日本ダイヤバルブ List of Products and Services

■NDV "PFA Lined Butterfly Valve" This product is a highly reliable corrosion-resistant butterfly valve with a total lining of PFA. All parts that come into contact with the fluid are made of PFA, providing resistance to most chemical substances. The gland mechanism, which has self-sealing properties and a wedging effect, ensures high shaft sealing performance against thermal cycles and frequent opening and closing. 【Features】 〇 Excellent corrosion and chemical resistance 〇 High shaft sealing performance 〇 Durable casing 〇 Resistance to permeation and non-stick properties ■ This product will be exhibited at "INCHEM TOKYO 2025," held at Tokyo Big Sight from September 17 to 19. 【INCHEM TOKYO 2025 Overview】 Date: September 17 (Wed) to September 19 (Fri), 2025, 10:00 AM to 5:00 PM *Online exhibition from September 1 (Mon) to October 31 (Fri), 2025 Location: Tokyo Big Sight (East Hall 5) Booth Number: 5-E14 *For more details, please download the PDF or feel free to contact us.

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■New Product: "EX-Bio Clean Diaphragm Valve" Series This product is a next-generation diaphragm valve developed from the conventional "Bio Clean Diaphragm Valve" series for pharmaceutical and related equipment, featuring a new sealing structure. While maximizing the characteristics of diaphragm valves that have a "structure that does not contaminate fluids" and "excellent cleanability," we have revamped the sealing structure to meet user needs and further enhance product performance. 【Features】 ◇ Improved airtightness! ◇ Enhanced maintainability! ◇ Ensured compatibility! ◇ Safety performance and quality! ■ This product will be exhibited at "INCHEM TOKYO 2025," held at Tokyo Big Sight from September 17 to September 19. 【INCHEM TOKYO 2025 Event Overview】 Date: September 17 (Wed) to September 19 (Fri), 2025, 10:00 AM to 5:00 PM * Online exhibition from September 1 (Mon) to October 31 (Fri), 2025 Location: Tokyo Big Sight (East Hall 5) Booth Number: 5-E14 * For more details, please refer to the catalog or feel free to contact us.

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Starting from July 2025, we began accepting orders for the new product series "EX-Bioclean Diaphragm Valve." This product is a next-generation diaphragm valve developed from the existing "Bioclean Diaphragm Valve" series designed for pharmaceutical and related equipment, featuring a new sealing structure. While maximizing the characteristics of the diaphragm valve, such as "a structure that does not contaminate fluids" and "excellent cleanability," we have revamped the sealing structure to better meet user needs and further enhance product performance. 【Features】 ■ Improved airtightness! - New sealing structure that maintains high airtightness ■ Improved maintainability! - Enhanced workability during diaphragm assembly (shortened assembly time, elimination of tightening and alignment tasks) ■ Ensured compatibility! - Same performance in the wetted parts as conventional products - Equivalent durability and seat sealing performance to conventional products - Compatible with existing valve bodies ■ Safety performance and quality! - Can accommodate emergency tightening - Applies safety technology proven in domestic nuclear power plants *For more details, please refer to the catalog or feel free to contact us.

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The "BQL400NB model" is a rapid opening and closing type handle diaphragm valve from BioClean. While the standard handle type requires about 5 rotations for operation (in the case of DN50), the rapid opening and closing handle allows for a very simple operation of just "opening and closing by 90 degrees." The valve's open and closed status can be clearly identified from a distance based on the handle position. Additionally, it has achieved a lighter and more compact design compared to conventional products. We invite you to try the easy operation and stable sealing performance of the 90-degree rotating lever handle. 【We solve these problems!】 ■ Excessive opening and closing torque → Reduction is possible, greatly contributing to labor savings. ■ Want to check the opening and closing status from a distance → The valve's open and closed status can be clearly seen from a distance based on the handle position. ■ Damage caused by over-tightening the valve → Only the minimum necessary operation is required. This prevents damage and extends the lifespan. *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.)

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This is a corrosion-resistant valve with a total lining of glass that excels in corrosion resistance, making it suitable for use with highly permeable chemical solutions. 【Features】 ■ Excellent corrosion and permeation resistance: It can be used with strong acids such as hydrochloric acid and concentrated nitric acid, as well as highly permeable chlorine gas. It has corrosion resistance against almost all chemicals, except for some such as alkalis. ■ Wear resistance: Compared to PFA linings, which show similar corrosion resistance, it has superior wear resistance, making it suitable for use with slurry-type chemical solutions. *For more details, please refer to the PDF document or feel free to contact us.

