ダイコー Product Lineup

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.

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

We would like to introduce our steam piping joint sheet 'TOMBO No.1155'. Thanks to our unique formulation technology, we have successfully minimized the creep at high temperatures, which is a drawback of PTFE, allowing for excellent sealing performance even under high temperatures. Since PTFE is the main material, degradation at high temperatures is minimal, and it can be re-tightened as needed, ensuring safe and reliable long-term use. 【Features】 ■ High compressive strength ■ Difficult to break when installed on flanges ■ Can be installed safely *For more details, please download the PDF or feel free to contact us.

"TOMBO No.1133" is a white high-temperature resistant sheet gasket made primarily from PTFE and alumina. Since it uses alumina, which has excellent chemical resistance, there is no need to differentiate gaskets based on the type of fluid, such as acids or alkalis. Additionally, it can withstand high temperatures and high pressures, making it suitable for use in areas where electrical insulation is required. 【Standard Sizes】 ■Thickness: t1.5, t2.0, t3.0 ■Size (mm): 1270×1270 (standard) *For more details, please download the PDF or feel free to contact us.

"TOMBO No.1120" is a non-asbestos joint sheet that can cover the practical application areas of asbestos joint sheets. It is a black sheet gasket that contains no asbestos, reinforced with aramid fibers primarily made of expanded graphite. It uses oil-resistant rubber as a binder. Please feel free to contact us when you need it. 【Features】 ■ Usable for saturated steam at 2MPa ■ Excellent heat resistance, steam resistance, and corrosion resistance ■ Resistant to scratches and highly flexible *For more details, please download the PDF or feel free to contact us.

We would like to introduce our general piping joint sheet 'TOMBO No.1995'. This is a brown non-asbestos joint sheet that contains no asbestos, made by adding inorganic fillers to inorganic fibers and aramid fibers, with oil-resistant synthetic rubber as a binder. The sealing thickness is 1.5mm, and the shape used is a ring type (FR). In cases where maintenance is difficult, vortexes and other methods may be used. 【Usage Range】 ■ Water-based fluid pressure resistance: 2MPa / Maximum operating temperature 183℃ ■ Oil-based fluid pressure resistance: 2MPa / Maximum operating temperature 183℃ ■ Gas-based fluid pressure resistance: 1MPa / Maximum operating temperature 183℃ *For more details, please download the PDF or feel free to contact us.

"Since it's a utility line, should we prioritize cost and go with the NA Vortex?" "No, since it's an important line, we should opt for the reliable GR Vortex." "Wait, this fluid is corrosive, so it has to be the Naflon Vortex, right?" The "Vortex Gasket," renowned as the "ultimate weapon" for sealing in high-temperature and high-pressure lines, boasts immense trust. However, among these, many field personnel are struggling with the appropriate differentiation of the three main models: "NA," "GR," and "Naflon (PTFE)," which are particularly in demand. This article does not unilaterally recommend specific products. Based solely on the official catalog information from Nichias Corporation, it aims to put an end to the eternal question of "Which of the three major Vortex models should we choose?" by thoroughly comparing and analyzing their performance, cost, and application ranges, providing a practical selection guide for everyone to confidently choose the "correct item" for their equipment. *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 high-temperature and high-pressure steam lines, the heat and pressure resistance of sheet gaskets has reached its limit." "In areas with significant temperature fluctuations (thermal cycles), gaskets quickly degrade and leaks occur." "We need a highly reliable sealing material that can handle everything from cryogenic liquefied gases to ultra-high temperature exhaust gases with a single structure." These are critical sealing challenges that arise in important lines, often referred to as the heart of the plant. In response to these challenges, Nichias Corporation presents the "Vortex Gasket" (spiral-shaped gasket), which combines the advantages of "metal" and "non-metal" to provide solutions. This article will delve into the three significant benefits that this semi-metal gasket brings to the field, how it can solve the difficult sealing challenges you face, and provide specific guidelines for selecting the appropriate product from a wide range of options, all explained from a professional perspective. *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.*

Under extreme conditions such as high temperature, high pressure, thermal cycles, and cryogenic environments, the "Vortex Gasket (spiral gasket)" is trusted as the last line of defense. Its high sealing performance is essential for the stable operation of plants. However, this high performance can only be safely realized by adhering to strict rules (precautions) from design to selection, installation, and maintenance. Are you aware of this? This article does not praise the performance of the Vortex Gasket. Instead, it focuses solely on the risks hidden behind its high performance and the "precautions for use" that everyone on site must absolutely know to avoid those risks. It serves as a practical safety manual. *For detailed content of the column, please refer to the related links. For more information, feel free to download the PDF or contact us.

"Which is more suitable for our steam line, GR or NA?" "Is an inner ring necessary for this flange, or not?" "How should I specify this complex shape for the heat exchanger?" The Vortex Gasket, renowned as the "last line of defense" in sealing high-temperature and high-pressure lines, boasts immense trust. However, in exchange for its high performance, the selection process is extremely complicated, causing many field personnel to struggle. Incorrect selection can lead not only to increased costs due to over-specification but, in the worst case, could result in serious leakage incidents. This article does not praise a specific product. Using Nichias Corporation's "Vortex Gasket" as a subject, it serves as a comprehensive guide to explain a practical thought process (selection flow) aimed at solving the challenge of "complex gasket selection" that you face in the field. *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 a line handling strong acids and strong alkalis, the deterioration and leakage of gaskets occur frequently." "With glass-lined flanges, it is impossible to apply sufficient tightening force, resulting in unstable seals." "Every time maintenance is performed, we struggle to peel off gaskets that have adhered to the flanges." …These are serious sealing issues that arise daily in demanding environments such as chemical plants and pharmaceutical and food factories. To fundamentally solve these challenges, a high-performance sealing material that embodies the philosophy of "the right material in the right place" in its ultimate form is Nichias Corporation's "TOMBO No.9010" (Naflon PTFE cushion gasket), commonly known as the "wrapped gasket." This article will delve into the three significant benefits that this high-performance composite gasket brings to the field, how it can resolve the challenges you face, and provide specific guidelines for selecting the optimal product from a wide range of options, explained thoroughly from a professional perspective. *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.

