Diaphragm Valve Comprehensive Catalog *Includes Technical Data
Achieving high maintenance efficiency with a unit-based design! A diaphragm valve with high airtightness, zero seat leakage, and excellent corrosion and chemical resistance.
This catalog features a variety of diaphragm valves manufactured and sold by Nihon Diaphragm Valve Co., Ltd. A diaphragm valve is a type of valve that uses a flexible diaphragm made of materials such as rubber to open and close the flow path. They are broadly classified into two types: the wear-resistant type with high airtightness and the straight type with low pressure loss and minimal liquid accumulation. The catalog includes a diverse range of products, including manual operation valves, air-operated ON-OFF valves, and electric operation valves. Additionally, technical materials such as dimension and material selection tables are included at the end. [Contents] ■ Manual operation valves ■ Air-operated ON-OFF valves ■ Air-operated flow control valves ■ Electric operation valves ■ Technical materials, etc. *For more details, please refer to the PDF materials or feel free to contact us. (The English and Chinese versions of the catalog can be downloaded from the catalog page of the special website below.)
basic information
【Featured Products】 ■ Manual Operation Valves ・Wear Type Diaphragm Valve: 400 Series ・Straight Type Diaphragm Valve: 500 Series ■ Pneumatic ON-OFF Valves ・Wear Type Diaphragm Valve: PO(PC,PN)/HO(HC,HN)1400N Series ・Straight Type Diaphragm Valve: PO(PN)/HO(HN)1500N Series ■ Pneumatic Flow Control Valves ・Rolling Diaphragm Type: BO(BC)3400 Series ・Piston Type: HN3400N Series ■ Electric Operation Valves ・Wear Type Diaphragm Valve: MS(NR)4400 Series ・Straight Type Diaphragm Valve: MS(NR)4500 Series *For more details, please refer to the PDF materials or feel free to contact us. (The English and Chinese versions of the catalog can be downloaded from the catalog page of the special website below.)
Price range
Delivery Time
Applications/Examples of results
【Applications】 ■Wear-type diaphragm valves - Chemicals, environmental/water treatment, steel, shipbuilding, pharmaceuticals, food, semiconductors, power generation, etc. ■Straight-type diaphragm valves - Water purification plants, final treatment plants, etc. *For more details, please refer to the PDF materials or feel free to contact us. (Catalogs in English and Chinese can be downloaded from the catalog page of the special website below.)
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News about this product（39）
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Notice of Shipping Suspension Period Due to Interim Financial Statement Inventory Count
Thank you very much for your continued support. We would like to inform you that our company will suspend product shipping operations for inventory purposes due to the interim financial closing on the following dates. We apologize for any inconvenience this may cause and appreciate your understanding. Shipping suspension period: Tuesday, September 30, 2025.
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Notice of catalog revision for "NDV diaphragm valves" and "NDV sanitary-related valves" (FAQ collection also introduced!!)
We have started distributing the revised version of the catalog listed below. We hope it will be useful for your daily operations in selecting valves. We would be grateful if you could gain a deeper understanding of our products. ◇ NDV Diaphragm Valves: This catalog features a variety of products including manual valves, air-operated ON-OFF valves, and electric valves. Additionally, it includes technical materials such as dimension and material selection tables at the end, which will assist in valve selection. ■ Japanese version "No.D303-12" ◇ NDV Sanitary Related Valves: This is a 'comprehensive catalog' featuring sanitary specification valves suitable for manufacturing equipment in pharmaceuticals, food, and semiconductors. We introduce a wide range of applications, including the "Bio-Clean Diaphragm Valve Series," which maximizes the features of diaphragm valves, and sanitary butterfly valves for pharmaceutical containers. ■ Japanese version "No.D117-09" *If you would like to receive a catalog, you can apply through the inquiry page. Please feel free to contact us if you have any questions or concerns. We also have a FAQ section available, so please check it out in the related catalogs below.
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Notice of participation in FLOWTECH CHINA 2025 from June 4 (Wednesday) to June 6 (Friday), 2025.
Nihon Daiya Valve Co., Ltd. will be exhibiting at 'FLOWTECH CHINA 2025' to be held at the Shanghai National Exhibition and Convention Center from June 4 (Wednesday) to June 6 (Friday), 2025. This exhibition will showcase the latest technologies and products across a wide range of areas including pumps, valves, and piping equipment. Our local subsidiary, Tianjin Daiya Valve Co., Ltd., will present various valve products, including "PFA lining valves." [Main Exhibits] ■ PFA Lining Valves: We will showcase various PFA lining valves with excellent corrosion and chemical resistance! ■ Quick-Opening Handle Type: BQL400NB: Easy operation with a 90-degree rotation, offering excellent visibility and stable sealing performance! ■ Bio-Clean Diaphragm Valves: Sanitary valves with superior "gas tightness," "cleanability," and "maintainability"! ■ V-Port Valves: Valves ideal for lines handling "abrasive fluids" and "high-viscosity fluids," featuring a V-cut ball design! We warmly invite you to visit our booth when you attend the exhibition. We look forward to seeing you!
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Notice of participation in the Shenzhen International Semiconductor Technology and Application Exhibition (SEMI-e) from June 26 (Wednesday) to June 28 (Friday), 2024.
Nihon Daiya Valve Co., Ltd. will be exhibiting at the "Shenzhen International Semiconductor Technology and Application Exhibition (SEMI-e)" held at the Shenzhen International Convention and Exhibition Center from June 26 (Wednesday) to June 28 (Friday), 2024. This exhibition is a comprehensive international showcase related to manufacturing technologies, equipment, and materials in the semiconductor industry, and we will be presenting various valve products, including "PFA lining valves," from our local subsidiary, Tianjin Daiya Valve Co., Ltd. [Exhibition Details] ■ PFA Lining Valves: We will showcase various PFA lining valves with excellent corrosion and chemical resistance! ■ Quick-Opening Handle Type: BQL400NB: Easy operation with a 90-degree rotation, offering excellent visibility and stable sealing performance! ■ Bio-Clean Diaphragm Valves: Sanitary valves with superior "air-tightness," "cleanability," and "maintainability"! ■ V-Port Valves: Valves optimal for lines handling "abrasive fluids" and "high-viscosity fluids," utilizing V-cut balls! We warmly invite you to visit our booth when you attend the exhibition. We look forward to seeing you!
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Notice of Shipping Suspension Period Due to Year-End Inventory Closing
Thank you very much for your continued support. We would like to inform you that our company will suspend product shipping operations for inventory purposes due to the interim financial closing on the following date. We apologize for any inconvenience this may cause and appreciate your understanding. Shipping suspension period: Monday, March 31, 2025.
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Since its founding in 1955, our company has made customer satisfaction (CS) — that is, "providing products that satisfy our customers" — the fundamental management policy. For over 60 years, we have supplied products such as diaphragm valves, ball valves, and butterfly valves tailored to our customers' needs. By providing these products across a wide range of industrial sectors, including pharmaceuticals, chemicals, semiconductors, and steel manufacturing, as well as in public sectors such as nuclear and thermal power generation, water supply and sewage, and waste treatment facilities, we take pride in contributing to the development of economic activities and the creation and maintenance of an environmentally sustainable society. Moving forward, we will continue to respond to our customers' requests and strive to be of service to society, with all employees making every effort. 【Main Areas of Service】 We provide a wide range of valves across various sectors, from industries such as pharmaceuticals, chemicals, semiconductors, and steel manufacturing to public sectors like nuclear and thermal power generation, water supply and sewage, and waste treatment facilities. ■ ISO 9001 and 14001 Certification Obtained *For more details, please download our company brochure or contact us.