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"I want to respond with higher reliability in piping lines that handle utility lines such as steam and oil at temperatures above 100°C, as well as chemical substances. I need gaskets that have excellent long-term stability and minimal creep (deformation) even under high temperatures." In extremely harsh environments such as chemical plants, semiconductor manufacturing, and pharmaceutical processes, there are situations where the performance of standard fluoropolymer (PTFE) gaskets falls short. To meet these top-level demands, Vulcan Corporation has developed the flagship model of high-performance fluoropolymer gaskets, "No.GF300," by consolidating years of sealing technology. This article will thoroughly explain why the GF300 is referred to as the "pinnacle," from its unique material technology that supports its performance to important precautions for safe use, from a professional perspective. *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.*

A very familiar sealing material that supports the stable operation of plants is the "joint sheet gasket." Due to its versatility and high cost performance, it is widely used in various settings, primarily in utility lines such as water, oil, and air. However, behind its ease of use lies a specific weakness of the material and strict rules that can lead to serious leakage accidents if used incorrectly. In this article, we will thoroughly explain the "common precautions" that everyone on site should know in order to use joint sheets safely and stably over the long term, from a professional perspective. In particular, we will focus on the "100°C barrier," which is a common cause of many troubles, and delve deeply into its countermeasures. *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.*

"Despite using stainless steel piping, unexpected flange corrosion and cracking have occurred." "I want to ensure longer-term safety in water and steam lines." Behind these on-site challenges often lies the unique corrosion mechanisms associated with stainless steel. A seemingly minor mistake in gasket selection can frequently lead to significant equipment damage. This article will elucidate the hidden risk of "stress corrosion cracking" in the sealing of stainless steel piping and thoroughly explain the significance and proper use of the Clean Joint Sheet "No.6500AC," developed by Valkar Co., Ltd., as a specialized countermeasure. *For detailed content of the column, please refer to the related link. For more information, feel free to download the PDF or contact us directly.*

"When we used a standard gasket on the steam line, it hardened immediately and started leaking." "I want to extend the maintenance cycle around the boiler." To address these urgent issues, especially in environments involving high-temperature steam and hot water, the high-performance joint sheet developed by Vulcan Corporation is the "No.6502 Black Hyper." In this article, we will thoroughly explain why No.6502 has gained immense trust in harsh hot water and steam lines, covering the material technology that supports its performance, the tightening management that must be strictly adhered to for safe use, and the response to special processing, all from a professional perspective. *For detailed content of the column, please refer to the related links. For more information, you can download the PDF or feel free to contact us.*

In ensuring the stable operation and safety of plants, the selection and handling of gaskets, which are sealing materials for piping flange sections, play an extremely important role. Among the diverse range of products available, this time we will focus on the fluoropolymer (PTFE) gasket "TOMBO No.9007-LC," which combines excellent chemical resistance with groundbreaking low creep characteristics, and thoroughly explain its details. This article aims to assist field engineers and maintenance personnel in solving the challenges they will face in their work starting tomorrow, delving deeply into practical aspects from the product features to the "precautions" that must be observed on-site. *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 the stable operation of plants, ensuring the sealing of utility lines such as water, oil, and steam is extremely important. Especially under high-temperature conditions, the performance of gaskets directly affects the reliability of equipment. The "TOMBO No.1155 Clean Seal Next" provided by Nichias Corporation is a sheet gasket that significantly improves reliability in high-temperature areas, addressing the challenges of conventional fluoropolymer gaskets while primarily composed of PTFE. This article will provide a detailed explanation of its excellent features and performance based on product data. *For more detailed information, you can view it through the related links. For further details, please download the PDF or feel free to contact us.*

Fluid leaks from piping in plants and factories, as well as from the flange parts of various equipment, can sometimes lead to significant troubles. An essential component to reliably prevent such leaks is the "sheet gasket." However, gaskets are not simply something that can be inserted. To fully utilize their performance and maintain stable sealing capabilities over the long term, there are important precautions that must be observed from storage to selection, installation, and maintenance. In this article, we will provide a detailed explanation of a series of precautions regarding the handling of sheet gaskets that will be indispensable on-site, following a step-by-step approach. *For detailed content of the column, please refer to the related links. For more information, you can download the PDF or feel free to contact us.*

Are you facing any of these concerns: 'I don't know which joint sheet to choose,' 'I'm using a standard product, but it's deteriorating quickly and it's a problem,' or 'I want to achieve higher safety and longer lifespan'? The joint sheet gaskets provided by Nichias Corporation range from general-purpose to high-performance options. In this article, we will focus on three representative grades: the standard product 'No.1995,' the heat-resistant reinforced type 'No.1993,' and the high-grade product 'No.1120,' thoroughly comparing and explaining the differences in their performance and the correct selection methods. *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.