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• Other water treatment
• Valves and fittings

The Y-shaped three-way ball valve is suitable for highly abrasive fluids such as powders and slurries, as well as for high-viscosity fluids and for passing pigs and spheres used for pipeline cleaning. This product features a wide angle of 135° in its flow path, compared to the standard 90° angle of typical three-way ball valves. The wide-angle flow path design reduces the likelihood of fluid blockage compared to a 90-degree three-way valve, and helps minimize damage to the body and ball when dealing with highly abrasive fluids. Additionally, there are two types of flanges available: straight and 22.5° angled. By combining these two types of flanges in any of three locations, various patterns can be selected. 【Features】 ■ Wide-angle body shape ■ Flexible mounting orientation ■ Ideal ball design with low pressure loss ■ Excellent sealing performance ■ Stable bearing function *For more details, please download the PDF or feel free to contact us.

• Flow Control

The "PFA Lined Butterfly Valve" is a highly reliable corrosion-resistant butterfly valve that is fully lined with PFA. All components that come into contact with the fluid are made of PFA, providing excellent corrosion resistance to most chemicals. The gland mechanism, which has self-sealing and wedging effects, offers high shaft sealing performance against thermal cycles and frequent opening and closing. Additionally, the inclusion of V-packing and coil springs enhances the reliability of the shaft sealing performance against external leakage. 【Features】 ■ Excellent corrosion and chemical resistance ■ High shaft sealing performance ■ Durable casing ■ Resistance to permeation and non-stick properties *For more details, please download the PDF or feel free to contact us.

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■What is the NDV V-Port Valve? It is a ball valve that incorporates a V-cut ball. The opening side of the hemispherical ball is cut in a V shape, which effectively cuts through fibrous materials and solids. It can accommodate abrasive fluids, high-viscosity fluids, and more. It also exhibits excellent performance in heat resistance, wear resistance, and flow regulation. 【Are you facing any of these issues?】 ☑ Malfunction due to clogging in the pocket area... ☑ Malfunction caused by solids mixed in the liquid... ☑ Severe wear on the seat due to slurry fluids... 【Features】 ● V-Cut Ball: The opening side of the ball is cut in a V shape, making it effective for cutting fibrous materials and solids! ● Pocketless Structure: The valve seat is only on the primary side, reducing troubles caused by clogging of solids in the fluid! ● Excellent Heat and Wear Resistance: Capable of sealing from vacuum to high pressure without being affected by temperature and pressure differences! ● Superior Flow Regulation Function: High rangeability and excellent flow regulation performance! 【Main Applications】 Fibrous fluids, slurries, powders, pellets, high-viscosity fluids, etc. *For more details, please refer to the catalog or feel free to contact us.

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■NDV Dead Space Countermeasure Products These are products designed with a compact structure that eliminates dead spaces (such as pockets and liquid traps) in the valve body. They can be used as "contamination countermeasures" in pharmaceuticals, food, and bioprocesses. 【Are you facing these issues?】 ☑ Fluid enters the gaps inside the valve during fluid passage or when closing the valve... ☑ There are problems with large dead legs in the piping, such as liquid traps and steam sterilization effectiveness... ☑ You want to review complex piping layouts and eliminate fluid contamination risks... 【Features】 ● Sampling Valve Type P: - Enables fluid sampling without dead space! ● Three-Way Valve Type K: - Allows switching and mixing of flow paths with no dead space using a single body! ● Tank Bottom Valve Type T: - A valve specifically for tank bottoms that achieves high stirring efficiency and eliminates residual discharge! ● Self-Drain Type F: - A valve that further enhances the effect of preventing liquid traps! ■ This product will be exhibited at the "26th Interphex Japan." *For more details, please refer to the catalog or feel free to contact us.

