog (digest version) featuring products from Daiko Co., Ltd., which manufactures and sells various types of gaskets and industrial products. Our company processes gaskets and packing using various machines, including one of Japan's largest water jet cutting machines (hydro cutting machines). We have a wide range of items, including joint sheets, rubber, sponge, and resins. We also offer our original brand non-asbestos joint sheet "D-6000" and other products tailored to domestic manufacturers such as Nichias and Bulker. Please utilize the fluid compatibility charts and necessary information for selecting piping and valves! 【Featured Products (Partial)】 ■ Non-asbestos joint sheet D-6000 ■ Graphite spiral wound gasket D-1000 ■ Teflon cushion gasket D7000 ■ SGM soft Teflon gasket ■ Rubber packing, etc. *This PDF is a digest version. If you need the full version, please feel free to contact us.

• Other processing machines
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Our company has been processing and selling gaskets, packing, and industrial products for over 45 years. We offer a variety of processing machines, including one of Japan's largest water jets (high-pressure cutting machines), plotters, and press processing, to propose products to our customers. Please feel free to contact us for any inquiries regarding processing. 【Processing Example】 For a full EPDM rubber gasket, we adhered rubber sheets in an L-shape, and for the inside of the bolts, we cut round cords in half and adhered them to create a rib-like structure. Achieving precise half-cutting of the round cords is challenging, but we finished the processing with a tolerance of about 0.1 using a slitter.

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Our company has been processing and selling gaskets, packing, and industrial products for over 45 years. We utilize a variety of processing machines, including one of Japan's largest water jets (high-pressure cutting machines), plotters, and press processing, to propose products to our customers. Please feel free to contact us for any inquiries regarding processing. 【Processing Example】 We processed a neoprene sponge sheet into four parts using a water jet, bonded the corner sections, and shaped it into a frame. This method results in less material waste compared to processing as a single piece, allowing for cost reduction. We process using CAD data, enabling precise machining of bolt positions and other details.

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Our company has been processing and selling gaskets, packing, and industrial products for over 45 years. We use various processing machines, including one of Japan's largest water jets (high-pressure cutting machines), plotters, and press processing, to propose products to our customers. Please feel free to contact us for any inquiries regarding processing. 【Processing Examples】 We cut a neoprene rubber sheet to the required length using a water jet and processed it into a cylindrical shape with adhesive. The smaller the diameter, the more material rebound occurs, increasing the difficulty of production. When processing as a single piece, it requires processing from a rubber sheet with a thickness of 60mm, and the machines that can handle this are limited. If adhesive processing is possible, we can offer it at a low cost.

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■ジョイントシート、選定時の注意点を説明させて頂きます。 　〇低圧フランジ（ＪＩＳ　２Ｋ, ５Ｋ　等）には適さない。 　　→必要な締付面圧が得られない 　〇ＦＦフランジでもリング状ガスケットを用いる 　　→必要な締付面圧が得られない 　〇フランジ表面の仕上げ精度　　液体　6.3μmRa以下 　　　　　　　　　　　　　　　 ガス 3.2μmRa以下

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

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Our company has been processing and selling gaskets, packing, and industrial products for over 45 years. We utilize various processing machines, including one of Japan's largest water jet cutters (high-pressure cutting machines), plotters, and press processing, to propose products to our customers. Please feel free to contact us for any inquiries regarding processing. 【Processing Example】 We manufactured an O-ring with a wire diameter of Φ24 x IDφ1646 by adhesive processing from round cord. The adhesive surface was cut at an angle to increase the bonding area, allowing for a stronger adhesion. Although the wire diameter was thick and the size was large, it was finished to the specified dimensions. O-rings are typically produced through heat vulcanization compression molding, but we may also process them by adhesive methods from round cord based on customer requests.

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Our company has been processing and selling gaskets, packing, and industrial products for over 45 years. We utilize various processing machines, including one of Japan's largest water jet cutters and plotter and press processing, to propose products to our customers. Please feel free to contact us for any inquiries regarding processing. 【Processing Example】 〇 T9007LC 3mm PTFE with filler was processed using a plotter. By using a special ultra-hard blade for processing, the cross-section of the gasket is finished beautifully. We can accommodate processing ranges up to 1500W, allowing for large-diameter processing to be completed in a short delivery time. This is a high-performance gasket that is resistant to heat up to 200°C and has low creep.