"We are troubled by the rapid deterioration of the gaskets in the steam line. With standard joint sheets, hardening due to hot water occurs quickly, necessitating frequent replacements." To address these on-site challenges, Nichias Corporation has developed the steam-resistant reinforced joint sheet gasket "TOMBO No.1993 (Clinsil Super)." In this article, based on technical materials from Nichias, we will thoroughly explain why No.1993 is suitable for steam lines, the secrets behind its excellent performance, the correct selection and usage methods, and how to accommodate special processing. *For detailed content of the column, please refer to the related links. For more information, you can download the PDF or feel free to contact us.*

"In standard joint sheets, deterioration due to heat and steam occurs quickly." "I want higher reliability against corrosive fluids." Responding to such voices from the field is Nichias Corporation's proud high-grade joint sheet gasket, "TOMBO No.1120 (Clean Seal Top)." In this article, based on technical materials from Nichias, we will thoroughly explain why No.1120 is chosen under harsh conditions, the secrets of its excellent performance, the correct selection and usage methods, and how it accommodates special processing. *For detailed content of the column, please refer to the related links. For more information, feel free to download the PDF or contact us.

"In the utility line of the factory, which gasket is standard and highly reliable?" "I want to select sealing materials that offer excellent cost performance against water and oil." The product that truly meets these basic needs on site and can be called a "standard" is the general-purpose joint sheet gasket "Vulcan No. 6500," provided by Vulcan Corporation for many years. In this article, based solely on the official catalog information provided by Vulcan, we will thoroughly explain why No. 6500 continues to be chosen as a standard product in many workplaces, from its basic performance to the important precautions that must be strictly followed for safe use, from a professional perspective. *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.*

Pure fluoropolymer (PTFE) gaskets are widely used in many chemical lines due to their excellent chemical resistance. However, conventional PTFE sheets have a significant challenge: they are prone to "creep (stress relaxation)" and lack long-term sealing stability. To overcome this weakness, Nichias Corporation has developed the "TOMBO No.9096-SGM" (SGM gasket) using special manufacturing technology. This article thoroughly explains the performance of this "high-strength stretched PTFE gasket," which overturns the conventional wisdom of PTFE, as well as important considerations to maximize its capabilities. We aim to assist field engineers and maintenance personnel in solving sealing challenges under more severe conditions. *For detailed content of the column, please refer to the related links. For more information, feel free to download the PDF or contact us.

"Joint sheets (gaskets)" are widely used in piping systems of factories and plants. Due to their versatility and cost-effectiveness, they are commonly adopted in many sites. However, to fully utilize their performance and prevent leakage issues, it is essential to correctly understand the product's characteristics and to select and handle them appropriately according to the usage conditions. In this article, based on technical materials from Nichias Corporation, we will thoroughly explain the correct way to choose joint sheets, focusing on the representative TOMBO No.1995 (Clinsil Brown), as well as important precautions that must be observed on-site. *For detailed content of the column, please refer to the related links. For more information, you can download the PDF or feel free to contact us.*

Special and harsh environments that cannot be addressed by standard gaskets, such as high temperatures exceeding 450°C, extreme low temperatures, or highly oxidative fluids. The sealing performance under such conditions is a critical issue that affects the safety and productivity of the plant. Careless product selection can lead to immediate leakage accidents. In this article, based on technical materials from Nichias Corporation, we will thoroughly explain the correct selection methods for vortex gaskets and metal gaskets in special environments, as well as important points to maximize their performance. *For detailed content of the column, please refer to the related links. For more information, you can download the PDF or feel free to contact us.

