五幸商事 List of Products and Services

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.

This catalog includes the valve price list from Hitachi Metals, revised on June 1, 2018. We introduce the "Mareble Valve Series," as well as the "Stainless Steel Valve Series" and the "Cast Steel Valve Series." [Contents] ■ Mareble Valve Series ■ Stainless Steel Valve Series ■ Cast Steel Valve Series ■ Forged Steel Valve Series ■ Electric High Torque Series ■ Pneumatic Cylinder Series *For more details, please refer to the PDF document or feel free to contact us.

It is for a fee. Please contact us for more details.

This is a product that retrofits the internal components and cover of the strainer currently in use. Applicable models: Y type, T type (bucket compatibility is conditional) Element inner diameter: φ100 or more Existing products: No restrictions on our own or other companies' products

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.

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