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■NDV Dead Space Countermeasure Products These are products designed with a valve body structure that eliminates dead space (such as pockets and liquid accumulation) and is compact. Representative examples include sampling valves for collecting fluid samples, three-way valves that allow for fluid switching and mixing with a single body, and tank bottom valves that achieve high stirring efficiency and complete discharge without residue. 【Do you have any of these concerns?】 ☑ The narrow and small drain area at the bottom of the tank is difficult to stir, creating dead space... ☑ During liquid discharge or when closing the valve, liquid gets trapped in the gaps of the valve mechanism... ☑ Large dead legs in piping increase the required piping space... 【Features】 ● Sampling Valve Type P: Enables fluid sampling without dead space! ● Three-Way Valve Type K: Allows for switching and mixing of flow paths without dead space! ● Tank Bottom Valve Type T: A dedicated valve for tank bottoms that excels in stirring efficiency without dead space! ● Self-Drain Type F: A valve that further enhances the effect of preventing liquid accumulation! ■ This product will be exhibited at the "27th Interphex Japan." *For more details, please refer to the catalog or feel free to contact us.

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This product is a valve developed for manufacturing equipment in pharmaceuticals, bioprocesses, cosmetics, food, and semiconductors. The air-operated ON-OFF valve is available in the standard type 'BPO1400NB(N)'. By adopting a wear ring on the outer circumference of the piston, the operation becomes smooth, significantly improving durability, and the use of a stopper nut prevents excessive load on the diaphragm. 【Features】 ■ Significant weight reduction and compact design ■ Major improvements in smooth operation and durability ■ Excellent cleaning-friendly exterior shape ■ Environmentally friendly paint used *For more details, please refer to the catalog (P13-14) 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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The 3-way ball valve with T/L ports and a four-sided seat can be used for switching, splitting, and mixing fluids by rotating the ball with a T or L-shaped flow path by 90 degrees. For example, by introducing this valve into a process that is currently using multiple 2-way ball valves for switching, you can rationalize piping in a cost-effective manner. Please make use of this for improving piping systems where fluid switching is necessary! <Features> - The T port allows for the selection of any combination from four switching positions by a 90-degree rotation. - L ports can also be manufactured. - Robust structure with a four-sided seat. - Selection of the drive unit according to application is possible. *For more details, please refer to the PDF document or feel free to contact us.

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The fire-safe type is a ball valve designed with a structure that prevents significant fluid leakage when sealing parts such as sheets or packing are burned away due to a fire. 【Main Features】 ■ When sealing parts are burned away, fluid leakage is suppressed by a metal-to-metal seal. ■ Stem blowout prevention mechanism. ■ Anti-static mechanism. ■ Selection of the drive unit according to application is possible (manual operation, pneumatic operation, flow control, and electric operation are applicable). *For more details, please refer to the catalog or feel free to contact us.

• Other electronic parts
• Flow Control
• Other process controls

This document summarizes frequently asked questions about butterfly valves and provides answers in a Q&A format. If you have any questions or requests regarding our products other than butterfly valves, please feel free to contact us. 【Contents (Q&A)】 ■ What are the structure and features of butterfly valves? ■ What types of butterfly valves does NDV manufacture? ■ What are the features of stainless steel high-performance butterfly valves? *For more details, please refer to the PDF document or feel free to contact us.

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The "Sanitary Butterfly Valve for Powder and Granule Discharge" has numerous achievements in the discharge of powders and granules in pharmaceutical and food plants' containers. The main components are made of stainless steel, and the inner surface is finished with #400 buff polishing, which minimizes the adhesion of powders and granules and provides excellent cleanability. 【Features】 ■ Minimal adhesion of powders and granules, with excellent cleanability ■ Easy installation and removal for containers and piping ■ Adopts a clamp method for quick assembly and disassembly, making cleaning easy *For more details, please refer to the catalog or feel free to contact us.

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The "KM200 series" is a high-performance stainless steel butterfly valve that accommodates a wide range of fluids thanks to its reinforced PTFE seat. The drive shaft center of the disc is double-eccentric, and the disc and seat remain non-contact until just before fully closed, resulting in minimal seat wear and a long lifespan. The structure allows the disc and seat to be pressed together by fluid pressure, regardless of the flow direction on either the primary or secondary side. 【Features】 - Long lifespan due to the double-eccentric mechanism - Usable in reverse pressure load lines as there is no specific flow direction - Accommodates a wide range of fluids due to the reinforced PTFE seat - Seat replacement can be easily performed by removing the set ring - Synthetic rubber and metal seats can also be selected according to usage conditions *For more details, please refer to the catalog (P5-P10) 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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The "C201R type" features a double eccentric (double off-center) design for the disk's drive axis, allowing the disk and seat to remain in non-contact until just before full closure, resulting in minimal wear on the seat and a long lifespan for this cast iron butterfly valve. The seat is designed with a centering feature on the contact surface, creating a self-sealing mechanism that generates contact pressure on the disk's sealing surface due to fluid pressure, enabling efficient sealing from vacuum to high pressure. Additionally, during maintenance, the seat can be easily replaced by simply removing the seat cover. 【Features】 ■ Long lifespan due to double off-center mechanism ■ High sealing performance with centering self-seal ■ Easy maintenance *For more details, please refer to the catalog (P11-P17) 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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This document summarizes frequently asked questions about ball valves and provides answers in a Q&A format. If you have any questions or requests regarding our products other than ball valves, please feel free to contact us. 【Contents (Q&A)】 ■ Please tell us about the structure and features of ball valves. ■ Please tell us about the connection standards that can be manufactured for ball valves. ■ Please tell us about the structure and features of V-port valves. *For more details, please refer to the PDF document or feel free to contact us.

