ケイヒン List of Products and Services

It adopts a diaphragm-type structure, and since there are no sliding surfaces in the main flow path, it is resistant to debris, foreign objects, and water scale, ensuring stable operation. Being a direct-acting type, it can be used from 0 differential pressure. It is an electromagnetic valve (solenoid valve) capable of handling large flow rates (Cv value: MAX 11.5).

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We manufacture products that are strong against heat cycles from negative to positive temperatures, which are rare in the country, as well as various valves (such as solenoid valves and air-operated valves) suitable for ultra-low temperatures of -196°C, various fluids, and pressures. Our company specializes in new development and customization, and we are also focusing on the development and manufacturing of OEM products, so please feel free to consult with us. Product lineup: - Solenoid valves for liquid nitrogen - Air-operated valves for low temperatures - Solenoid valves for antifreeze, etc. *We have received numerous achievements and evaluations in various industries, including testing equipment and various device manufacturers.*

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This is the high-temperature and high-pressure valve series from Keihin, featuring high specifications and a wide range of products. We offer a variety of ultra-high-pressure piston valves and solenoid valves for ultra-high pressure. 【Main Features】 ○ Temperature: Up to MAX 250℃, Pressure: A wide range available up to MAX 60MPa ○ Reliable Japanese manufacturing, including solenoid valves with the highest pressure specifications available domestically ○ Support for OEM products, new developments, and customization → We can manufacture desired products beyond the catalog lineup ○ Compatible with various fluids → We provide products tailored for applications such as water, steam, air, and oil Our company is also focused on OEM products, new developments, and customization, and we can prepare desired products beyond the catalog lineup. In such cases, we strive for speedy and accurate responses with the accompaniment of our engineers. ◆◇ Please feel free to contact us for specifications, diameters, and other inquiries beyond the downloadable materials ◇◆

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Keihin's various valves, which are responsible for fluid control in all fields, are applied in a variety of areas. We will give away three comprehensive catalogs for free, featuring not only general products but also a wide range of special products. ■Electromagnetic Valve Comprehensive Catalog - Small general-purpose electromagnetic valves - Low, medium, and high-pressure general-purpose electromagnetic valves - Electromagnetic valves for high viscosity... ■Electric Valve Comprehensive Catalog - Small electric ball valves - Spring return type electric ball valves - Electric control valves... ■Automatic Valve Comprehensive Catalog - Constant water level valves - Needle type constant flow valves - High-performance check valves... *In addition to catalog products, we have many special products available, so please feel free to contact us. *If you would like the comprehensive catalogs, please request the materials or view the PDF data from the download section.

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Have you ever been troubled by a sudden halt in valve production? For example… === Production of valves has suddenly stopped, both domestically and internationally… === The successor model lacks compatibility in specifications and dimensions, what should we do… At Keihin Co., Ltd., we manufacture valves that meet our customers' needs, regardless of temperature, material, pressure, size, or shape. Our "Special Valve Production Case Studies" includes numerous examples of special valves we have handled in the past. [Example of a production case] ■ Ultra-high pressure pneumatic operated piston valve → Special materials are used for the valve seat and needle section to enhance durability. ■ Spring return type electric ball valve for air conditioning (steam specification) → Maintenance can be performed while still connected to the piping. ■ Sack-back type pneumatic operated valve unit → Achieved larger sack-back systems, unitization, and improved maintainability. The downloadable materials only include a selection of products. For more details, please contact us.

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Titanium is a lightweight metal with excellent corrosion resistance. It is suitable for controlling acidic fluids such as ballast water, seawater, and sodium hypochlorite, and it also possesses high strength. Please feel free to contact us for inquiries regarding connections, diameters, and structures. *The photo is a reference product (check valve, non-return valve).

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Hastelloy has high corrosion resistance to strong acids and strong alkalis, and it also has excellent heat resistance, but it is difficult to process and challenging to meet the performance requirements as a check valve. Keihin worked on this production, cleared inspections by external organizations, and successfully completed a product that meets the user's demands. (Check valve, check valve, check valve, non-return valve)

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Our company offers a rare seawater-compatible constant flow valve in Japan. It can be used for various applications such as seawater desalination and ballast water control. Regardless of pressure fluctuations, it can maintain a constant flow rate on the secondary side, and since it is self-sufficient, there is no need to set up a power supply or system. The maintenance cycle is also long, so if you are considering long-term cost reduction, please feel free to consult us. In addition, our company not only handles catalog products but also offers customization, new product development, and OEM products according to customer requests. *Please feel free to consult us if you have any issues related to valves.