In plants where reliable sealing performance is required under harsh conditions such as high temperature and high pressure, "vortex gaskets" (spiral gaskets) are one of the most trusted sealing materials. However, to maximize their high performance, it is essential to have a deep understanding of the product's structure and to make extremely precise selections tailored to the usage conditions. This article comprehensively explains the correct selection methods from the complex product system of vortex gaskets, as well as precautions to prevent troubles, based on technical materials from Nichias Corporation. *For detailed content of the column, please refer to the related links. For more information, feel free to contact us.*

In chemical plants and lines handling corrosive fluids, the selection of seals is the most critical issue that affects the safety and lifespan of equipment. Among them, the "fluororesin (PTFE) gasket," which boasts excellent chemical resistance, is an indispensable component. However, to fully leverage its high performance, a deep understanding of the product's structure and extremely precise selection tailored to the usage conditions are required. This article comprehensively explains the complex selection methods, processing, and usage precautions, focusing particularly on the "TOMBO No.9010 Naflon PTFE cushion gasket," which has a wide variety of combinations, based on technical materials from Nichias Corporation. *For detailed content of the column, please refer to the related links. For more information, feel free to contact us.*

In piping flanges of plants and factories, completely preventing fluid leakage is an absolute requirement for safe operation and stable production. To fully utilize the performance of the "gasket," which can be considered the heart of the system, it is essential not only to select the appropriate material for the product but also to choose the right type of flange and implement proper tightening management based on scientific evidence. In this article, we will thoroughly explain specialized knowledge from gasket selection to processing and installation based on technical materials from Nichias Corporation, in a way that can be practically applied on-site. *For detailed content of the column, please refer to the related links. For more information, feel free to contact us.

"Leaks from the piping won't stop," "I don't know which flange or gasket to choose," "I'm struggling with the balance between cost and safety." Piping systems support factories, plants, and social infrastructure. The key to their stable operation lies in the "flanges" that connect pipes and equipment. While they may seem like simple components at first glance, choosing the wrong one can lead to production stoppages, environmental pollution, and even serious accidents. This article comprehensively explains everything from the basic knowledge of flanges to practical selection points for all individuals involved in the design and maintenance of piping systems, including engineers and purchasing personnel. You will learn about the differences in types and standards, the seat shape that affects sealing performance, and most importantly, how to select the right gasket. By reading this article, you will understand it all. *For detailed content of the column, please refer to the related links. For more information, feel free to contact us.*

We would like to introduce a processing case of "V6502 Black Super" conducted by Daiko Co., Ltd. Based on the customer's drawings, we manufactured a flange gasket for 10K-50A from a 3mm thick non-asbestos joint sheet "Vulcan No. V6502 (Black Super)." It was processed into a shape with handles using a water jet cutting machine. Having handles makes it easier to handle and manage the installation of the gasket. Additionally, since the handles protrude outside the flange, it helps prevent human error by forgetting to insert the gasket. [Case Overview] - Material: Vulcan No. V6502 (Black Super) - Product: Flange gasket for 10K-50A (with handles) - Work Details: Processed into a shape with handles using a water jet cutting machine *For more details, please download the PDF or feel free to contact us.

We would like to introduce a case study of water jet processing of "EPDM rubber" that our company conducted. In this case, based on the drawings provided by the customer, we manufactured a large diameter flange gasket with an outer diameter of φ600mm and an inner diameter of φ500mm from a 4mm thick EPDM rubber sheet. The processing involved drilling 14 bolt holes of φ12mm on a P.C.D. of 550mm, using our water jet cutting machine to achieve high precision cutting according to the data. 【Case Overview】 ■ Material: 4mm thick EPDM rubber sheet ■ Product: Large diameter flange gasket with an outer diameter of φ600mm and an inner diameter of φ500mm ■ Processing details: Drilling 14 bolt holes of φ12mm on a P.C.D. of 550mm *For more details, please download the PDF or feel free to contact us.

We would like to introduce a case study of water jet processing of our heat-resistant glass cloth "D5400." Based on the DXF data provided by the customer, we manufactured a gasket measuring 62.5mm square from the 3.2mm thick "D5400." Using a water jet cutting machine, we precisely cut the outer shape and inner holes according to the data. Materials like glass cloth, which are soft and prone to fraying, can be finished beautifully when cut with water. [Case Overview] ■ Material: 3.2mm thick heat-resistant glass cloth "D5400" ■ Product: 62.5mm square gasket ■ Work Details - High-precision cutting of the outer shape and inner holes according to the data provided by the customer. *For more details, please download the PDF or feel free to contact us.

