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.

The "Bulker No. GF300" contains no rubber at all, making it a joint sheet for steam piping that does not undergo thermal degradation. It can also be used at high temperatures. By utilizing a flexible resin binder, we have improved brittleness and susceptibility to damage compared to expanded graphite sheet gaskets. Please feel free to contact us when you need assistance. 【Features】 ■ No hardening degradation due to heat or aging ■ Since hardening does not occur, re-tightening is possible ■ Applicable to a wide range of fluids *For more details, please download the PDF or feel free to contact us.

This product is a metal gasket developed based on a rational design for high-temperature and high-pressure flange sealing materials. It maintains stable sealing performance over a wide range and does not easily cause leakage or damage even under harsh conditions such as thermal cycles, pressure cycles, and thermal pressure in piping systems. Please feel free to contact us when you need assistance. 【Features】 ■ Withstands high-temperature and high-pressure conditions, maintaining excellent sealing performance even when usage conditions change rapidly. ■ Low adhesion to flanges makes cleaning easy and allows for smooth gasket replacement work. * For more details, please download the PDF or feel free to contact us.

"Vulcan No. 6500" is a sheet-like gasket material made by mixing a special rubber-based binder with organic and inorganic fibers and a small amount of filler, followed by rolling and vulcanization. It does not contain asbestos fibers, making it suitable as a non-asbestos alternative to asbestos joint sheets. Please feel free to contact us when you need assistance. 【Usage Range】 ■ Water-based fluid pressure resistance: 2MPa / Maximum operating temperature 160℃ ■ Oil-based fluid pressure resistance: 2MPa / Maximum operating temperature 160℃ ■ Gas-based fluid pressure resistance: 1MPa / Maximum operating temperature 160℃ *For more details, please download the PDF or feel free to contact us.

"On the high-temperature and high-pressure steam line, the soft gasket could not withstand and leaked. In equipment that repeatedly starts and stops, the gasket deteriorates with each temperature change and leaks. During maintenance, it takes half a day to remove the gasket that has burned onto the flange." These are critical sealing issues that occur in important lines that can be considered the heart of the plant. In response to these challenges, the "spiral gasket" from Vulcan Corporation offers a solution by combining the advantages of "metal" and "non-metal." This article delves into the three significant benefits that this high-performance semi-metallic gasket brings to the field, how it solves the difficult sealing challenges you face, and provides specific guidelines for selecting the appropriate 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, please download the PDF or feel free to contact us.*

"Which is more suitable for our line, black tight or clean tight?" "Is an inner ring necessary for this flange, or not?" "How should I specify this complex shape for the heat exchanger?" The "spiral wound 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 method is extremely complex, 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 accidents. This article does not praise a specific product. Using the Valqua "spiral wound gasket" as a subject, it serves as a comprehensive guide to explain a practical thought process (selection flow) to solve the challenge of "complex gasket selection" that you face in the field. *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 a line handling strong acids and strong alkalis, the degradation and leakage of gaskets occur frequently." "With glass-lined flanges, it is impossible to apply clamping 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, the high-performance sealing material designed with the philosophy of 'the right material in the right place' is the 'fluororesin jacket gasket' from Valkar Co., Ltd. In this article, we will delve into the three significant benefits that this high-performance composite gasket brings to the field, how it can solve the challenges you face, and provide specific guidelines for selecting the right product from a wide range of options, explained thoroughly from a professional perspective. *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 a line handling highly corrosive chemicals, leaks from flanges are absolutely unacceptable. Flanges with glass lining or resin lining cannot withstand high tightening forces." This presents the most demanding sealing challenge, requiring both advanced chemical resistance and the ability to conform to delicate flange surfaces. One solution to this challenge is the "Fluororesin Jacket Gasket" series from Vulcan Corporation. In this article, we will thoroughly explain why this high-performance composite gasket is trusted in many chemical plants, covering its basic structure, the differences among the four main core materials (N, S, H, F types) that determine its performance, and the essential precautions that must be followed for safe use, all from a professional perspective. *For detailed content of the column, please refer to the related links. For more information, feel free to download the PDF or contact us directly.*

In a line handling highly corrosive chemicals, leaks from flanges are absolutely unacceptable. With flanges that are glass-lined or resin-lined, high tightening force cannot be applied. These are the most demanding sealing challenges that require both advanced chemical resistance and the ability to conform to delicate flange surfaces. One solution to this difficult problem is the 'Fluororesin Jacket Gasket' series from Vulcan Corporation. In this article, we will thoroughly explain why this high-performance composite gasket is trusted in many chemical plants, covering its basic structure, the differences among the four main core materials (N, S, H, F types) that determine its performance, and the essential precautions that must be followed for safe use, all from a professional perspective. *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.