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Our company has been processing and selling gaskets, packing, and industrial products for over 45 years. We utilize various processing machines, including one of Japan's largest water jet cutters and plotters, to propose products to our customers. Please feel free to contact us for any inquiries regarding processing. 【Processing Example】 We performed width cutting on 3mm neoprene rubber (50WX10M) using a slitter. This machine specializes in processing rubber strips. The width setting can be easily changed by adjusting the position of the blade. Depending on the material, processing of over 10M is also possible.

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Generally, the tightening force required to seal internal fluids is indicated by Wm1 and Wm2 as specified in JIS B 8265.

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

• Piping Materials

Our company has been processing and selling gaskets, packing, and industrial products for over 45 years. We utilize various processing machines, including one of Japan's largest water jets (high-pressure cutting machines), plotters, and press processing, to propose products to our customers. Please feel free to contact us for any inquiries regarding processing. 【Processing Examples】 We manufactured Teflon (PTFE) ring shapes and gaskets for heat exchangers. The size is over 1000mm in diameter, but with a water jet, we can achieve tolerances of approximately ±0.2 to 0.3. For heat exchangers, we can also digitize intricate details such as R processing on branch parts using CAD, allowing us to produce gaskets that fit the flange size.

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Our company has been processing and selling gaskets, packing, and industrial products for over 45 years. We use various processing machines, including one of Japan's largest water jet cutters (high-pressure cutting machines), plotters, and press processing, to propose products to our customers. Please feel free to contact us for any inquiries regarding processing. 【Processing Example】 We processed a cross-shaped packing measuring 18WX18L from 50° 1t silicone rubber. The water jet is a large machine with dimensions of W4000 x L5000mm, but we are also skilled in processing small diameters.

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

• Piping Materials

There are various factors that can cause leaks when using gaskets, but this time I will explain about permeation leaks. ◆ What is permeation leak? 　〇 A phenomenon where the sealing material is permeated, causing the internal fluid to leak. ◆ Countermeasures 　〇 Increase the density of the sealing material by compressing it with tightening force to fill the tiny gaps inside the sealing material. ◆ Requirements for sealing materials 　　〇 Density 　　〇 Resistance to permeation 　　〇 Applying rubber or resin-based paste materials to the inner diameter end face is also effective.

• Piping Materials

[Daiko Communication] We will provide you with 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

Our company has been processing and selling gaskets, packing, and industrial products for over 45 years. We utilize various processing machines, including one of Japan's largest water jet cutters (high-pressure cutting machines) and plotters and press processing, to propose products to our customers. Please feel free to contact us for any inquiries regarding processing. 【Processing Examples】 We processed a cross-shaped packing of 18WX18L using silicone rubber 50°1t. The water jet is a large machine measuring W4000X L5000mm, but we are also skilled in processing small diameters.

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Our company has been processing and selling gaskets, packing, and industrial products for over 45 years. We utilize various processing machines, including one of Japan's largest water jets (high-pressure cutting machines), plotters, and press processing, to propose products to our customers. Please feel free to contact us for any inquiries regarding processing. 【Processing Example】 〇 Neoprene rubber 3mm φ2325 x φ2072 bolt hole processing. Since the processing size is larger than the width of the material, we performed split processing with a water jet and then joined the pieces with adhesive. Large diameter processing can also be efficiently cut using water jet processing. Please feel free to inquire about the types of adhesives and methods of adhesion! Our experienced staff will assist you.

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There are various factors that can cause leaks when using gaskets, but this time I will explain about interface leaks. ◆ What is an interface leak? It is a phenomenon where internal fluid leaks through the interface between the sealing material and the opposing surface (such as a flange or shaft). ◆ Countermeasures Fill the minute gaps between the sealing material and the opposing surface with clamping force. ◆ Requirements for sealing materials - Compatibility - Resilience (to respond to pressure drop due to vibrations, thermal loads, etc. during operation, and to prevent the occurrence of minute gaps)

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Our company has been processing and selling gaskets, packing, and industrial products for over 45 years. We utilize various processing machines, including one of Japan's largest water jets (high-pressure cutting machines), plotters, and press processing, to propose products to our customers. Please feel free to contact us for any inquiries regarding processing. 【Processing Examples】 Using two sheets of V6500 3t 2540W x 3810L material with a water jet, we processed various sizes of custom and standard products. By efficiently assembling CAD data, we minimize material waste to the utmost limit. Because there is less material waste, we can offer our customers low-cost proposals.

