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In factories, hydraulic equipment, piping systems, and various industrial machines, "oil leaks (due to oil seal failure)" are a critical issue that can lead to serious equipment troubles, fires, and production line stoppages. To address these leaks, the key to sealing is the use of sealing components such as gaskets and packing made from "oil-resistant rubber." In this article, our company, a specialized trading firm and processing manufacturer of industrial sealing materials, will thoroughly explain the mechanism by which rubber deteriorates in oil, compare the characteristics of representative oil-resistant rubbers (such as NBR, FKM, and silicone), and provide guidance on the correct selection based on different environments. *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 regular repairs (scheduled maintenance) and unexpected maintenance of plants and factories, what troubles on-site personnel are the "limited short construction periods" and the "uncertainty of not knowing the exact dimensions until disassembly." What if the valve manufacturer has been discontinued, or if there are no drawings for overseas products? Delays in procurement directly lead to extended line stoppages. In this article, we will thoroughly explain how Daiko Co., Ltd., a specialized manufacturer of industrial sealing materials, addresses the challenges of component procurement in valve maintenance and dramatically smooths operations for the following fiscal years. *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.*

The "union joint" and its internal sealing component, the "union gasket," play a modest yet crucial role in the maintenance of piping and the installation of equipment. Have you ever faced issues on-site such as "water leaking from the union," "not knowing the size of the union packing for old equipment," or "using a special chemical that dissolves standard rubber products"? Due to its threaded structure, the union joint requires the selection of gaskets with appropriate thickness and material; otherwise, it can lead to insufficient tightening or excessive compression, resulting in damage and leaks. In this article, Daiko Co., Ltd., a manufacturer specializing in industrial sealing materials, will thoroughly explain the "union gasket dimension quick reference table," which is immediately useful on-site, the correct material selection based on fluid type, and key points for prompt arrangements to avoid halting operations. *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 the design, manufacturing, and maintenance of water treatment plants, industrial filtration equipment, or semiconductor manufacturing equipment, the selection of sealing materials (gaskets and packing) for piping connections is a crucial factor that affects the reliability of the equipment. In particular, when fastening "PVC piping (plastic flanges)" or "plastic lined flanges," which have limitations on tightening torque, standard sheet gaskets are prone to leakage due to insufficient surface pressure. Conversely, if tightened too much in an attempt to stop the leak, there is a risk that the flange itself may crack. A widely used sealing material that addresses these specific challenges of plastic flanges is the "D packing (EPDM molded packing)," which reliably stops fluids even at low surface pressures. *For more detailed information, please refer to the related links. For further details, you can download the PDF or feel free to contact us.*

In selecting sealing materials (such as resin gaskets and valve seats) for harsh environments like high-pressure gas piping and chemical lines, we often hear concerns like, "I don't really understand the difference between PTFE and PCTFE," or "I'm using PTFE fluoropolymer packing in a high-pressure environment, but it's becoming deformed and causing leaks." In facilities that handle industrial gases (such as oxygen, nitrogen, argon) or special chemicals, general-purpose rubber and plastics cannot be used. Mistakes in material selection can directly lead to equipment downtime or serious issues, so it is crucial to correctly understand the properties of engineering plastics and to use materials like valve seat materials appropriately for their intended applications. *For more details on the column, you can view it through the related links. For more information, please download the PDF or feel free to contact us.*

In industrial gas and high-pressure gas environments, such as filling lines for plant equipment and gas cylinders, do you have questions like "Which packing should be used for piping that carries ultra-low temperature liquid nitrogen?" or "What is 'Daiflon,' which is often specified for high-pressure gas valve seats?" In the industrial gas industry, including oxygen, nitrogen, and argon, various materials are used for pipe joints and internal valve components. Among them, "Daiflon (PCTFE)" is a representative resin material widely adopted in industrial gas facilities. In this article, our company, a specialized manufacturer of industrial sealing materials with extensive delivery experience in the industrial gas sector, will clearly explain the reasons why Daiflon is frequently used in the industrial gas and high-pressure gas industry. *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.*

