Our diaphragm valves have been highly evaluated for their high performance, quality, and reliability, and we have an extensive sales performance for many years, from domestic and overseas thermal power plants and nuclear-related facilities.

Applications (Power Plants)

Features

Corrosion resistance and wear resistance, and have a large number of deliveries to domestic and overseas steelworks.

Applications (Iron and Non-ferrous metal manufacturing)

Examples of applications and equipment

Features

The structure and cleanliness of diaphragm valves to prevent fluid contamination, we have earned a reputation for the stable quality and high reliability of our products and have been widely used by electronics and semiconductor equipment users.

Applications (Electronics and Semiconductor industries)

Examples of applications and equipment

Features

The diaphragm valve has excellent in airtightness and cleanability, and is suitable for preventing contamination.

Applications (Food Processing)

Features

“Bio-Clean diaphragm valve” series, with maximizes the features of the diaphragm valve with a “structure that does not contaminate fluids” and a “structure that provides excellent cleanability.“

A valve body with a structure that is optimal for countermeasures against dead space (liquid pools) and combination valves.

Applications (Pharmaceutical and Bio industry)

Examples of applications and equipment

Fermentation, culture, refining, pharmaceutical water, formulation processes, sterilization equipment, etc.

Selection example

Stainless steel body

Examples of applications and equipment

Fermentation, culture, purification, API, intermediate(for medicines) process, etc.

Selection example

Stainless steel body

Examples of applications and equipment

API, intermediate (for medicines) process, multi-plant, etc.

Selection example

Fluorocarbon resin lined body

The combination of wetted parts materials enables the application to various conditions of use, such as liquids, gases, strong acids, and alkalis.

Applications (Chemical Industry)

Examples of applications and equipment

Electrolysis plants, treated water lines and various process fluids.

Selection example

Rubber lined body

Weir type (400 type)

Straight type(500 type)

Examples of applications and equipment

Electrolysis plants, ethylene plants, fertilizer plants, melting processing facilities, strong acid lines, strong alkali lines, and various process fluids

Selection example

Fluorocarbon resin lined body

Examples of applications and equipment

Strong acid line, various process fluids

Selection example

Glass lined body, porcelain lined body

Examples of applications and equipment

Bioethanol facilities, treated water lines, saturated steam line and various process fluids

Selection example

Stainless steel body

This information is an example of usage. The combination of body and diaphragm material may differ depending on the actual fluid conditions.
Diaphragm valves have the advantage of being able to select the optimum and economical product specifications according to the fluid. Please contact our sales representatives for enquiry.

Features

Sealability, maintainability and corrosion resistance are highly evaluated by a wide range of users.

Applications (Water Treatment)

Examples of applications and equipment

Night soil treatment plant, sand filtration equipment, rapid filtration equipment, sludge treatment equipment, etc.

Selection example

Cast iron, Rubber lined body

Weir type (400 type)

Weir type (400 type)

Straight type (500 type)

Examples of applications and equipment

Coagulation equipment, chemical injection equipment, neutralization equipment, pure water equipment, etc.

Selection example

Rubber lined body

Examples of applications and equipment

Seawater treatment facilities

Selection example

Rubber lined body

Examples of applications and equipment

Sterilization chemicals line, etc.

Selection example

Fluorocarbon resin lined body

This information is an example of usage. The combination of body and diaphragm material may differ depending on the actual fluid conditions.

Diaphragm valves have the advantage of being able to select the optimum and economical product specifications according to the fluid. Please contact our sales representatives for enquiry.

Branch valves

Multi-branch valves

Example of 6 ports

Example of 5 ports

Multi-directional branching or multi-directional mixing is possible and is compact. The number of ports is available on request.

Fluorocarbon resin (ETFE) lining/clamp connection typeFluorocarbon resin (ETFE) lining is corrosion resistant to strong acids, alkalis, halogens and metal salt solutions.

Superior cost performance to special alloy-based materials.

No float or blister at the lining parts under the vacuum condition at high temperature.

Two-way valve

Three-way valve

Various PFA coats are applicable.

PFA lining

Glass lining

Porcelain lining

The lining material of PFA meets FDA and Food Sanitation Act（Japan）. Glass materials conform to the Food Sanitation Law.

Product features

Installation image

It has a structure of direct welding to the bottom of the tank, providing excellent mixing efficiency.

Product features

Product features

Fluid sampling is possible without dead space (pocket or liquid pool).

