NDV's representative product, the diaphragm valve, is superior in "air-tightness," "maintenance," and "corrosion and chemical resistance." We can adapt to many fields because we construct valves from a vast selection of materials to meet the requirements and composition of fluids, being superior in terms of cost performance as well. Made from the wealth of experience and achievements cultivated over a long history, our products offer peace of mind with high quality and high performance.

Weir Type Diaphragm Valve: 400 series

Manually Operated Valve 400 Model	Pneumatically Operated ON/OFF Valve PO1400 Model	Pneumatically Operated Control Valve BO3400 Model	Electrically Operated Valve MS4400 Model

Feature

1) Standard diaphragm valve with a weir in the flow path.
2) With built-in diaphragm (membrane) to partition fluids, and the superior sealing structure prevents contamination to fluids.
3) A simple structure with three units: the "actuator," "diaphragm," and "body." The top entry system makes it easy to perform maintenance such as replacement of the diaphragm.
4) The most suitable materials for the body and diaphragm can be chosen to match the fluid composition, for a cost efficience, corrosion and chemically resistance.
5) Choose an actuator that meets your requirements. Applies to manually operated, pneumatically operated, flow controlling, and electrically operated types.

usage
Chemical, environment/water treatment, iron and steel, ship, semiconductor, power including nuclear power, and other sectors.

Straight Type Diaphragm Valve: 500 series

Manually Operated Valve 500 Model	Pneumatically Operated ON/OFF Valve PO1500 Model	Pneumatically Operated ON/OFF Valve HN1500 Model	Electrically Operated Valve MS4500 Model

Feature

1) A diaphragm valve where the flow path is nearly straight, with little pressure loss and deposit of fluid.
2) Suited for viscous fluids, dietary fibrous fluids, slurries, sludges, and fluids that contain floating solid matter.
3) Choose an actuator that meets your requirements. Applies to manually operated, pneumatically operated, and electrically operated types.

usage
Water purification plants, sewage treatment plants, etc.

"Lined Diaphragm Valve" with Superior Resistance to Corrosion/Chemicals

Rubber Lining	Fluorocarbon Resin Lining	Glass Lining	Porcelain Lining

Feature

1) In addition to cast iron, and cast stainless steel, the valve body is manufactured with the optimal lining for resistance to crevice corrosion, corrosive fluids, metal ion elutions, etc.
2) Choose from our extensive line-up at a reasonable price to meet your requirements.
3) Standard line-up: rubber lining (hard natural rubber, soft natural rubber, chloroprene rubber, butyl rubber)
　 　　　　　　　　　　: fluorocarbon resin lining (PFA, ETFE)
　 　　　　　　　　　　: glass lining, porcelain lining (ceramic)
[NOTES]
*Straight type diaphragm valves (500 series) are only manufactured with rubber lining (note that the valves are not manufactured with fluorocarbon resin, glass, nor porcelain).
*Customers must choose materials to match their purpose. Those considering purchases should refer to the catalogue or contact our sales division.

Choose from a wide range of diaphragm materials

For Weir Type Diaphragm Valves Rubber Diaphragm	For Weir Type Diaphragm Valves Fluorocarbon Resin Diaphragm	For Straight Type Diaphragm Valves Rubber Diaphragm

Feature

1) Diaphragms are generally classified by two categories: rubber or fluorocarbon resin.
2) Choose from our extensive line-up at a reasonable price to meet your requirements.
3) Standard line-up: rubber base (natural rubber, chloroprene rubber, butyl rubber, nitrile rubber, EPDM)
　　　　　　　　 　: fluorocarbon resin base (seat surface: NEW PTFE/cushion rubber: EPDM)
[NOTES]
*Straight type diaphragms (500 series) are only manufactured rubber one (note that the fluorocarbon resin diaphragms are not manufactured.).
*Customers must choose materials to match their purpose. Those considering purchases should refer to the catalogue or contact our sales division.

Large Bore and Other Special Purpose Diaphragm Valves

Gear Operated Valve G400 Model	Angle Valve (L-shape) 400L Model	Nuclear Power Plant Purpose A400 Model	Rubber Lined Check Valve B900 Model

Feature

Built-to-order, Our advantage is to meet the needs of many customers.
For example, manufacturing valves with a large bore specialy shaped bodies, valves developed for nuclear power plants, and rubber lined check valves with high quality of lining skill . Feel free to contact us with special requests for a certain kind of diaphragm valve or special types of fluids.