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We would like to introduce our diaphragm valve limit switch box, the 'MDNB Series', specifically designed for air-operated drive units. The indicator of the conventional model has been changed from a rubber cap to a bright red, dedicated resin indicator, improving visibility. This is a compact product with a direct mount type that incorporates a micro switch. 【Features】 ■ Direct mount type with built-in micro switch ■ Changed the indicator from a rubber cap to a bright red, dedicated resin indicator ■ Improved visibility due to the change in cap shape *For more details, please refer to the PDF document or feel free to contact us.

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At Nippon Diaphragm Valve, we handle "clamp-connected corrosion-resistant valves" with a body made of fluororesin (ETFE) lining. These valves are suitable for countermeasures against corrosive fluids in sanitary piping, gap corrosion due to chloride ions, and metal ion elution. With the diaphragm valve's features of "air tightness" + "corrosion resistance," they can completely shut off corrosive fluids. We have many achievements not only in pharmaceutical and food plants but also in high-purity chemical lines. 【Features】 ■ Body material: SUS316L ■ Lining material: ETFE ■ Connection method: Clamp joint (ISO2852) ■ Applicable nominal diameter: 25A to 65A (1S to 2.5S) *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.)

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We are pleased to introduce our new product from Japan Diavalve. 【Features】 ■ 360-degree visible indicator Adopts a dome-shaped transparent cover for excellent visibility. You can check the valve's open and closed status from various angles. ■ Compact body with high torque A lightweight and compact drive unit made from aluminum alloy and engineering plastic. ■ Drip-proof performance (equivalent to IP65) With drip-proof performance that prevents rainwater intrusion and condensation, it is safe and secure for outdoor use. *For more details, please download the catalog or contact us. (We have English and Chinese versions of the catalog available upon request!)

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We would like to introduce a two-stage opening and closing ball valve equipped with a two-stage rotary air-operated drive unit handled by Nippon Diaball Valve Co., Ltd. By installing a sub-cylinder in our standard rotary air-operated drive unit (90-degree rotation, Scotch yoke mechanism, W piston), the valve can mechanically perform a two-step operation during opening and closing. This allows for a controlled flow of a certain amount of fluid in a staged manner, and it has a proven track record for capacity control in quantitative shipping lines and for water hammer prevention. 【Features】 ■ Installation of a sub-cylinder in our standard rotary air-operated drive unit ■ Mechanically capable of two-step operation during valve opening and closing ■ Allows for a controlled flow of a certain amount of fluid in a staged manner ■ Proven track record for capacity control in quantitative shipping lines and water hammer prevention *For more details, please refer to the catalog or feel free to contact us. (An English version is available upon request!)

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Japan Diavalve Co., Ltd. aims to be a sustainable company that balances environmental activities and economic activities amid the worsening global environmental issues. Recognizing the commitment to environmental conservation as one of the important pillars of its business activities, the company obtained ISO 14001 certification in 2008 and is working together as a whole company on environmental activities. *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.)

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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.)

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【Features】 ● The structure is directly welded to the bottom of the tank, resulting in excellent stirring efficiency. ● There are no contact parts such as gland packing, stem, seat, or gasket; the opening and closing are done solely by the diaphragm, allowing for smooth discharge of the tank contents with minimal residue. Contamination caused by valve components is extremely low, and cleaning and sterilization can be easily and reliably performed. ● The applicable nominal diameters range from DN15 to 100 (4S), making it suitable for use with small containers of about 10 liters to medium tanks of about 10,000 liters. 【Specifications (Excerpt)】 ● Main body material: SUS316L ● Applicable nominal diameter (DN): 15 to 100 ● Operation method: Manual operation and pneumatic operation methods are both applicable. *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.)

