Case Study of Processing Steam Gaskets | Water Jet Processing for Center Holes and Multiple Holes
■Overview of Processing Example Product Name: T1120 Steam Gasket Dimensions: 128 square (Center hole φ76, multiple bolt holes) Material: TOMBO No.1120 Processing Method: Water Jet Cutting The outer shape is square, featuring a large diameter center hole in the middle and multiple mounting bolt holes arranged around it. Since this product is used in steam lines, dimensional accuracy to ensure stable sealing performance and positional accuracy of the center hole and bolt holes are critical requirements. This product uses T1120 material, which emphasizes steam resistance, aiming to maintain stable performance even under steam conditions. Water jet cutting was selected as the processing method. Since T1120 contains fibrous materials, it tends to exhibit variability in edge quality and dimensional accuracy when processed with cutting tools. By using the non-contact method of water jet cutting, it became possible to reproduce the shape, including the center hole and multiple holes, according to the drawings while minimizing the load on the material. As a result, this contributes to stabilizing processing accuracy and improving assembly compatibility.
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■Product Features (TOMBO No.1120) TOMBO No.1120 is a joint sheet made primarily of expanded graphite, with added aramid fibers and NBR. It excels in heat resistance, steam resistance, and corrosion resistance, and has the characteristics of being flexible and resistant to scratches. It is suitable for water, steam, oil, exhaust gases, etc., and is widely used in relatively high-temperature flanges and valves in petroleum refining, chemical plants, and power plants. ■Processing Method (Water Jet Cutting) Water jet cutting is a water pressure cutting machine that uses high-pressure water to cut materials. It processes by spraying high-pressure water. The injection nozzle can be changed according to the processing material, allowing for the production of high-quality products in a short time. Additionally, the dimensional tolerances that are typically achieved through manual processing are significantly improved, resulting in stable processing accuracy. The taper of cutting surfaces from press processing can also be improved with water jet cutting.
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■Q&A (Frequently Asked Questions) Q. Is it possible to process a center hole and multiple holes simultaneously? A. Yes, it is possible. With water jet processing, shapes including the center hole and multiple bolt holes can be processed according to the drawings. Q. Is water jet processing suitable for steam gaskets as well? A. Yes. Due to the non-contact processing, there is less load on the material, allowing for stable processing even with fiber-based materials like T1120. Q. Can you accommodate prototypes and small lots? A. Yes, we can flexibly accommodate prototypes, small lots, and custom dimensions. ■Daiko's Capability At Daiko, we handle everything from material selection consultations to shape considerations and processing method proposals for steam gaskets, including T1120. We can flexibly accommodate shapes with center holes and multiple holes, as well as prototypes, small lots, and custom specifications. If you have any issues with steam line gaskets, please feel free to consult us.
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Daiko is a manufacturer specialized in processing various industrial products, including gaskets and packing. With industry-leading processing equipment, including one of Japan's largest water jet cutting machines, and a wide range of materials such as joint sheets, rubber, resin, and metal, we meet our customers' diverse needs. Leveraging the technology and experience we have cultivated over 50 years, we provide high-quality, short-lead-time, and low-cost products to contribute to solving our customers' challenges. To respond to our customers' varied needs, Daiko's production bases are equipped with various processing facilities. Among them, the water jet cutting machines, with a total of four installed at our Osaka headquarters and Tokyo branch, boast one of the largest scales in the country. The maximum processing range is W4,000 × L5,500 mm, allowing for the high-precision manufacturing of large-diameter gaskets and packing. By maximizing material efficiency, we achieve the provision of 'high quality at low cost.'
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