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Plant maintenance and machinery maintenance gasket and packing product catalog

A product catalog of various gaskets for non-asbestos materials, featuring a comparison chart of manufacturers!

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.

  • Piping Materials

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Daiko high-temperature sleeve packing "D-2000" boiler component!

D-2000 High-Temperature Sleeve Packing Compared to conventional non-asbestos sleeve packing materials, it offers superior durability.

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
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Gasket Packing Q&A No. 1

We will answer your questions about the reuse of gaskets!

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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Gasket Packing Q&A No. 3

I will answer your questions about the differences between SUS316 and SUS316L!

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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Gasket Packing Q&A No. 6

Is there a material that can improve the creep phenomenon of Teflon?

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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Daiko manufactured gasket packing "D1000 spiral packing"

Excellent sealing capability that covers the usage range of asbestos joint sheets! It is a semi-metallic gasket that can be used in high temperature and high pressure lines!

"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.

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Daiko manufactured grand packing 'D4101 to 4106'

Teflon-impregnated carbonized fiber is a highly resilient gland packing made by combining Teflon and special lubricating oil with carbon fiber, using a special angle knitting method for impregnation.

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.

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Gasket Packing Q&A No. 2

I will answer your questions about the causes of leaks that occur during airtightness testing!

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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Gasket Packing Q&A No. 4

I will answer your questions about what to do if Teflon is hard and won't stop!

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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High temperature and high pressure gasket packing 'D1000(GR)'

Due to its heat resistance of 450°C and higher usable temperature compared to conventional products, leaks are less likely to occur! Since it is our own product, we can ship it on the same day at the earliest!

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.

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Biodegradable ceramic angle joint gasket and packing compatible with RCF.

This is a gasket made with ceramic biodegradable fibers that complies with RCF regulations! (Exhaust gas stack, boiler system gaskets, packing)

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

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Gasket Packing Q&A No. 5

What is the difference between Teflon cushions with felt and those without felt?

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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Gasket Packing Q&A No. 7

Have regulations been established for ceramic fiber-related products?

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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Gasket Packing Q&A No. 9: Gasket Surface Leakage Edition!

What causes leaks when using gaskets? - Surface leak edition -

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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D packing

Compared to punched rubber sheet gaskets, it has a more stable sealing performance at lower surface pressure!

The "D Packing" we handle is a gasket made by press-molding EPDM rubber into a specific cross-sectional shape. Its structure, featuring two O-ring shaped protrusions, demonstrates excellent sealing performance even at low tightening surface pressures. It can also be used with resin flanges and resin-lined flanges. Additionally, we offer the "D Packing PTFE Coated," which is made by press-heating and molding a PTFE film onto EPDM rubber molded products to create a bonded unit. 【Specifications】 ■ Maximum operating pressure: 0.98 MPa (approximately 10 kgf/cm³) ■ Operating temperature range: -40℃ to 100℃ ■ Available sizes: - 5K: 15A to 300A - 10K: 15A to 300A *For more details, please download the PDF or feel free to contact us.

  • Sealing

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