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  3. ハマイ 営業本部 第二営業
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ハマイ 営業本部 第二営業

EstablishmentFebruary 1, 1927
capital39500Ten thousand
number of employees314
addressTokyo/Shinagawa/7-7-7 Nishi Gotanda, SG Square 2F
phone03-3492-6655
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last updated:Jan 09, 2025
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  • Products/Services(11)
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ハマイ List of Products and Services

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Prevents contamination by impurities: Completely oil-free ball valve [Proven in pure water systems, etc.]

A completely oil-free ball valve that prevents the contamination of impurities such as grease. Proven performance in pure water systems and water treatment equipment! Large stock available for immediate delivery!

For those struggling with long lead times for oil-free products. Get high-quality oil-free ball valves right now. 【What is oil-free processing?】 In general products, lubricating oil is used inside the ball valve for smooth operation. This is a process to remove that lubricating oil. 【Purpose of oil-free processing】 It is used in clean environments where contamination by impurities and oil, like lubricating oil, is a problem. It is suitable for use in pure water systems and similar applications. 【Features of Hamai's oil-free products】 ● No residual grease due to cleaning treatment before component assembly. ● Stock available through lot production. ● Can accommodate those using in even cleaner environments (re-cleaning of finished products, work under clean room conditions, etc.) ● Available in brass and stainless steel products. ● A butterfly handle for space-saving options is also available. 【About Hamai's ball valves】 Hamai's industrial ball valves are among the industry's top high-performance ball valves, boasting a track record of mass supply (OEM) to various industrial equipment and machine tools, mainly for automotive, semiconductor manufacturing equipment, and general industry, focusing on major manufacturers. They are adopted as genuine parts by various companies, and we respond to the unique needs for ball valves with overwhelming quality and the development of unique functions.

  • Piping Equipment

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Behind the FAQ: Tips for Using It Learned from Common Questions and Failure Cases

[Data Presentation in Progress] A detailed explanation of the "why" behind the FAQs that are hidden. Clearly introducing failure cases and tips for correct operations!

We have compiled an introductory guide to ball valves themed "Behind the FAQ" for those who are handling valves for the first time or feel that the FAQ alone is difficult to understand. This document clearly explains the points of misunderstanding and the reasons for issues based on common failure cases that have actually occurred on-site, which are not covered in the FAQ. By understanding the background such as "Why are there so many questions?" and "Where are the common operational errors likely to occur?", you can lead to safer and more reliable operations. The structure is easy to read even for beginners, and it provides tips for practical use that can be grasped in a short time.

  • Piping Equipment

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【For fire prevention of oil and similar substances!】Screw-in connection anti-static ball valve

For flammable fluids such as oil piping! Complete fire prevention with static electricity prevention ball valves.

Strengthen on-site fire prevention with anti-static piping materials! Are you overlooking the threaded connections? 【Is an anti-static valve necessary?】 When using a ball valve, static electricity is generated as the fluid rubs against the metal ball valve. With low-conductivity fluids (such as oil), static electricity accumulates inside the ball. If there is no mechanism to discharge the static electricity from the ball to the outside of the valve, the accumulated static electricity can create sparks, igniting flammable fluids and leading to fires. Measures are necessary when flowing low-conductivity, flammable fluids (e.g., petroleum). 【Features of Hamai's anti-static valve】 ● Rare threaded ball valve with anti-static function ● Easy-to-operate lever handle ● Handle shape can be changed according to your request * We do not guarantee against fire troubles such as leaks of flammable fluids. Please confirm the compliance of the fluid used with applicable laws and regulations on your own. * For more details, please refer to the related links or feel free to contact us.

  • Piping Equipment

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Basic knowledge of valves that you can't ask about now【Materials being distributed】

It's tough to research everything from scratch when selecting a product. We are offering a collection of basic knowledge that helps you understand various aspects of ball valves!

Every time you need a ball valve, it can be a hassle to look it up. As a valve manufacturer, we have compiled a collection of basic knowledge. Please find the basic knowledge and selection guide at your fingertips! - Case Studies Collection [Semiconductor Manufacturing Equipment] - Case Studies Collection [Oil and Chemical Plants] - Case Studies Collection [Construction Machinery] - Selection Guide for Ball Valves - Selection Guide for Oil-Free Treatment Valves - Case Studies on Business Improvement for Custom Products - FAQs for Ball Valves (Examples of Issues During Use and Inquiries) - Examples of Improper Use of Ball Valves (Dangerous Usage Examples) - Basic Knowledge of Oil-Free Treatment - Comprehensive Catalog

  • Piping Equipment

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Safety Measures Documentation to Prevent Misoperation of Piping and Valves: Case Studies

Now that no problems have occurred, we will clearly explain the safety points that we want to review, based on case studies!