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**Features** - It can be directly installed in the piping, is compact, and has a structure that prevents fluid residue in the valve. - It can be widely used for applications such as branching, merging (mixing liquids), introducing cleaning water, and discharging sterilization steam. **Specifications (Excerpt)** - Main body material: SUS316L - Applicable nominal diameter (DN): Standard combination of main pipe and valve: 15 to 50 (other ranges available as options) - Operation method: Both manual and pneumatic operation methods are applicable. *For more details, please refer to the catalog (P.20) or feel free to contact us. (An English version is available upon request!)*

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**Features** - Fluid sampling can be done without dead space (such as in pockets or liquid pools). - It can be directly mounted in the piping, is compact, and has a structure that prevents fluid retention in the valve. - In addition to sample collection, it can be widely used for branching, merging (mixing), introducing cleaning water or sterilizing steam, and discharging. **Specifications (Excerpt)** - Main body material: SUS316L - Applicable nominal diameter (DN): Standard combinations of main pipe and valve: 15 to 50 (other ranges available as options) - Operation method: Both manual and pneumatic operation methods are applicable. *For more details, please refer to the PDF document or feel free to contact us.*

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The self-draining type is a valve body that further enhances the liquid retention prevention effect of the Bio Clean diaphragm valve series. When this valve is installed on horizontal piping, it is designed to eliminate liquid retention by positioning the valve shaft horizontally. 【Specifications (excerpt)】 ■ Stainless steel body (Applicable nominal diameter (DN): 8 to 100) ■ Lined body (Applicable nominal diameter (DN): 15 to 50) ■ The surface finish classification of the body and diaphragm specifications follow standard specifications. ■ Various drive components for manual operation valves and pneumatic ON-OFF valves can be used interchangeably. *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.)

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Features 1) This product is designed with a compact structure for the valve body, eliminating dead spaces (such as pockets and liquid traps). 2) Notable examples include a self-draining type that enhances liquid trap prevention, a sampling valve for fluid sample collection, a three-way valve that allows fluid switching and mixing with a single body, and a tank bottom valve that achieves high stirring efficiency and complete discharge without residue. 【Lineup (Excerpt)】 ■ Self-draining type ■ Sampling valve: P type ■ Three-way valve: K type ■ Tank bottom valve: T type *For more details, please refer to catalog pages 17 to 21 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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This product is an ideal valve for manufacturing equipment in pharmaceuticals, bioprocesses, cosmetics, food, and semiconductors. The air-operated ON-OFF valve is available in the stainless steel drive model 'BPO1400N type 05S to 16S'. Since painting is not required, it prevents the occurrence of foreign substances due to peeling of the coating, and a retaining ring method is used to secure the bonnet and cylinder. With minimal unevenness and compact design, along with buff polishing, it offers excellent cleanability. 【Features】 ■ All stainless steel construction with excellent corrosion resistance ■ Exterior shape with superior cleanability ■ Significant improvement in smooth operation and durability *For more details, please refer to the catalog (P15-16) or feel free to contact us. (English and Chinese versions are available upon request!)

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This product is an optimal valve for manufacturing equipment in pharmaceuticals, bioprocesses, cosmetics, food, semiconductors, and more. The handle specifications include the stainless steel handle type "B400N," the aluminum handle type "BC400" (B400NB), and optionally, the quick-open/close handle type "BQL400NB" (BQL400N). Additionally, we can accommodate requests for features such as lock nuts and opening degree indicators, so please feel free to consult us. 【Features】 ■ B400N - High cleanliness and durability of the outer surface ■ BC400 (B400NB) - Lightweight and focused on cost benefits *For more details, please refer to the catalog (P12) or the leaflet, or feel free to contact us. (English and Chinese versions are available upon request!)

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This product is the ideal valve for manufacturing equipment in pharmaceuticals, bioprocesses, cosmetics, food, and semiconductors. The valve body specifications are available in "stainless steel body" and "lined body." The diaphragm is made of New PTFE on the fluid side, with a cushion rubber of EPDM (or EPDM + a) specification. 【Stainless Steel Body Production Body List (Excerpt)】 <Stainless Steel Forged Products> ■ Main Material: SUS316L ■ Material Code Number: 14 ■ Ferrule (Nominal Diameter [DN]): 8 to 100 *For more details, please refer to the catalog (P10-11) or feel free to contact us. (English and Chinese versions are available upon request!)