Are you having trouble determining whether the bolt threads that fit 150LB (Class 150) or 300LB (Class 300) flanges in the maintenance of overseas plant equipment or in the construction of piping lines designed for oil refining and chemical plants are in metric standards or unified standards (inches)? Do you want to know the exact length of the stud bolts? In domestic plants, the JPI-7S-15 (Flanges for Petroleum Industry) standard, which is based on ASME B16.5, is widely used. While the basic dimensional system is based on ASME B16.5, there are also differences tailored to domestic operations, so it is necessary to confirm the actual specifications. Since these differ from the familiar JIS standards (10K/20K, etc.) in terms of outer diameter, P.C.D (the diameter of the circle connecting the centers of the bolt holes), and the number of bolts, if you do not confirm the exact specifications and arrange accordingly, it could lead to nonconformities on-site or leakage risks due to poor fastening. *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.*

Blowers, blowers, and fans operate as the "heart" of various industries, handling exhaust from industrial plants, factory air conditioning systems, and even flue gas treatment from incineration facilities and drying ovens. The "sealing materials (gaskets and packing)" used at flange and casing split surfaces (casing packing) fundamentally support the performance and safety of equipment in the manufacturing and maintenance of these devices. Blowers vary widely in their internal fluids and operating environments depending on their applications, ranging from standard sirocco fans that deliver clean air at room temperature to turbo blowers that handle high-temperature exhaust gases or combustion gases at several hundred degrees, and corrosion-resistant fans that exhaust corrosive gases. *For detailed content of the column, please refer to the related links. For more information, feel free to download the PDF or contact us.

Boilers and pressure vessels are essential energy sources in factories and plants, as well as in various process lines. While they are extremely convenient facilities, they also carry the risk of causing serious labor accidents (major incidents) that can endanger lives, such as massive explosions or the eruption of high-temperature fluids if something goes wrong. Therefore, based on Japan's Industrial Safety and Health Act, boilers and pressure vessels are strictly categorized according to their size, capacity, and pressure. From manufacturing to installation, operation, and eventual decommissioning, a very strict inspection and certification system, along with personnel qualification requirements, are mandated by law. In this article, Daiko Co., Ltd., a specialized manufacturer of industrial sealing materials, will explain the overall picture of "safety regulations for boilers and pressure vessels, statutory inspections (lifecycle regulations), and qualification requirements." *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 design and maintenance of plant piping and industrial machinery, preventing "electrolysis (dissimilar metal contact corrosion, galvanic corrosion)" that occurs at points where different metals come into contact is an extremely important technical challenge to ensure the longevity and safe operation of equipment. To block the weak current (corrosion current) generated by the potential difference between metals, it is necessary to completely electrically insulate the flange fastening parts (bolts, nuts, and seating surfaces). Conventional fluororesin (PTFE) sleeves are prone to deformation due to creep (stress relaxation) in high-temperature environments, which may require consideration of reduced tightening axial force and insulation performance. In this article, our company, a specialist manufacturer of industrial sealing materials and insulating materials, will explain the material characteristics of "mica," which is suitable for high-temperature environments, the selection criteria for specific fastening parts (insulating sleeves and mica washers), strict adherence rules during installation, and the total coordination of high-temperature insulating gaskets that should be used in conjunction. *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 longevity of plant equipment and various industrial machinery, preventing dissimilar metal contact corrosion (galvanic corrosion) that occurs at piping flanges and joints of different metals is an extremely important technical challenge. In this article, the term "electrolytic corrosion" primarily refers to this dissimilar metal contact corrosion (galvanic corrosion). It is necessary to ensure sufficient insulation resistance throughout the entire system. In the flange insulation (isolation) of this bolted connection, the core component that physically prevents contact (electrical conduction) between the bolt shaft and the inner wall of the flange is the insulated bolt sleeve (insulation bushing). In this article, our company, a specialized processing manufacturer of industrial sealing materials and insulating materials, will thoroughly compare the material characteristics of the two representative materials: "insulated mica sleeve" and "insulated PTFE sleeve." *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.