Straight type diaphragm valve: 500 type
The flow path is close to straight, with a structure that has low pressure loss and minimal liquid accumulation! It is suitable for fluids containing sludge, suspended solids, and more!
A diaphragm valve is a type of valve that has a structure that opens and closes the flow path using a flexible diaphragm (membrane) made of materials such as rubber. The "Straight Type Diaphragm Valve: 500 Series" features a flow path that is nearly linear (straight), resulting in a structure with minimal pressure loss and liquid accumulation. It is suitable for fluids containing viscous fluids, fibrous fluids, slurries, sludge, and suspended solids. ▼ Application Fields: Water treatment plants, final treatment facilities, 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
For more details, please refer to the PDF document 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.)
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Water purification plants, wastewater treatment plants, etc.
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Notice of participation in "VIETWATER 2025" from Wednesday, October 22, 2025, to Friday, October 24, 2025. {Case studies are also being introduced!!}
Nihon Diaball Valve Co., Ltd. will be exhibiting at "VIETWATER 2025," which will be held in Ho Chi Minh City, Vietnam, from October 22 (Wednesday) to October 24 (Friday), 2025. This exhibition is the largest water treatment-related exhibition in Vietnam, and we will showcase various valves suitable for water treatment equipment, including our representative "diaphragm valves." [Exhibition Content] ■ Diaphragm Valves - We will present various lining products with excellent corrosion and chemical resistance. - We will introduce valves optimal for individual processes such as purification equipment, sludge treatment equipment, and pure water systems. ■ Ball Valves - In addition to standard two-way valve types, we offer a series of ball valves suitable for a wide range of fields. - We will showcase various valve seats that can be used under special conditions, such as with abrasive fluids. We sincerely look forward to your visit.
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Thank you for visiting the "INCHEM TOKYO 2025 Exhibition" from September 17 (Wednesday) to September 19 (Friday) [Nihon Diavalve].
We exhibited at the "INCHEM TOKYO 2025 Exhibition" held at Tokyo Big Sight from September 17 (Wednesday) to September 19 (Friday). Thank you very much for visiting our booth despite your busy schedule. 【Details of Exhibits】 ■ New Product: EX-Bio Clean Diaphragm Valve ■ Renewal: Glass Lined Diaphragm Valve ■ Ball Valve Series Suitable for a Wide Range of Fields ■ Various Lined Bodies with Excellent Corrosion and Chemical Resistance ■ PFA Lined Butterfly Valve ■ Sanitary Butterfly Valve for Powder and Granule Discharge *For more details, please download the catalog or contact us. (The catalog can be downloaded from the catalog page of the special website below.) *If there were any requests or questions that we could not address at the venue, please feel free to contact us.
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Free invitation with pre-registration! Announcement of participation in the INCHEM TOKYO 2025 exhibition.
Our company will be exhibiting at "INCHEM TOKYO 2025," which will be held at Tokyo Big Sight from September 17 (Wednesday) to September 19 (Friday). This exhibition is a specialized event for the chemical and process industries, and we will showcase a variety of valve products suitable for a wide range of industrial fields, including chemicals, environmental and water treatment, and pharmaceuticals, focusing on diaphragm valves, ball valves, and butterfly valves. 【Highlights of Our Exhibition】 ◆ New product "EX-Bio Clean Diaphragm Valve" launching in July! A next-generation diaphragm valve utilizing a new sealing structure! We have further enhanced the leakage prevention performance! ◆ Renewed products responding to many requests! The "Glass-Lined Diaphragm Valve" has been renewed! ◆ In addition, we will display various valve products suitable for a wide range of industrial fields such as chemicals, environment, water treatment, and pharmaceuticals! ◆ Our company representatives will provide explanations and proposals using actual samples! We sincerely look forward to your visit! For more details, please refer to the related document "Invitation to INCHEM TOKYO 2025 (General Invitation)" below or feel free to contact us.
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Introduction to initiatives for the environment
Nihon Diaphragm Valve Co., Ltd. obtained ISO 14001 certification in 2008 with the aim of continuously reducing environmental impact and is engaged in environmental activities. In the case of diaphragm valves, the simple structure consisting of three units: the drive part, diaphragm, and body results in fewer parts compared to other valve types, eliminating waste of consumable parts. [General Initiatives] ■ ISO 14001 certification obtained ■ Promotion of paperless operations ■ Consideration for packaging materials For more details, please refer to the related PDF materials.
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A new category "Valve FAQ" has been established on the NDV special site!
We have published "General Information on NDV Products" and "Diaphragm Valve Edition" in the Valve FAQ section. You can access it from the link below, so please take a look. *For more details, please refer to the PDF document or feel free to contact us.
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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.