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This catalog introduces bio-clean diaphragm valves suitable for manufacturing equipment in pharmaceuticals, bioprocesses, cosmetics, food, and semiconductors. It provides a wide range of information, including the features of bio-clean diaphragm valves, standard specifications, manual operation valve handle specifications, and air-operated ON-OFF valves. 【Contents (Excerpt)】 ■ Features of bio-clean diaphragm valves ■ Standard specifications ■ Manual operation valves ■ Air-operated ON-OFF valve (standard type): BPO1400NB(N) model ■ Air-operated ON-OFF valve (stainless steel drive part): BPO1400NBN model *For more details, please refer to the catalog (P8-15) 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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Introducing the "Lining Type Diaphragm Valve" with excellent resistance to corrosion and chemicals. It is utilized in a wide range of fields such as chemicals, environmental and water treatment, pharmaceuticals, and semiconductors. It can be applied to countermeasure against corrosive fluids, gap corrosion, and metal ion elution. 【Product Lineup (Example)】 "Model 430": Hard natural rubber lining on a base material of FC200 or FCD-S "Model 459": PFA lining on a base material of FCD-S or SCS13 "Model 460": ETFE lining on a base material of FCD-S "Model 450": Polyethylene lining on a base material of FC200 "Model 480": Porcelain lining on a base material of FCD-S *Sanitary specification diaphragm valves are also available. *For more details, please refer to the catalog or feel free to contact us.

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This document includes applications and examples of diaphragm valves. We present reference examples of valve specifications in an easy-to-understand table categorized by application and equipment! 【Published Applications】 ■ Water treatment facilities ■ Chemicals ■ Pharmaceuticals ■ Food ■ Electrical materials & semiconductors ■ Steel & non-ferrous metals ■ Power generation *For more details, please refer to the PDF document or feel free to contact us.

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This document summarizes frequently asked questions about diaphragm valves and provides answers in a Q&A format. If you have any questions or requests regarding our products other than diaphragm valves, please feel free to contact us. 【Contents (Q&A)】 ■ What is the history of diaphragm valves? ■ Can you explain the structure of diaphragm valves? ■ What are the characteristics of diaphragm valves? ■ How should I select the combination of the body and diaphragm? ■ What is the durability and lifespan of the diaphragm? *For more details, please refer to the PDF document or feel free to contact us.

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This document summarizes frequently asked questions about NDV products in general, specifically regarding valves, and provides answers in a Q&A format. If you have any questions or requests regarding our products, please feel free to contact us. 【Contents (Q&A)】 ■ What types of valves does NDV handle? ■ Are there any restrictions on the installation position of the valve piping? ■ Why can multiple actuators be selected for a single nominal diameter? ■ What is the NAMUR standard? *For more details, please refer to the PDF document or feel free to contact us.

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At Japan Diaball Valve, we provide reliable, safe, and high-quality after-sales service. Our employees actually visit the site to conduct inspections and repairs while observing the conditions on-site. *Please feel free to contact us, as there may be cases where on-site inspections and repairs are difficult, such as with large-diameter valves. We support our users through five sales bases across the country and partner companies. For preventive maintenance and upkeep, please consult with us. We offer free materials featuring case studies available for download in PDF format. Please take a look. 【Features】 ■ Supporting the long-term maintenance and management of user facilities ■ Providing various maintenance-related services for our products based on our unique know-how accumulated over many years and the assurance of manufacturer quality ■ Accurately executing service operations entrusted to us by users, based on over half a century of rich experience and solid technical skills.

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Our company can select and provide valves made of suitable materials and structures for various types and conditions of fluids based on extensive experimental data and rich experience, through custom production tailored to our customers' needs. To deliver products that match societal needs in response to the rapid changes of the times, we are advancing technology development and research and development through our unique system. Additionally, we conduct strict quality control based on a quality assurance system certified by ISO 9001. 【Business Content】 ■ Manufacturing and sales of valves - Diaphragm valves - Ball valves - Butterfly valves - Other types of valves *For more details, please refer to the PDF materials or feel free to contact us.

