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

In civil engineering sites such as mountainous areas and construction sites, it may be necessary to use wooden boards on slopes or inclined access roads. Hyper CLT boards are civil engineering materials utilizing wood CLT, which can be laid not only on flat ground but also on sloped terrain. They can be used for temporary roads, access routes, heavy machinery entry paths, and measures against muddy conditions, creating a driving environment that takes advantage of the unique surface characteristics of wood. The 5×10 board weighs approximately 230 kg, and the 5×20 board weighs about 460 kg, making them lightweight and easy to install and remove even with small machinery, which is a notable feature for maneuverability in narrow sites. This wooden board is registered as a technology under the Ministry of Land, Infrastructure, Transport and Tourism's NETIS system as "TH-250021-A," and can also be utilized for safety measures and innovative ideas in public works.

Metal cracks are one of the concerns in equipment maintenance operations. Repairs using conventional welding methods can alter the base material around the crack due to heat, leading to residual stress and deformation, which always carries the risk of "crack recurrence" or "secondary damage." Hinode Waterworks Equipment Co., Ltd.'s "Mechanical Stitching Method" is a new technique that allows for the repair of metal cracks without applying heat. By using special bolts and reinforcement plates, the crack is physically removed without affecting the base material with heat. Repairs can be performed even in environments where open flames cannot be used. Since no heat is applied, the disassembly of equipment is minimized. For more details, please contact us or download the catalog.

● The production time for cast prototypes can be shortened! Since model making is not required, the production time for prototypes, which previously took about a month, can be significantly reduced. ● Model costs can be reduced! By directly producing sand molds from 3D data, there is no need for model production costs. If changes to the model are necessary, they can be addressed by modifying the 3D data. ● Similar products with different shapes and dimensions can be prototyped simultaneously! Different products, such as similar shapes or varying dimensions, can be molded at the same time in one molding process. This allows for the verification of multiple types in a short period.

● To determine the sealing and waterproofing of sealed products based on pressure changes, it is not necessary to conduct tests that involve spraying water on the product or immersing it in water. ● Once the product is placed in a dedicated fixture within the inspection device, waterproofing can be quantitatively confirmed through automatic measurement. ● The target product size is W 300 × D 210 × H 100 mm or smaller. ● The target products include automotive cameras, smartphones, ECUs, small motors, and other packaging containers, and are effective for any products that require confirmation of sealing, waterproofing, and airtightness. ● For product specifications and details, please contact us.

The inspection targets of the "MSX-7003 series" are relatively large electronic devices. 【Inspection Targets】 - LED - Optical devices - High-frequency devices - Power semiconductors - IR sensors - Gyro sensors - Angular velocity sensors - Electrolytic capacitors, etc. The transport system is designed based on "pallet to pallet" to accommodate various types of work. The following three processes are performed automatically by the airtight inspection device: - Helium bombarding - Gross leak test - Fine leak test For packaged products smaller than 10 mm on each side, the work is set up using pallets or trays, followed by helium bombarding ↓ Then transported to the leak test process through high-speed handling ↓ Going through a continuous process from the gross leak test to the fine leak test ↓ And finally, discharged onto a pallet through high-speed handling. It also supports inline operations (the height of the pass line is 940 mm). Please watch the YouTube video from the link below.