In the design and maintenance of piping for plants and equipment, gasket selection is extremely important yet one of the most challenging tasks. In particular, confirming compatibility with "fluids" (chemical resistance) is the first hurdle in the selection process. The types of fluids vary widely, including water, oil, gas, and corrosive fluids (acids and alkalis). If the selection is incorrect, there is a risk of serious accidents or production stoppages due to leaks. To solve the "problems" faced by busy design and maintenance personnel, Daiko Co., Ltd., a gasket expert, has prepared a truly useful "Fluid Compatibility Table" as a free white paper (PDF document) for the field. *For more details on the column, you can view it through the related links. For further inquiries, please feel free to contact us.

We would like to introduce a case where a gasket for a pump was manufactured from a non-asbestos joint sheet "Vulcan No. 6500" with a thickness of 2mm, based on the customer's drawing. The shape was complex, based on a ring with a diameter of φ180mm × φ115.4mm, featuring notches and multiple bolt holes (16 holes/32 holes). Using our water jet cutting machine, we cut directly from CAD data with high precision. 【Case Overview】 ■ Material: Vulcan No. 6500 ■ Product: Gasket for pump ■ Shape ・ Based on a ring with a diameter of φ180mm × φ115.4mm ・ Complex shape with notches and multiple bolt holes (16 holes/32 holes) ■ Processing Method ・ Cut directly from CAD data with high precision using a water jet cutting machine *For more details, please download the PDF or feel free to contact us.

"I want a large-diameter gasket that is not a standard product." "I want a one-off item precisely processed from the drawing." "I want to quickly confirm the tightening torque for the JIS flange needed for construction." "It takes time to find equivalent products from Nichias or Vulcan." These requests for "custom processing" and the concerns about "selecting standard products." At Daiko, a specialized manufacturer of gaskets and packing, both can be resolved with this one comprehensive catalog. Our company is a processing manufacturer of industrial products with over 50 years of experience. We go beyond mere product sales and respond to various challenges faced by our customers with our technical expertise. *For detailed content of the column, please refer to the related links. For more information, please feel free to contact us.

The stable operation of boiler equipment is the foundation of various industries. On the other hand, due to the harsh environment of high temperature and high pressure, consumable parts such as water level gauges, valves, and piping flanges require regular inspections and prompt replacements. However, when selecting parts, challenges such as "not being able to arrange genuine parts in time," "not knowing compatible parts from other manufacturers," and "not knowing where to order custom gaskets" are always present. To everyone involved in the maintenance and upkeep of boilers, we have prepared the Daiko Co., Ltd. 【Boiler Parts Catalog】 (free PDF), which condenses the necessary parts selection, technical data, and a "manufacturer comparison chart" into one book. *For detailed content of the column, please refer to the related links. For more information, feel free to contact us.

"The manhole packing of the incinerator deteriorates quickly at high temperatures." "I can't find a large-diameter gasket that fits the corner flange of the exhaust duct." "For the hot air line of the dryer, I don't need high airtightness, but I want a sealing material that is heat-resistant." Are you struggling to address the sealing and insulation challenges unique to high-temperature, low-pressure exhaust systems with general-purpose gaskets like joint sheets? Maintenance of high-temperature hot air and exhaust lines requires specialized properties such as "heat resistance," "flexibility," and "workability." To solve these issues, Daiko Co., Ltd., a specialized manufacturer of industrial gaskets, has prepared a free PDF catalog focused on the maintenance of high-temperature equipment such as exhaust systems, boilers, and dryers. *For more details on the column, please refer to the related links. Feel free to contact us for more information.

We would like to introduce a case where a frame-shaped gasket was produced from graphite-treated glass cloth "D5400" with a thickness of 3.2mm, based on the customer's drawing. The size is 300mm × 350mm with a width of 45mm, and the processing involved drilling 14 bolt holes with a diameter of 15mm. Using our water jet cutting machine, we achieved high precision cutting directly from CAD data. The glass cloth has been rubber-coated and further treated with graphite on the surface to prevent burning onto the flange, resulting in a non-asbestos heat-resistant gasket. It has excellent thermal insulation properties and can withstand high temperatures up to 400°C. 【Case Summary】 ■ Material: D5400 Glass Cloth Gasket ■ Product: Frame-shaped Gasket ■ Dimensions: 300mm × 350mm, 45mm width ■ Processing Details: Drilling 14 bolt holes with a diameter of 15mm ■ Processing Method: - High precision cutting using a water jet cutting machine directly from CAD data *For more details, please download the PDF or feel free to contact us.