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The "BQL400NB model" is a rapid-opening and closing type handle diaphragm valve from BioClean. While the standard handle version requires about 5 turns of operation (for DN50), the rapid-opening and closing handle allows for a very simple operation of just 【opening and closing by 90 degrees】. The position of the handle makes it clear to see the valve's open and close status even from a distance. Additionally, it has achieved a lighter and more compact design compared to conventional products. Please try the easy operation and stable sealing performance of the 90-degree rotating lever handle. 【We solve the following problems!】 ■ The opening and closing torque is excessive. → It can be reduced, greatly contributing to labor savings. ■ I want to check the open and close status from a distance. → The handle position clearly shows the valve's open and close status even from afar. ■ The valve is damaged due to over-tightening. → Only the minimum necessary operation is required. This prevents damage and extends lifespan. *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.)

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The "480(04) type" is a diaphragm valve made of porcelain lining that excels in corrosion and chemical resistance. It does not experience the permeation of chemical liquids, which can be a concern under certain conditions with fluororesin lining or rubber lining. Additionally, it is suitable not only as a corrosion-resistant valve for strong acid fluids but also for highly permeable fluids such as hydrochloric acid and phosphorus trichloride. 【Features】 ■ Does not experience the permeation of chemical liquids, which can be a concern under certain conditions with fluororesin lining or rubber lining. ■ Suitable not only as a corrosion-resistant valve for strong acid fluids but also for highly permeable fluids such as hydrochloric acid and phosphorus trichloride. ■ Base material: FCD-S, Lining: Porcelain *For more details, please refer to the PDF materials or feel free to contact us. (We have English and Chinese versions of the catalog available upon request!)

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This is a stainless steel oval handle that is compact overall, allowing for installation and operation in narrow spaces. Compared to lever handles, it has a shorter length, which helps prevent accidental contact and misoperation. The handle material is stainless steel (SCS13A), which is rust-free and highly durable. 【Features】 ■ Oval shape ■ Compact overall design allows for installation and operation in narrow spaces ■ Shorter length compared to lever handles helps prevent accidental contact and misoperation ■ Like lever handles, the handle position clearly indicates the valve's open and closed state ■ Made of stainless steel (SCS13A) *For more details, please refer to the PDF document or feel free to contact us.

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This is a drain discharge valve for sanitary piping with a simple design. By forming grooves in the valve seat area, it allows for continuous drainage. Other than the grooves, the design follows the NDV standard specifications, so not only consumables like diaphragms can be used, but also standard NDV actuators. Connection methods include clamp, welding, and various flanges. The flow path surface can be electropolished. 【Features】 ■ Utilizes bio-clean diaphragm valve technology ■ Ideal for manufacturing equipment in pharmaceuticals, cosmetics, food, and semiconductors ■ Basic structure is a diaphragm valve ■ Even if foreign substances enter the valve seat area, it does not fail immediately, and maintenance is excellent ■ Simple design with a gap (groove) of φ2 or φ3 equivalent at the valve seat area to discharge the drain ■ Applicable nominal diameter: Customizable from 8A to 100A as needed *For more details, please refer to the PDF document or feel free to contact us.

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This product is a valve suitable for manufacturing equipment in pharmaceuticals, bioprocesses, cosmetics, food, and semiconductors. The diaphragm completely isolates the fluid from the drive mechanism, providing a highly airtight structure. It has a packless design that eliminates the gland packing area, which is often associated with a high risk of leakage in general valves, thus excelling in maintaining airtightness and preventing bacterial contamination. 【Features】 ■ Excellent airtightness ■ Structure that does not contaminate the fluid ■ Superior cleanability ■ Excellent maintainability ■ Customizable valve body to match applications and specifications *For more details, please refer to the sanitary valve catalog (pages 8-16) or feel free to contact us. (English and Chinese versions are available upon request!)

• valve

This document is a "comprehensive catalog" featuring sanitary specification valves suitable for manufacturing equipment in pharmaceuticals, food, semiconductors, and more. It includes the "Bio-Clean Diaphragm Valve Series," which maximizes the features of diaphragm valves, as well as sanitary butterfly valves for pharmaceutical containers. Customers can select valves tailored to their applications and the fluids they use. [Contents] ■ Bio-Clean Diaphragm Valves ■ Dead Space Countermeasure Products ■ Special Valves and Related Products ■ Sanitary Valves and Cleanroom Related Products ■ Technical Documentation *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.)

• valve