"There is no stock of standard sheet gaskets for large-diameter equipment." "There are distortions and scratches on the flange surface, and normal gaskets cannot stop the leakage." "Due to urgent maintenance, we must restore the seal immediately." …These are unexpected or difficult sealing challenges that are hard to address with standard-sized sheet gaskets. To meet this ultimate demand, the "Valkar No.7GS66A" (code seal [soft] oval type) developed by Valkar Co., Ltd. was created with the concept of "size-free." In this article, we will thoroughly explain why No.7GS66A can be a "trump card" for "emergency response" and "flanges with significant distortion," from the secret of its marshmallow-like softness to the most important "selection rules" and "correct usage" to fully utilize its performance, all 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.

Contamination of products is something we absolutely want to avoid, but pure PTFE gaskets are prone to deformation (creep) and lack long-term reliability. Tightening management is difficult, and frequent re-tightening becomes necessary. This has been a long-standing dilemma faced by sites aiming to achieve both ultimate cleanliness and stable sealing performance. To address this challenge, the molecular structure of PTFE itself has been improved, resulting in the development of 'Valkar No. 7010-EX' (New Balfron Gasket) by Valkar Co., Ltd. In this article, we will thoroughly explain why No. 7010-EX can claim to have 'improved creep resistance,' from its structural secrets to specific data that supports its performance, as well as the correct knowledge for safe use, 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.

"A pure PTFE gasket is concerning due to significant deformation (creep) caused by heat. I want to choose a reliable gasket with balanced performance for a line handling various chemicals." ...In response to the needs of environments where both chemical resistance and mechanical stability are required, the standard model of filled fluoropolymer gaskets is "Valkar No. 7020" (Valkalon Gasket) from Valkar Co., Ltd. This article will thoroughly explain why No. 7020 is commonly chosen in many chemical lines, from its structural secrets to specific data supporting its performance, as well as the correct knowledge for safe use, from a professional perspective. *For detailed content of the column, please refer to the related links. For more information, feel free to download the PDF or contact us.

It is cumbersome to differentiate between gaskets for acidic and alkaline lines. I want to reduce the variety of stock and prevent human errors in selecting the wrong gasket. I want a single solution for all corrosive fluids." This is a significant challenge related to management costs and safety that maintenance personnel in plants handling diverse chemicals constantly face. To meet this ultimate demand, the flagship model of high-performance sheet gaskets developed under the name "universal" is the "Vulcan No. UF300" (Universal Hyper) by Vulcan Co., Ltd. In this article, we will thoroughly explain why the UF300 can be confidently declared as "capable of being used with the widest range of fluids" as the top model in the high-performance sheet series, from its structural secrets to specific data supporting its performance, and the correct knowledge for safe use, 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 a highly versatile gasket that can withstand both acidic and alkaline fluids. To avoid contamination of the product, a clean, white, high-performance sheet is necessary." ...In such a chemically demanding environment where higher levels of chemical resistance and cleanliness are required simultaneously, the high-performance sheet gasket "Vulcan No. MF300" (Bright Hyper) developed by Vulcan Co., Ltd. has been created to meet these stringent demands. This article will thoroughly explain why the MF300 is positioned as a higher model within the high-performance sheet series, focusing on its structural secrets, specific data that supports its performance, and the correct knowledge needed for safe use, 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.*

"The contamination of fluids with black foreign substances must be absolutely avoided," and "I want to prevent galvanic corrosion between dissimilar metal flanges." In the stable operation of a plant, there are many situations where such added value is required in addition to basic sealing performance. The high-performance sheet gasket "Vulcan No. SF300" (White Hyper) from Vulcan Corporation overcomes the challenges of conventional joint sheet heat resistance and combines two important properties: "cleanliness" and "insulation." This article thoroughly analyzes why SF300 is chosen in areas where cleanliness and insulation are required, comparing its performance with the standard type GF300. Furthermore, it provides a deep explanation from a professional perspective on the correct knowledge needed to safely harness its high performance. *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 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.*

"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 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.*