Organizing the risks of operational errors that are often overlooked in piping and valve operations based on actual cases. This is a useful document for safety checks on-site and internal sharing. <Contents of the document> - Case studies (Petrochemical plants) - FAQs about ball valves (Examples of issues during use) - Examples of improper use of ball valves (Dangerous safety measures) - Collection of safety measures for ball valves (Safety measures for different usage environments) - Comprehensive catalog

  • Piping Equipment

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Hamai Ball Valve

Overwhelming high performance to meet various needs! Specifications and design changes are possible.

Our company offers various custom manufacturing options for "ball valves." We have numerous adoption records with major industrial equipment and vehicle manufacturers. Due to our reliable quality, we have received high evaluations across various industries for many years. We can also accommodate difficult environments and conditions such as high temperatures, low temperatures, and high pressures. If you cannot find a product that meets your requirements and are using an expensive over-spec product as a substitute, please feel free to consult with us. 【Features】 ■ Short delivery time and high quality: Domestic production allows for high-quality oil-free products with a short delivery time. ■ Custom orders: Hamai's custom products are fully tailored to your specifications. ■ Difficult environment compatibility: We can handle challenging environments and conditions. *For more details, please download the PDF or feel free to contact us.

  • Parts and Materials

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Valve product lineup

Manufacturing accident prevention products for error prevention and safety measures in devices and plants!

We would like to introduce the "valves" that we handle. We offer a variety of products, including the brass valve "BBS-B77" and stainless steel valve "TSS-124" with a locking function, as well as the stainless steel valve "BSS-574" equipped with an anti-static mechanism. Hamai accommodates custom products. Please feel free to consult with us. 【Brass Valve Lineup】 ■BBS-B77 ・Diameter: 08–15A ■BBS-B51 ・Diameter: 08–25A ■FBT-09 ・Diameter: 20–32A *For more details, please download the PDF or feel free to contact us.

  • Parts and Materials

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Stainless steel ball valve with key lock function and lockout.

Ideal for lockout of semiconductor manufacturing equipment and facility piping!

Equipped with a key lock function using a padlock (sold separately). This model is oil-free and complies with the RoHS directive (10 substances). It allows for reliable locking in both fully open and fully closed states, preventing accidents caused by unintended contact with the handle or vibrations, and is effective in preventing equipment and piping failures as well as enhancing safety measures. Parts are degreased and cleaned using a hydrocarbon-based cleaning machine, and after drying, they are assembled without using any grease or oil by hand, and shipped in individual packaging. Additionally, due to the full bore equivalent specification where the inner diameter of the connecting piping is almost the same as the valve bore diameter, fluid resistance is low when fully open, and pressure loss is minimized. Moreover, there are numerous achievements in custom-made (specification changes) products based on this model.

  • Piping Equipment

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Custom-made valve

We offer custom valve manufacturing equipped with various optional features centered around ball valves.

At Hamai, we are capable of manufacturing custom-made valves that cater to various industrial machinery, equipment, and piping, centered around ball valves. We can accommodate not only simple parts replacements but also modifications to the main body shape and combinations of different standards, allowing for fully customized designs. Special specifications such as heat resistance, pressure resistance, corrosion resistance, chemical resistance, oil-free specifications, and low environmental impact can also be supported.

  • Piping materials (copper pipes, cast iron pipes)

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Full bore equivalent type stainless steel small pneumatic automatic ball valve

Space-saving and disassemblable full-bore equivalent model.

A small pneumatic automatic valve made of stainless steel, equivalent to a large flow and full bore. It has a flange connection, allowing for disassembly and cleaning of internal components such as the ball. Additionally, the aluminum actuator equipped with a rack and pinion mechanism is high-torque, lightweight, and compact, capable of rotating in 90° increments. It is ideal for piping in tight spaces and for installation in devices that require miniaturization. Furthermore, there are numerous achievements in custom-made (specification changes) products based on this model.

  • Piping Equipment

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Piping component "Ball Valve" [made of brass or stainless steel, for LP gas, etc.]

A lineup of ball valves made of brass and stainless steel, suitable for LP gas, is available!

The piping component "ball valve" includes a lineup of products such as "brass ball valves" like the BBS series, which emphasizes versatility and cost-effectiveness, and "stainless steel ball valves" like the BSS series, tailored to the needs of the chemical and food industries. Additionally, there are "LP gas ball valves," which are optimal for LP gas and gas taps, featuring stable high quality, and "pneumatic automatic ball valves" like the LAS series, which respond to labor-saving needs. 【Product Lineup】 ■ Brass Ball Valves ■ Stainless Steel Ball Valves ■ LP Gas Ball Valves ■ Custom Ball Valves ■ Pneumatic Automatic Ball Valves ■ Motorized Automatic Ball Valves, etc. *For details, please request materials or view the PDF data from the download.

  • Drainage and ventilation equipment

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