• 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 publish changes in gasket and packing specifications due to legal revisions, as well as new products from manufacturers!

• Piping Materials

SGM gaskets are revolutionary non-asbestos joint sheet gaskets made of 100% PTFE, featuring excellent heat resistance and chemical resistance, as well as a combination of strength and flexibility. They possess 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.

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◆Issue Details 　　〇When using the joint sheet as a gasket and conducting a leak test, the leakage does not stop. ◆Possible Factors 　　〇The gasket shape is FF type → Insufficient surface pressure 　　〇No paste applied → Gas permeates 　　〇Thickness is 3.0 mm → Gas is prone to permeation, significant stress relaxation ◆Countermeasures 　　〇Change the gasket shape to ring type (inner packing) 　　〇Apply gasket paste to the flange contact surface and inner diameter end face 　　〇Reduce gasket thickness to 1.5 mm (especially for smaller sizes, below 200A)

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Daiko specializes in a wide range of products focused on boiler components. If you are having trouble with suppliers, please feel free to contact us. ■ Gaskets and packing in general ■ Reference list of boiler parts ■ Joint sheets ■ Teflon products ■ D-1000 spiral gaskets ■ Soft seals ■ D-5800 ceramic fiber spun products ■ D-5400 glass fiber spun products ■ D-2000AB-18 / Graphite-filled AB18 ■ D-2000 gland packing / valve rings ■ Reflective glass / transparent glass ■ Packing for water level gauges ■ Round glass tubes / graphite rings / rubber rings ■ Boiler parts

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Daiko Corporation will answer your questions regarding gaskets and packing. 〇 About RCF (Refractory Ceramic Fiber) Regulations In November 2015, the Specific Chemical Substance Hazard Prevention Regulations were amended and enforced, leading to regulations concerning the handling of RCF. The purpose is to strengthen measures to prevent health hazards for workers related to refractory ceramic fibers. The "Ordinance to Partially Amend the Enforcement Order of the Labor Safety and Health Act" (Ordinance No. 294 of 2015) was promulgated on August 12, 2015, and the "Ministry of Health, Labor and Welfare Ordinance to Partially Amend the Labor Safety and Health Regulations" (Ordinance No. 141 of 2015) was promulgated on September 17, 2015. 〇 Transition to Biodegradable Ceramic Fibers In response to the regulations, we have changed the conventional ceramic fibers to biodegradable ceramic fibers developed to have solubility even when they enter the body. In terms of performance, the only difference is between fibers that dissolve in biological water (RCF-compliant products) and those that do not dissolve (RFC non-compliant products). We guarantee that there are no products that are inferior in performance compared to existing products.

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This catalog is a comprehensive catalog (digest version) featuring products from Daiko Co., Ltd., which manufactures and sells various types of gaskets and industrial products. Our company processes gaskets and packing using a variety of machines, including one of Japan's largest water jet cutting machines (hydro-cutting machines). We also have a wide range of items, including joint sheets, rubber, sponge, and resins. Our original brand, the non-asbestos joint sheet "D-6000," is among our well-developed products. Please utilize the fluid compatibility tables and necessary information for selecting piping and valves! 【Featured Products (Partial)】 ■ Non-asbestos joint sheet D-6000 ■ Graphite spiral wound gasket D-1000 ■ Teflon cushion gasket D7000 ■ SGM soft Teflon gasket ■ Rubber packing, etc. *This PDF is a digest version. If you need the full version, please feel free to contact us.

• Other processing machines
• Piping Materials

This catalog features products from Daiko Co., Ltd., which manufactures and sells various types of gaskets and industrial products. Our company processes gaskets and packing using a variety of machines, including one of Japan's largest water jet cutting machines. We also have a wide range of items such as joint sheets, rubber, sponge, and resins. Our original brand, the non-asbestos joint sheet "D-6000," is among our well-developed products. 【Featured Products】 ■ Non-asbestos Joint Sheet D-6000 ■ Graphite Spiral Gasket D-1000 ■ Teflon Cushion Gasket D-7000 ■ SGM Soft Teflon Gasket ■ Rubber Packing, etc. *This PDF is a digest version. Please feel free to contact us if you need the full version.

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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.

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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.

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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.

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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.

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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.

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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.

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