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We offer a wide range of "corrosion-resistant" valves that are useful for seawater desalination devices and more. Our products include the "NSS" series of constant flow valves, available in sizes from 10A to 300A, made from SUS304 and SUS316 materials, as well as the "FPC" series of constant flow valves, ideal for low flow control, available in sizes from 8A to 15A. We also provide air release valves for seawater and check valves that are compatible with sodium hypochlorite, making them useful in the chemical industry. 【Product Lineup】 ■ Constant Flow Valve "NSS" Series ■ Constant Flow Valve "FPC" Series ■ Check Valve ■ Air Release Valve, etc. *For more details, please download the catalog or contact us.

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This is a cost-effective air release valve for seawater that thoroughly pursues cost performance. By adopting our company's original ball, developed through extensive research, we have successfully created various benefits that satisfy our customers. At the same time, it can be used for a wide range of applications. 【Delivery Achievements】 - Seawater desalination systems - Fishing port facilities - Aquaculture facilities - Marine equipment - Power plants - Aquarium facilities, etc. It can also be considered for special fluids other than seawater, so please feel free to contact us.

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We undertake steam testing and combined testing (heat cycle testing) as per the customer's request using steam boilers. We can conduct tests with saturated steam up to 200°C and superheated steam up to 400°C using steam heaters. ■ Features 【Steam Testing up to 400°C】 We can perform saturated steam tests at a pressure of 1.6 MPa and a maximum temperature of 200°C, as well as superheated steam tests up to 400°C using steam heaters. 【Heat Cycle Testing】 We can also conduct heat cycle tests with automatic control for temperature changes (steam exposure, cooling with water, drying processes, etc.) based on the set parameters. 【Combined Testing】 We also accept durability tests, hot water/immersion tests, and flow measurement tests. It is possible to combine these with steam exposure or heat cycle tests. 【Test Specimen Design】 We also design and manufacture test enclosures tailored to the test specimens. For more details, please refer to the catalog or feel free to contact us.

• Testing Equipment and Devices
• Environmental Test Equipment

When using metal valves in seawater, issues related to corrosion and durability inevitably arise, leading to a frequent use of resin valves, which are vulnerable to vibrations. In response, our company has developed metal valves for seawater that can be used for extended periods: "solenoid valves, flow control valves, and air release valves," achieving significant total cost reductions compared to resin. 【Countermeasure Introduction】 ■ Solenoid Valve: Diaphragm structure that blocks fluid entry to the movable iron core. ■ Flow Control Valve: Corrosion measures including a special coating on the spring. ■ Air Release Valve: Incorporates a ball in the valve body and our unique crystallization countermeasures. In addition to these three products, we also offer a variety of valves compatible with seawater and special fluids, including check valves! We are actively engaged in new product development and have established a system to assist you when you encounter difficulties. For more details, please refer to our catalog or feel free to contact us.

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When using metal valves with seawater or chemical solutions, durability issues due to corrosion are inevitable, and it is often seen that cases use resin valves, which are weak against vibrations. Therefore, our company has successfully developed a highly durable (3 million cycles) metal "solenoid valve" that can be used for a long time even with seawater and chemical solutions.

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The Keihin "LP2 Series" is an inline, compact piston-structured air-operated valve. The ball section is inline, requiring minimal space for installation when screwing in, allowing for space-saving in machinery. It can also be mounted on the wall, contributing to flexible design. Additionally, its durability is extremely high; while a typical ball valve may leak after 10,000 to 30,000 cycles, this product lasts for 100,000 cycles, reducing the hassle of replacement. 【Features】 ■ Space-saving installation due to inline design ■ Easy piping, reducing contact with other equipment ■ Installation can be done vertically, horizontally, or diagonally ■ Piston structure significantly improves durability compared to ball structures ■ Made of stainless steel, compatible with a wide range of fluids ■ Standard equipped with a operation confirmation indicator. *For more details, please refer to the catalog or feel free to contact us.

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