The product can be installed directly in the piping and is compact. There is no residual fluid in the valve.

In addition to sampling, it can be used in a wide range of applications, including fluid separation, merging, supplying of cleaning water and sterilization steam, and the discharge.

Valve specifications

Product features

This is a valve body that further improves effect of preventing liquid accumulation from the bio-clean diaphragm valve series.

By installing on horizontal piping, the valve shaft position is horizontal to eliminate liquid pools.

Valve specifications

• 

  Stainless steel body

• 

  PFA lined body

• Body type	Material
  Stainless steel body	SUS316L, SCS13
  Synthetic resin lining	PFA lining

Valves with sanitary specifications suitable for manufacturing facilities of such as pharmaceuticals, bioprocesses, cosmetics, food, and semiconductors.

Basic structure of valve

Basic structure of valve

Features of Bio-Clean diaphragm valves

①High airtightness and contamination prevention structure

②Flow path structure with excellent cleanability

③Good maintainability

④≪ High-quality, High-performance ≫ sanitary diaphragm

⑤Wide products lineup complied with various standards

Structure and Features of Sanitary Valves

Sanitary type butterfly valve for discharging powder and granules

This is a butterfly valve developed for discharging powder and granules for containers of pharmaceutical plants use.

The main parts are made of stainless steel and have a buffing finish on the inner and outer surfaces, which eliminates the adhesion of powder and granules and provides excellent cleanability.

Easy installation and removal in containers and piping due to lightweight design.

The clamp connection enables quick disassembly and assembly, making cleaning easier.

Sanitary type damper for discharging tablets

Damper developed for tablet discharge.

Optimum shape and structure with no sticking or remaining tablets for safe discharge.

Structure of avoiding tablets crush at opening the dumper.

Suitable for corrosion and chemical resistant applications. Highly reliable corrosion resistant valve fully lined with PFA.

Structure and features

①Excellent corrosion and chemical resistance

②High shaft sealing performance

③Highly durable casing

④Penetration resistance and non-stick properties

Applicable field

Standard Specifications

Cast iron butterfly valves(C201R type)

①Long Life with double off-center Mechanism

②High sealing performance by centripetal self-sealing

③Easy maintenance

Applicable field

Double off center mechanism make the valve long service life and available in a line of reverse pressure load. Reinforced PTFE seats applicable for a wide range of fluids is standard.

Structure and features

①Long life with double off-center Mechanism

②No flow directions, applicable for a line with a reverse pressure load.

③Reinforced PTFE seats for a wide range of applications

Applicable field

Standard Specifications

*JIS20K, ASME CL150 will also be available.

Made in Japan
Manufacturer: Nippon Daiya Valve
Model: Basic

A butterfly valve controls fluid by rotating a disc in a short cylindrical body.

①Center disc type (C500 type)

②Double eccentric (KM200 type, C200R type)

Features of butterfly valve

①Excellent operability

②Space-saving and compact design

③Superior in flow control

④Actuators are selectable by the operating conditions

⑤Compatible with a wide range of fluid conditions

Stainless steel oval hand wheel

・The hand wheel is compact, allowing installation and operation in a small area.

・The length is shorter than that of the lever handle to prevent accidental contact. In addition, since the hand wheel shape is oval, the open/close status of the valve is clear.

・Stainless steel (SCS13A) is used for the hand wheel material, and it is rust-free and durable.

For shielding method: EKTON1100 type

・We have an extensive track record in ball valves for the shield tunneling method.

・Small and robust.

・The actuator can be selected from a wide range including levers, ratchet levers, hydraulic, and pneumatic operation.

Top entry type: T100 type

・Top entry type allows ball and seat to be taken out from the upper part, enabling welded connection and excellent maintainability.

・Suitable for hazardous fluids or critical fluids where external leakage is not allowed.

Our strength is that we can respond to the needs of various customers by the custom-made production method.

PFA lining ball valve : K 159 type

・This is a ball valve with all wetted parts lined with PFA.

・Excellent corrosion resistance and heat resistance. Suitable for countermeasures against corrosive fluids and dissolution of impurities such as metal ions. It is also used for strong acidity/alkalinity fluids, high-purity chemicals, and in piping where non-sticking properties are required.

High pressure/large bore size ball valve: E(K)100S type

・High-pressure valves such as JIS30K(CL600) more over and large-bore valves above DN250 are available.

・It is widely used for general processes as well as high-pressure sludge.