We would like to introduce a case where we produced 10 pieces of a strip-shaped gasket measuring 15mm × 350mm from a 5mm thick NBR rubber sheet based on the customer's drawing. After precisely cutting it with our water jet cutting machine, we applied tape processing on one side before delivery. The greatest feature of NBR (nitrile rubber) is its overwhelming stability in oil environments. It has excellent oil resistance, abrasion resistance, and aging resistance, along with mechanical reliability. Due to these properties, it is widely used in various industrial applications involving oil, such as oil seals, gaskets, and oil-resistant hoses. [Case Overview] - Material: 5mm thick NBR rubber sheet - Product: 10 gaskets - Shape: Strip shape of 15mm × 350mm - Processing details: - Precisely cut with a water jet cutting machine, then tape processing was applied on one side. *For more details, please download the PDF or feel free to contact us.

We would like to introduce a case where we manufactured a D1000 spiral gasket (thickness 4.5mm) for an oval opening (300mm×400mm, seal width 25mm) based on the customer's drawing. It prevents leaks of high-temperature and high-pressure steam or hot water. In this case, we produced a V-shaped cross-section metal hoop and filler, which is the sealing material, with high precision using a dedicated winding machine. The spiral gasket is a high-performance semi-metallic gasket that is rationally designed for high temperature and high pressure applications. We can also manufacture spiral gaskets with special shapes based on the customer's drawings and specifications. Please feel free to contact us. 【Case Overview (Partial)】 ■ Material: D1000 ■ Product: Spiral gasket ■ Shape: Oval (300mm×400mm, seal width 25mm) *For more details, please download the PDF or feel free to contact us.

We would like to introduce a case where we manufactured six large frame-shaped gaskets measuring 680mm square and 60mm wide from a 3mm thick non-asbestos joint sheet "D6000" based on the customer's drawings. The processing involved drilling seven holes with a diameter of 8mm and twenty-four holes with a diameter of 19mm. We used a water jet cutting machine to cut directly from CAD data with high precision. Our company specializes in the production of complex-shaped gaskets based on drawings using water jet cutting machines. We can accommodate a wide range of requests, from a single prototype to complex shapes and short delivery times. Please feel free to contact us. 【Case Overview】 ■ Material: 3mm thick non-asbestos joint sheet "D6000" ■ Product: Six large frame-shaped gaskets ■ Shape: 680mm square, 60mm wide ■ Processing details: Drilling seven holes with a diameter of 8mm and twenty-four holes with a diameter of 19mm ■ Processing method: High-precision cutting directly from CAD data using a water jet cutting machine *For more details, please download the PDF or feel free to contact us.

We would like to introduce a case where we manufactured three "D1000 spiral gaskets (basic type)" (thickness 4.5mm, φ65×φ51) as high-temperature and high-pressure gaskets based on the customer's specifications. A metal hoop with a V-shaped cross-section and a sealing material filler (such as expanded graphite) were precisely wound into a spiral shape using a dedicated winding machine, and the start and end points were securely fixed with spot welding. Our company specializes in the production of spiral gaskets, which are essential for high-temperature and high-pressure steam lines and process lines. We can accommodate a wide range of requests, from small lot orders to consultations on special materials and dimensions. Please feel free to contact us. [Case Overview (Partial)] ■ Material: D1000 ■ Product: 3 spiral gaskets ■ Dimensions: Thickness 4.5mm, φ65 × φ51 *For more details, please download the PDF or feel free to contact us.

Leakage from gaskets in plant and factory piping flanges is a serious issue that directly leads to production stoppages, energy losses, and significant safety accidents. Many of these troubles are caused by "inadequate management of tightening force," that is, poor construction. In this article, we will explain why "torque management" is essential for gasket sealing, the fundamental theory behind it, and an overview of the three common types of tightening failures (insufficient, excessive, and uneven tightening) along with their examples and countermeasures. *For detailed content of the column, please refer to the related links. Feel free to contact us for more information.*

In the industrial sector, there are extreme high-temperature and high-pressure areas that cannot be reached with composites made of rubber, resin, or non-metals, such as plants, offshore facilities, and pressure vessels. To contain fluids with absolute reliability under such harsh conditions, the "metal gasket," composed entirely of metal, was designed, with the "ring joint gasket" being a representative example. In this article, based on the official product documentation from Vulcan, we will thoroughly explain why ring joint gaskets exhibit high sealing performance, the secrets of their structure, the differences between the two important shapes, "octagonal" and "oval," and the correct material selection and usage to fully utilize their capabilities. *For detailed content of the column, please refer to the related links. For more information, feel free to contact us.

