ダイコー Product Lineup

"D6000" is a gasket material primarily composed of high-quality non-asbestos fibers and a synthetic rubber binder with excellent oil resistance, combined with a small amount of filler and formed through rolling and vulcanization. It can be used as an alternative material to traditional asbestos joint sheets within its applicable range. Additionally, it has passed the official testing for the suitability standard JIS S 3200-7 for plumbing fixtures. [Features] - Excellent processability, similar to asbestos joint sheets - Superior processability allows for short delivery times - Elastic and provides good fitting at the flange area *For more details, please download the PDF or feel free to contact us.

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.

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.*

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.*

"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.*

Overview of Processing Example Product Name: TOMBO No.1995 Irregular Gasket Dimensions: 400W×600L t3 17φ×16 holes This example is an irregular gasket made for large equipment flanges. It features a special contour that combines curved outer edges and straight sections, along with evenly spaced bolt hole processing. By adopting water jet processing, it accurately reproduces complex shapes without the need for molds, achieving both hole position accuracy and outer contour precision. It ensures stable quality from prototype to mass production. Product Features (TOMBO No.1995) TOMBO No.1995 is a general-purpose joint sheet made by blending inorganic fibers and aramid fibers with oil-resistant rubber (NBR). It is suitable for fluids such as water, oil, and brine, and excels in a balance of processability, sealing performance, and flexibility. It is commonly used as gaskets for piping flanges and equipment in various factories across many fields.

Processing Case Overview Product Name: Square C-Type Gasket Dimensions: 80W × 100L Drawing Number: TD0030947B This case involves the processing of a square C-type gasket using TOMBO No.1995 (3t). The shape includes a central hole and bolt holes, requiring a balance between external dimensions and hole position accuracy. It is used as a sealing component for industrial equipment, and the square C-type specification aims to prevent positional displacement during assembly and improve work efficiency. By adopting water jet processing, we achieved a short delivery time without the need for molds, ensuring stable dimensional reproducibility and uniform cutting surface quality.

■Overview of Processing Example Product Name: Rectangular Perforated Gasket Dimensions: 1.5t 45W×145L (22φ×2・11φ×1) This processing example involves the production of a rectangular plate-shaped gasket using TOMBO No.1995. It features a design with three holes of different diameters, serving as both fastening bolt holes and fluid passage holes. It is used in piping connections for industrial machinery, where the accuracy and reproducibility of hole positions are emphasized. Water jet processing was employed to avoid excessive stress on the material, stabilizing hole diameter and position accuracy. In particular, it suppressed burrs and distortions even in small diameter hole processing, reducing misalignment during assembly.

Based on the customer's drawing, we have produced one gasket for a heat exchanger from the standard grade joint sheet "TOMBO No.1995" with a thickness of 2mm. The shape is a "2-pass" gasket for a heat exchanger, in the form of a ring with a center branch, measuring φ532mm × φ445mm. Using our water jet cutting machine, we cut it directly from CAD data with high precision. Water jet cutting is suitable for processing gaskets with complex shapes, such as those used in heat exchangers, as it cuts with a high-pressure water stream. 【Processing Features】 ■ No need for molds, resulting in low cost and short lead times ■ Direct processing from drawings ■ High-quality cutting with no thermal effects ■ Easy repeat orders with data storage *For more details, please download the PDF or feel free to 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.*

We offer gasket processing of Nichias joint sheet "TOMBO No.1995." Utilizing advanced water jet cutting machines, we respond to various customer needs with high precision, short delivery times, and low costs, from a single prototype to large diameter products. Since we process directly from CAD data, there is no need to create expensive dies. This significantly reduces initial costs such as molds. 【Features】 ■ No molds required, low cost and short delivery time from a single prototype ■ Zero heat impact, high precision and high-quality finish ■ Up to 5.5m, we can handle large diameter and oversized sizes *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.

■Overview of Processing Example Product Name: Clutch Cover Gasket Dimensions: 1.5t × φ355 × φ322 (with P350 holes) This processing example involves the production of a gasket for a clutch cover using D6000 (1.5t). In addition to the outer and inner diameters, the inclusion of P350 bolt holes required simultaneous precision in hole positioning and shape. In this application, "compliance of the joint surface" and "ease of alignment during assembly" are crucial as they directly relate to oil sealing performance. Therefore, the drawing shape was converted into processing data, and the outer circumference, inner circumference, and hole drilling were all processed together using water jet cutting. By processing without affecting the material with heat, the reproducibility of the shape and the quality of the end face are stabilized. As a result, conditions that facilitate alignment during assembly and ensure stable finishing of the sealing surface have been secured. Furthermore, the adoption of D6000 contributes to both practicality and cost advantages for oil seal applications.

■Overview of Processing Example Product Name: 3-Pass Gasket Dimensions: Outer Diameter φ990 × Inner Diameter φ960 × t3 This processing example involves the machining of a gasket with a 3-pass structure that divides the flow path. The client operates in the piping and equipment-related field. The product specifications require a configuration that includes a large-diameter ring shape along with internal partition shapes, necessitating reproducibility of the flow path shape and continuity of the seal line. The product feature is the ability to finish the outer shape, inner diameter, and internal shape as a single unit while accommodating the flow path division due to the 3-pass structure. The machining method selected was water jet cutting. This method allows for machining without thermal impact, making it easier to ensure shape reproducibility even for complex shapes, and enables machining of holes, inner diameters, and outer shapes according to the drawings. The effects of the machining include stable dimensional reproducibility of the internal shapes, ensuring assembly compatibility, and contributing to uniformity in finished quality.

■ Overview of Processing Example Product Name: Cut-out Gasket Dimensions: Outer Diameter φ172 × Inner Diameter φ142 (P157/R7U Cut-out-2) This example showcases the processing results of a non-standard ring gasket using No.6500 (3.4t). The specification includes two cut-out sections with R shapes, designed for positioning and interference avoidance. By adopting water jet processing, we achieve high precision in reproducing free curves while minimizing thermal effects. The simultaneous accuracy of the cut-out position and outer dimensions is ensured.

Overview of Processing Example Product Name: R-shaped Irregular Gasket Dimensions: 479 × 753 (Reference) Material: No.6500 0.8t This case involves the production of a gasket with an irregular outer shape that includes an R shape and a multi-hole configuration, made from No.6500 joint sheet using water jet processing. For this project, which required precision in the outer shape including curved sections and accuracy in hole positioning, stable shape reproduction was achieved through data processing.

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.

This is an example of producing a large and complex U-shaped gasket measuring 545mm x 709mm from a non-asbestos joint sheet "Valqua No. 6500" with a thickness of 3mm, based on the customer's drawing. The processing involved drilling 17 holes with a diameter of 21mm. Using our water jet cutting machine, we achieved high precision cutting directly from CAD data. Valqua No. 6500 is a non-asbestos general-purpose joint sheet made by combining organic and inorganic fibers with NBR and other materials. It demonstrates good sealing properties against general utility fluids and has a long track record in a wide range of applications, including petroleum refining, chemical plants, ships, and general piping. [Processing Features] - Proposal for cost reduction - Low cost and short delivery time without the need for a die - Direct processing from drawings - Easy repeat orders with data storage *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.