2-stage open/close type: FPN3100 (05TN-12TN)

・It is possible to flow a certain amount of fluid in a stepwise operation.

・This product is used in combination with a flow meter and a dispenser on a dispense shipping line, such as when loading onto a tank truck, truck rental, or tanker.

This valve is suitable for highly abrasive fluid such as powder and/or slurry, high viscosity fluids and for passing pig etc. for cleaning inside of piping.

Y-Shaped 3-Way Ball Valves (Y300 type)

Manual valve
Y300 type

Pneumatically Operated Valve
(double-acting)
YWN1300 type

Features

①Body shape of the wide angle

②Optional mounting position

③Ball

④Primary sealing mechanism

⑤O-ring seal

⑥Stable bearing function

⑦Purge hole

Main applications

Main unit specifications

Y300 type (DN25-300)

*1:JIS B2220 *2:ASME B16.5

Seat specifications

Seat material: Reinforced PTFE seats, Semi-metal seats (SM), Metal seats (ST)

*Not compatible with 2-way ball valve (F100NB type) seats.

*Semi-metal seats and metal seats are available as options. Hardening treatment is applied to the ball surface.

Structure and Features of 3-Way Ball Valve (E300 type)

Manual valve
E300NB-L2 type

Manual valve
E300N-T4/L4 type

Manual Valve
E300N-T3/L3 type

Pneumatically Operated Valve
(double-acting)
EPN1300NB-L2 type

Electrically Operating Valve
EMS4300NB-T4 type

①Selection of 3-way ball valve

②Piping simplification and cost reduction

③Actuator selection according to application possible

Applicable field

Body specifications

L-port/2-sided seat: E300NB-L2 (DN15-200)

*1:JIS B2220 *2:ASME B16.5

T-port /L port/4-sided seat: E300NB-T4/L4 (DN15-100)

・JIS20K(CL300) is also manufactured. Please contact our sales representative for further details
*1:JIS B2220 *2:ASME B16.5

T-port /L port/3-sided seat: E300N-T3/L3 (DN125-200)

①V-cut ball

②Pocketless structure

③Seat with excellent heat resistance and wear resistance

④Stable bearing function

⑤Gland packing with excellent sealing performance

⑥Integrated body

⑦Full flow

⑧Excel in flow regulation

Features of FEX100NB

Main unit specifications

Features

Fire-safe type is a ball valve with a structure that can prevent a significant leakage of fluid when sealing parts such as seats and packings are burnt out by fire.

Stem ejection prevention mechanism: This mechanism prevents stem ejection by excessive fluid pressure.

Antistatic mechanism: Prevents static electricity generated by the friction between the ball and the seat from charging the ball seat and stem.

Actuators can be selected according to the application. Manually operated, pneumatically operated, for flow control, and electrically operated are applicable.

Body specifications

Body Material	Connection
Ductile iron Cast iron: FCD400 Stainless steel cast steel: SCS13A(CF8), SCS14A(CF8M), SCS16A(CF3M)	Flanged JIS10K, 20K(*1) CL(ASME, JPI)150, 300(*2)

Seat specifications (Features)

NTF

Our ball valve standard seat made of New-PTFE. This PTFE has heat resistance, chemical resistance, non-adhesive, low-friction, and further improved high-temperature creep ability.

Color: White

Maximum operating temperature: 240°C (varies with operating conditions)

Main applications: cleaning fluid, solvent, viscous fluid, etc.

NCF

A seat with reinforced PTFE filled with “”carbon fiber”” in PTFE. Excellent wear resistance compared to NTF.

Color: Black

Maximum operating temperature: 240°C (varies with operating conditions)

Main applications: Sludge, fluid containing sludge and slurry, powder, etc.

NGR

A seat with reinforced PTFE filled with “fiberglass” in PTFE. Wear resistance is equivalent to NCF. It is used for fluids that avoid the black color of NCF.

Color: White

Maximum operating temperature: 240°C (varies with operating conditions)

Main applications: Foods including textiles, etc.

CFM(GRM)

A seat with NCF(NGR) outside of which is reinforced with metallic rings (SUS316L press-molded product).
Even in case that the valve opening is held at an intermediate position, it prvent from damaging the seats, and the primary seats are hardly caught in the high-temperature region. It is also effective to prevent seat damages, ball deformation, etc. when abnormal pressure rise occurs.

Color: CFM black (resin part)/ GRM white (resin part)

Maximum operating temperature: 240°C (varies with operating conditions)

Main applications: Steam, sludge, fluid containing sludge and slurry, powder, etc.