"Rubber gaskets and packing" support the performance and safety of equipment. However, even when grouped under "rubber," there are many types, each possessing completely different characteristics (such as oil resistance, weather resistance, heat resistance, etc.). If this selection is incorrect, it can lead to serious issues such as "rubber swelling due to oil" or "cracking due to ozone." In this article, we will compare and explain the characteristics of nine major types of rubber materials, providing the foundation for a "selection guide" to help you choose the right product for your application. *For more detailed information, please refer to the related links. Feel free to contact us for further inquiries.*

We would like to introduce a processing case where a large product measuring 310mm × 1466mm was created from a special material made by bonding a PTFE sheet to an EPDM rubber block with a thickness of 55mm. This product is a high-performance composite that combines the elasticity and weather resistance of EPDM rubber with the chemical resistance and slip properties of PTFE. The part in contact with liquids is made of PTFE, which is strong against chemicals, while the main body is made of EPDM, providing a solid elastic sealing function. Using our water jet cutting machine, we achieved high-precision cutting of bonded materials with different hardness levels without delaminating the adhesive surfaces. [Case Overview] ■ Processing Details: Drilling a hole with a diameter of 194mm and chamfering the corners with C15 ■ Material: Laminated product of EPDM (55t) + PTFE (1t) *For more details, please download the PDF or feel free to contact us.

This is a case of producing 500 ring gaskets with an outer diameter of φ55mm and an inner diameter of φ43mm from the gasket sheet "TOMBO No.9007-SC," which is compatible with strong alkaline fluids. "TOMBO No.9007-SC" is a special gasket sheet made by blending carbon with PTFE (fluororesin). It exhibits excellent corrosion resistance against strong alkaline fluids such as sodium hydroxide and potassium hydroxide. Using our plotter processing machine, we were able to respond quickly to the production of 500 medium-lot items directly from CAD data without the need to create a die. [Case Overview] ■ Material: TOMBO No.9007-SC 1.5t ■ Size: Outer diameter φ55mm × Inner diameter φ43mm ■ Quantity: 500 pieces *For more details, please download the PDF or feel free to contact us.

In manufacturing environments where "hygiene management" is the top priority, such as in food, beverages, pharmaceuticals, and cosmetics, the selection of rubber components (gaskets, seals) used is extremely important. This is because it is not only about preventing leaks but also about ensuring safety for the human body (compliance with regulations) and significantly reducing the risk of foreign material contamination. A suitable solution to meet such stringent requirements is the "EP-5165-W" developed by Iruma River Rubber Co., Ltd. This is a special grade of white (white) EPDM (ethylene propylene rubber) that is compliant with food hygiene laws and excels in weather resistance and chemical resistance. In this article, we will thoroughly explain why EP-5165-W continues to be chosen in hygiene management settings from the perspectives of "legal compliance," "color advantages," and "basic performance," and we will introduce our solutions at Daiko Co., Ltd., which process and supply this safe material tailored to the shape of our customers' equipment, starting from just one piece. *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.

In the manufacturing environment of products that enter the human mouth, such as food, beverages, pharmaceuticals, and cosmetics, the safety of "rubber packings" and "gaskets" used in equipment is as important, if not more so, than the safety of the products themselves. If harmful substances were to leach from the rubber and contaminate the products, the trust in the company would collapse instantly. Not an ambiguous "food grade," but truly safe silicone rubber based on "solid evidence" from a public testing organization. That is the "Silicone Rubber Sheet SN-50" from Osaka Rubber Co., Ltd. In this article, we will thoroughly explain why SN-50 has gained absolute trust in the food and medical fields, based on the test report (No. 452-21-A-0055) issued by the Chemical Substance Evaluation and Research Institute (CERI), detailing its legal basis and test results. *For detailed content of the column, please refer to the related links. For more information, please download the PDF or feel free to contact us.

