Bulk Carrier Information Magazine No. 37 Summer 2019

Durable for high-frequency and high-speed opening and closing use.

Traditionally, ball valves and butterfly valves have been widely used as compressed air-operated automatic valves that can open and close quickly and have low fluid flow resistance. However, they have had issues with "durability and high-speed operation." These issues are rarely problematic under normal usage conditions, but they can become significant in the switching valves for cooling water in the hot rolling lines of steel mills, which are used for high-frequency and high-speed opening and closing. Because the valve seat is made of a dynamic seal or metal seat, repeated operations lead to wear and damage of the valve seat, making it difficult to maintain good sealing performance over long periods. The limit for the number of open and close cycles was around 100,000 to 200,000 (about 10,000 to 20,000 cycles if the internal fluid is gas). Additionally, in cases of short opening and closing times (high-speed operation), the rapid stopping can cause a water hammer phenomenon, leading to a sudden pressure rise upstream of the valve, which adversely affects the seat packing and the valve body support bearings. This can damage the seat packing and support bearings, rendering the valve inoperable. To address these issues, we began the development of a cylinder valve as an automatic operation valve. As a result, we were able to not only solve the aforementioned problems but also complete the valve with various additional features.

• valve

Due to its full-flow structure, fluid resistance is minimal! A corrosion-resistant valve with excellent heat resistance.

The "PFA Lining Ball Valve PF2 Type" is a valve manufactured by Japan Valqua, with all wetted parts lined with scientifically inert PFA resin, offering excellent corrosion resistance. PFA resin has the best thermal stability among fluoropolymers and does not undergo aging or degradation even when exposed to high temperatures of 260°C for extended periods. Additionally, due to its full-flow structure, it has minimal fluid resistance and smooth flow, resulting in extremely low pressure loss. We also offer the "PFA Lining Check Valve PSC20 Type," suitable for highly corrosive fluids that metal valves cannot withstand. 【Features】 ■ Excellent corrosion resistance ■ Does not contaminate liquids ■ Excellent heat resistance ■ Extremely low pressure loss ■ Easy maintenance *For more details, please refer to the PDF document or feel free to contact us.

• valve

Published the standard size table for piping materials with Valflon lining manufactured by Nippon Vulcanization Industry!

This catalog includes the standard dimension table for piping materials of "Vulfron Lining" manufactured by Japan Vulcan Industry Co., Ltd., handled by Goko Shoji Co., Ltd. We introduce various products such as "lining steel pipes," "bellows," and "pliable hoses," which allow for easy bending and compact piping with fewer joints. [Contents] ■ List of fluororesin properties ■ Lining steel pipes (PTTE) ■ Bellows ■ Flexible hoses ■ Pliable hoses *For more details, please refer to the PDF document or feel free to contact us.

• Piping Materials

Fukuda Co., Ltd. has been pursuing leak detection for 60 years and is committed to advancing the future of leak testing. 【 Supporting Various Leak Tests: Air Leak Test / Gas Leak Test (Hydrogen Gas, Helium Gas) 】 We develop, manufacture, and sell leak testing equipment to inspect airtightness and sealing properties. We will propose the appropriate testers and devices for each inspection target. 【 Target Industries and Examples of Inspection Targets 】 - Automotive Industry: Engines, FC components, valves and piping, various parts - Electronic Components Industry: Smartphones, keyless switches, various small sensors - Pharmaceuticals / Food / Cosmetics Industry: Bottle containers, syringes, vials, eye drop containers, pillow packaging, PTP packaging We will propose the most suitable leak testers for each industry. 【 ISO Certification 】JIS Q 9001:2015 (ISO 9001:2015)

Fukuda's new flagship model. - Masterless type (FLA-0200 series) - General type (FLA-0201 series) Two models of air leak testers. With the mastering correction function, high-precision measurements can be achieved in a short time. Please take a look at the catalog.

● This is a leak testing device for small electronic components that does not use fluorinated inert liquids (PFAS-free). ● There is no longer a need for unstable visual confirmation through liquid immersion testing. It adopts a quantitative testing method that allows for stable pressure leak testing. ● It is a tabletop leak testing device specifically for gross leaks, with accuracy equal to or greater than that of liquid immersion testing. ● The detectable range is approximately 1×10⁻² Pa·m³/s to 1×10⁻⁶ Pa·m³/s (varies depending on the target product). ● It is suitable for sealed structures ranging from a few millimeters to a maximum of 80 × 70 mm. Please feel free to contact us for more information!

Fukuda Co., Ltd., which develops, manufactures, and sells leak testing equipment to inspect airtightness and sealing performance, provides a technical document that clearly explains the methods and theories of airtight testing, titled "Technical Manual." We are offering it as a PDF file. Please take this opportunity to download and view it!

What is an Air Leak Tester? An "Air Leak Tester" is a device that pressurizes the inside (or outside) of a sealed workpiece with air and determines the presence of leaks based on pressure changes. When a master with no leaks and a workpiece with leaks are pressurized, the pressure on the workpiece side decreases, creating a pressure difference between the two. By measuring this pressure difference, the presence of leaks can be determined. Generally, differential pressure air leak testing is widely used, but Fukuda also offers products that utilize direct pressure leak testing and flow meters according to the leak rate, in addition to differential pressure leak testers. Since the air leak tester uses air as the measurement medium, it incurs no running costs and is environmentally friendly.