CFMR(GRMR)

A seat inside of CFM(GRM) is further reinforced with metallic rings. The usage range is wider than the CFM(GRM) seat.

Color: CFMR black (resin part)/ GRMR white (resin part)

Maximum operating temperature: 240°C (varies with operating conditions)

Main applications: Steam, sludge, fluid containing sludge and slurry, powder, etc.

CFMO(GRMO)

A seat with an O-ring mounted on the back of CFM(GRM) seat. Floating ball type primary side seal is expected.

Color: CFMO black (resin part)/ GRMO white (resin part)

Applicable nominal size: DN40～200

Maximum operating temperature: 150°C (varies with operating conditions)

Major applications: Sludge, fluid containing sludge, etc.

CB

A seat for high-temperature application made by shrink-fitting a SUS316 retainer to the outside of carbon impregnated with a carbon graphite-like special metal. High rigidity allows the valve for intermediate position and flow rate adjustment.

Color: Black

Maximum operating temperature: 450°C (varies with operating conditions)

Major applications: Steam, heat transfer oil, etc.
*There exists an allowable leakage of the valve seat. Please contact our sales representative for the details.

ST

A seat with its contact surfaces with balls are filled with stellite.
The balls are made of nickel alloy sprayed on the surface to increase the hardness.
Also, it has high rigidity, so it can be used for intermediate position and flow rate adjustment.

Maximum operating temperature: 500°C (varies with operating conditions)

Major applications: high temperature fluids, slurry, powder, highly viscous fluids, etc.
*There exists an allowable leakage of the valve seat. Please contact our sales representative for the details.

Basic structure and sealing principle of ball valves

Fig. 1

Valves in which a ball rotates on a valve stem as a shaft to control the fluid.

As shown in Fig. 1, the flow path has the same shape as the piping, and there are few elements that give resistance to the fluid, so the structure has extremely low pressure loss when fully opened

Fig. 2: Floating ball type

Fig. 3: Fixed ball type

The fixed ball type has a structure in which the upper and lower portion of the ball are supported and fixed by the stem and trunnion as shown in Fig. 3.

With this structure, the fluid is closed using the spring force at the back of the seat and the pressure on the primary side applied to the back of the seat when fully closed.

Therefore, the seal is on the primary side, and it is characterized by less fluctuation of operating torque against fluctuation of flow pressure.

It is mainly used for high pressure (JIS30K, CL600 or higher) and large bore size (DN250 or higher).

Features of ball valves

①Easy operation of fully open and closed

Our strength is that we can respond to the needs of various customers by the custom-made production method.

We introduce special-purpose products and related products

Gage valve: 400G type

Valves for liquid level inspection utilizing the structure and features of a weir type diaphragm valve.

The lined body can be used for corrosive fluids.

Applicable nominal size: 20A

Rubber-lined check valve: B900 type /N900 type

A rubber-lined check valves that take advantage of our rubber-lined processing technology.

15A-80A: Ball type (for vertical piping only)

100A-150A: Swinging type

For nuclear power plants: A400 type

Diaphragm valves for nuclear power plants that require strict control and high sealing performance.

The valves have been evaluated its performance and safety at domestic nuclear power plants for years.

Bio-Clean diaphragm valve series

Valves with sanitary specifications that are suitable for manufacturing facilities such as pharmaceuticals, cosmetics, foods, and semiconductors.

For details on this product, please refer to the “Sanitary Valves” page.

Fluorocarbon resin lining

 

We offer PFA and ETFE lined valves suited to different fluid conditions and clamp connection type lining valves for pharmaceutical, food, and fine chemical industries.
For varied applications, we also provide fluorocarbon resin coatings.
For more details, please contact our sales representatives.

Rubber lining

Hard natural rubber, Soft natural rubber, Chloroprene rubber, and Butyl rubber are available according to your usage conditions.

Polyethylene lining

Lining of polyethylene resin, suitable for water treatment chemicals,etc., is available.

Glass lining

The glass lined bodies, which is suitable for strong acid fluids and strongly permeable fluids.

Porcelain lining

Ceramic lined bodies for corrosion resistance, penetration resistance, and abrasion resistance.

Features of 500 type

It has a structure in which the flow path is close to a straight line and is little pressure loss or liquid accumulation.

Suitable for fluids containing viscous fluids, fibrous fluids, slurries, sludge, suspended solids, etc.