"I can't find the optimal gasket for the glass lining flange." "I want to achieve both high chemical resistance and flexibility that conforms to the distortion of the flange surface." "I heard that No.9010 is good, but the part numbers are too complicated, and I have no idea which one to choose." ... This is a serious issue faced by many site managers seeking high-performance sealing materials. The ultimate customized solution to this problem is Nichias Corporation's "TOMBO No.9010" (Naflon PTFE cushion gasket), commonly known as the "wrapped gasket." In this article, we will thoroughly explain the extremely complex part number system of this high-performance composite gasket, unraveling each one, and provide specific guidelines from a professional perspective to help you select the "suitable item" from countless combinations to address your challenges. *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.

"In lines handling high-concentration alkaline fluids such as caustic soda and potassium hydroxide, we want to maintain long-term stable sealing performance. However, with general PTFE gaskets, there are concerns about reliability under special conditions." This presents sealing challenges in "strong alkaline" environments within plants, which are particularly corrosive and difficult in terms of material selection. To meet these extremely specialized requirements, Nichias Corporation has developed the "TOMBO No.9007-SC" (Naflon PTFE special carbon-filled punched gasket). In this article, we will thoroughly explain why No.9007-SC is specialized for "strong alkaline fluids," from its structural secrets to specific data supporting its performance, as well as the essential usage rules that must be followed, all 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.*

"I want to select a reliable gasket for a line handling acids and alkalis." "There are concerns about long-term corrosion resistance with gaskets for utility use." To address the sealing challenges in such chemically corrosive environments, Nichias Corporation has developed a fluororesin gasket specialized for chemical resistance, the "TOMBO No.1133" (Clean Silk Clean). In this article, we will thoroughly explain why No.1133 exhibits superior chemical resistance that sets it apart from conventional gaskets, including its structural secrets, specific data supporting its performance, and the correct knowledge for safe usage, all 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.*

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.*

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.

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.

We would like to introduce a case where a gas seal material with an outer diameter of φ2270mm was produced from laminated boards made by bonding board-shaped insulation materials "TOMBO No.5625" and "TOMBO No.5615." The Fineflex BIO board is a high-temperature insulation material formed into a board shape by adding inorganic and organic binders to biodegradable fibers. It is not subject to RCF regulations and is designed with consideration for the environment and safety. Due to the size exceeding the standard dimensions of the material, it was precisely cut into a four-part shape using our water jet cutting machine. By using CAD data for cutting, the split surfaces fit perfectly together, allowing for installation without gaps. [Case Overview] ■ Material: Bonded BIO board (50t) ■ Size: Outer diameter φ2270mm, four-part processed product *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.

We would like to introduce a case study where we produced 20 pieces of insulation and vibration-damping sheets for water level gauges using the heat-resistant "TOMBO No.6750-S (Vermosal Sheet-S)." "TOMBO No.6750-S" is a non-asbestos heat-resistant sheet made primarily from inorganic minerals and formed through a papermaking process. Compared to conventional asbestos sheets, it has a thermal conductivity that is approximately 30% lower, demonstrating excellent heat retention and insulation effects. The size is 34mm × 340mm (equivalent to 9B size). Using our plotter processing machine, we cut the sheets directly from CAD data to precise dimensions without the need for a die. 【Case Overview】 ■ Material: TOMBO No.6750-S 1.5t ■ Size: 34mm × 340mm (equivalent to 9B size) ■ Quantity: 20 pieces *For more details, please download the PDF or feel free to contact us.

"I want to reduce the particles (micro-particles) in the chemical solution to the absolute minimum." "I want to shorten the piping cleaning (flushing) time and speed up the startup." "Since we use harsh chemicals, we need high durability." In the fields of semiconductor and liquid crystal manufacturing, where nano-level precision processing is required, the specifications demanded for piping tubes are becoming increasingly stringent year by year. The "TOMBO No.9003-PFA-HG Naflon PFA-HG tube" from Nichias meets these advanced requirements that cannot be achieved with standard PFA tubes. Why is it called "HG (High Grade)?" Let's unravel its overwhelming specifications. *For detailed content of the column, please refer to the related link. For more information, please download the PDF or feel free to contact us.*

We would like to introduce a case where we manufactured a gasket for a screw pump gear case using the expansion graphite joint sheet "TOMBO No. 1120" with a thickness of 0.5mm, based on the drawings provided by the customer. The size is 220mm x 384mm, and the processing details include 14 bolt holes with a diameter of 14mm and 2 main port holes with a diameter of 130mm, which are precision tasks. Using our plotter processing machine, we accurately cut the very thin and delicate material according to the CAD data without damaging it. 【Processing Features】 ■ No die required, can handle from one piece ■ Precision cutting for thin materials ■ Easy repeat orders with data storage *For more details, please download the PDF or feel free to contact us.