In the manufacturing fields of food, pharmaceuticals, and cosmetics, achieving a balance between "safety (compliance with the Food Sanitation Act)" and "durability (heat and chemical resistance)" is an eternal challenge. While silicone rubber and EPDM are safe and easy to use, they may not withstand high-temperature oils, certain chemicals, or high-pressure steam. This is where "Food Sanitation Act-compliant fluorine rubber IF-900," proudly offered by Iruma River Rubber Co., Ltd., comes into play. IF-900 is a high-grade product that maintains the inherent heat and oil resistance of fluorine rubber while complying with the Food Sanitation Act (Ministry of Health and Welfare Notification No. 370). In this article, we will provide a detailed explanation of the physical properties and resistance data of IF-900 based on the manufacturer's official catalog. We will also introduce our processing solutions at Daiko Co., Ltd. to procure this expensive material in the necessary shapes and quantities without waste. *For more detailed content of the column, please refer to the related links. For more information, feel free to download the PDF or contact us directly.*

The "sheet gasket," which is the most familiar sealing material on site, is widely used due to its convenience of being processed with scissors or cutters, such as joint sheets and fluororesin sheets. However, when it comes to its "thickness," are you not deciding it based on a vague feeling? In fact, the belief that "thicker is stronger and safer" for sheet gaskets is a significant misconception. On the contrary, it is not uncommon for overly thick selections of sheet gaskets to cause critical leakage problems precisely because they are sheet gaskets. In this article, we will thoroughly explain why "thin" is recommended for sheet gaskets, as well as the situations where "thick" is necessary, and the criteria for selection. *For detailed content of the column, please refer to the related links. For more information, feel free to download the PDF or contact us.*

"A leak occurred from a flange that was supposed to be tightened to the specified torque a few months later." "After performing a re-tightening (hot bolting), the gasket was damaged." Such troubles are not uncommon in the maintenance of plants and piping systems. The main cause cited is the physical phenomenon specific to gaskets known as "stress relaxation." This article will explain the mechanism of stress relaxation, the differences in behavior depending on the material, and appropriate management methods to maintain long-term sealing performance. *For detailed content of the column, you can view it through the related link. For more information, please download the PDF or feel free to contact us.*

Have you ever been troubled by such inexplicable minor leaks at the piping site? It may not be "interface leakage" that leaks from the gap between the gasket and the flange, but rather "permeation leakage," which leaks through the material of the gasket itself. In particular, when using "sheet gaskets" such as joint sheets, the risk of this permeation leakage is always present. The most effective countermeasure for this is to "make the gasket thinner." In this article, we will explain the often-overlooked mechanism of "permeation leakage" and the physical reasons why thick gaskets can lead to leaks. *For more detailed information, you can view the related links. For further details, please download the PDF or feel free to contact us.*

"Even after tightening, it keeps dripping from the gap between the flange and the gasket." "When I reused old piping, even though I put in a new packing, it won't stop." "There is rust and scratches on the flange surface, but there is no budget for replacement." The most frequently encountered trouble in piping maintenance is "Interface Leakage." Unlike "permeation leakage," which passes through the material of the gasket itself, this phenomenon occurs when fluid escapes through the "gap" between the gasket and the flange surface. The key to stopping interface leakage is "familiarity." In this article, we will explain why interface leakage occurs and how to approach rough flanges to stop the leakage. *For more detailed content of the column, please refer to the related link. For more information, feel free to download the PDF or contact us.

In the field of plant maintenance, issues with steam line leaks are never-ending. Many of these problems stem from a "selection mistake" where "joint sheets for general piping (water and oil)" were carelessly used in steam piping. "I thought it would be fine because the catalog said it was heat-resistant up to 150°C." This complacency can be fatal. There are clear physical reasons why only "steam-specific" materials should be used for steam piping. This article will explain the mechanism of "thermal degradation (hardening)" that occurs when the wrong gasket is used, as well as the risks of "re-tightening," which should absolutely be avoided, based on technical materials from Nichias. *For detailed content of the column, please refer to the related links. For more information, you can download the PDF or feel free to contact us.

This is an example of producing a framed irregularly shaped gasket measuring 210mm x 355mm from the special sheet gasket "Three Sheet 201S" (thickness 0.1mm) manufactured by Three Bond Co., Ltd. The Three Sheet packing is a special gasket that combines the advantages of both solid sheet gaskets and liquid gaskets. It is impregnated with a unique viscous material in long and strong fibrous materials, providing flexibility and excellent conformity to flange surfaces. The processing includes cutting the outer circumference and applying an R65 curve to the inner diameter. Using our plotter processing machine, we precisely cut the material according to the CAD data without damaging it. 【Case Overview】 ■ Material: Three Sheet 201S (0.1t) ■ Size: 210mm x 355mm ■ Processing Details: Outer circumference cut, R65 curve processing on the inner diameter *For more details, please download the PDF or feel free to contact us.