Actuators can be selected according to the application.

Details of body specifications

Other special materials are available, please contact our sales representatives.

Details of diaphragm specifications

As with the weir type (400 type), various types of rubber diaphragms are available depending on the fluid. (*1)

Our diaphragms are subjected to various tests under severe conditions to confirm their durability and safety. It is highly reliable for external seals and valve seat seals and has been used in a wide range of industries for years.

Suitable selection are available from an extensive lineup according to your usage conditions.

Features

This is the basic type of diaphragm valves with weir in the flow path. Close contact between the diaphragm and the weir maintains airtightness and provides high valve seat sealing performance.

Many material options for main bodies and diaphragms, including rubber and fluorocarbon resin, enable choosing the most suitable selection based on fluid composition, especially when high cost performance, corrosion resistance, and chemical resistance are necessary.

You can also select actuators based on the application.

Details of body specifications

In addition to cast iron and stainless steel cast steel, we manufacture lined valve bodies that are suitable for corrosion and chemical resistance and wear resistance.

Suitable selection are available from an extensive lineup according to your usage conditions.

Other special materials are available, please contact our sales representatives.

Details of diaphragm specifications

Diaphragms come in two types: rubber and fluorocarbon resin.

We test our diaphragms under severe conditions to confirm their durability and safety.

It is highly reliable for external seals and valve seat seals and has been used in a wide range of industries for years.

Suitable selection are available from an extensive lineup according to your usage conditions

Basic structure and mechanism of diaphragm valves

Diaphragm valves are generally refer to valves with a structure that opens and closes the flow path with a flexible diaphragm such as rubber.

The basic structure of the valve consists of three units: the actuator, the diaphragm, and the body.

Features of diaphragm valves

①Excellent airtightness

The fluid passage’s streamlined design, without pockets, minimizes liquid pooling and allows for self-purification.

③Good maintainability

This is a simple structure of three parts: the actuator, the diaphragm, and the body. Easy to disassembly and assembly.

The top entry structure allows for diaphragm replacement by simply removing the body’s bolts and nuts, even with piping attached.

④Excellent corrosion and chemical resistance

The simple body shape, suitable for lining processing.

Various body linings like rubber and fluorocarbon resin, combined with a range of diaphragm materials, allow for valve customization to suit diverse fluid conditions.

It also offers superior cost performance compared to special alloy-based materials.

⑤Environmentally friendly

Since the structure is simple, the number of parts is less than that of other valve types, and there is no waste in consumables.

Striving to reduce environmental impact by using lead-free chloroprene diaphragms and environmentally friendly paints, and by improving durability and reducing air consumption of actuator.

Features

Have excellent cleanability

The main parts are made of stainless steel and have a buffing finish on the inner and outer surfaces, which eliminates the adhesion of powder and granules and provides excellent cleanability.

Easy piping installation, disassembly, and assembly

Lightweight design makes it easy to mount and remove the product from containers and pipes. In addition, the clamp method enables quick disassembly and assembly, making cleaning easier.

Specification

Features

360-degree easy-to-see indicator:

High torque with compact body:

Lightweight and compact actuator of aluminum alloy and engineering plastics.

Drip-proof performance (equivalent to IP65):

The drip-proof feature prevents rainwater from entering and condensation, making it safe to use outdoors.

Specification

Features

Excellent corrosion and chemical resistance

Specification

Features

The 90-degree operation with the lever handle enables easy opening and closing operation compared with the normal hand wheel type.
The handle position allows for easy identification of the valve’s status from afar.
Over-tightening is preventable, ensuring a longer diaphragm lifespan.
The quick handle type fits all our valves, allowing for easy operation updates.

Specification

Performance

Suitable for corrosion and chemical resistant applications!
Highly reliable corrosion resistant valve totally lined with PFA!

Features

Excellent corrosion and chemical resistance: This is a highly reliable corrosion-resistant butterfly valve with a total lining of thermally stable molten PFA.

Penetration resistance and non-adhesive: Thick lining by high-pressure melt molding makes it highly reliable against the penetration of chemicals. In addition, the adhesive liquid will not adhere.

Standard Specifications

Features

The ball valve with jacket has a double structure with a jacket on the outside of the body.

This jacket serves the purpose of heating the fluid in the body through the flow of hot water or steam, and it is sometimes employed for cooling purposes.

One can choose actuators based on the specific application. Options include manual operation, pneumatic operation, and electrical operation.

Applicable fluid