ウイツエンマンジャパン List of Products and Services

◆ Battery Thermal Management - Integration of conductive and cooling functions - Reduction of thermal runaway risk due to internal chain reactions - Contact cooling at the tab section ◆ Accumulator (Pressure Storage Device) - Energy storage/release - Volume compensation - Damping of pressure pulsations - Excellent technical cleanliness - Miniaturization and lightweight design using metal bellows ◆ Battery Cooling Piping - Integrated cooling piping solution for battery packs - Stainless steel thin-walled piping (thickness 0.2-0.5mm) - Compact design (thickness over 1.5mm for resin) - Lightweight structure - Excellent heat resistance - Fire resistance up to 900°C ◆ Products for Transporting Fuel Cells, H2, CO2, Cooling Water, and Other Media - High safety assurance: Maximum pressure 20MPa, meets burst test over 50MPa - Sealing performance with metal seals - Excellent design flexibility - Selection of stainless materials resistant to hydrogen embrittlement

• hose
• Engine parts
• Piping Materials

We provide various stainless steel piping products for next-generation vehicles developed using advanced thin plate processing technology. We can flexibly accommodate everything from single-item production to mass production, contributing to weight reduction and functional enhancement. 【Product Lineup】 < Battery Housing > 　■ For temperature management of battery cells and cooling of tabs 　■ Accurately limits the temperature in areas where heat is generated 　■ Lightweight with customizable flow path design < Pipes for Hydrogen Fuel Vehicles > 　■ Suitable for hydrogen flow paths at medium to low pressure 　■ Conducted burst pressure tests up to 50MPa 　■ Performed leak tests on all units using helium gas < Battery Gas Discharge Pipes > 　■ Compatible with batteries from low to high voltage 　■ Capable of handling high-temperature gases around 700℃ 　■ High safety airtight structure *For more details, please refer to the materials. Feel free to contact us with any inquiries.

• Engine parts

We offer flexible hoses that excel in corrosion resistance, airtightness, pressure resistance, and temperature resistance (both high and low temperatures). In addition to transportation applications for various media (such as CO2, H2, exhaust gases, etc.), we also handle VDE-certified products that achieve high robustness and flexibility as protective hoses for electrical components. *For more details, please feel free to contact us.*

• hose

Generally installed between the engine and the exhaust aftertreatment device, it absorbs vibrations and displacements generated within the exhaust system, engine vibrations, and thermal expansion, while also meeting the high durability required particularly in construction and agricultural machinery. It is also used for the purpose of correcting assembly tolerances. - Proposing various designs of flexible components according to application - Twin bellows composed of bellows and interlock liners - Appropriate material selection to achieve excellent corrosion resistance - Compatible with a wide range of connection shapes and diameters *For more details, please feel free to contact us.

• Engine parts

It absorbs engine vibrations, thermal expansion, and assembly tolerances that occur within systems where airtightness is primarily required, and it also meets the high durability demanded in construction and agricultural machinery. - EGR pipes (low pressure/high pressure) - Low pressure EGR pipe with filter - Flexible thermal expansion absorption around the manifold - Oil and water circulation pipes *For more details, please feel free to contact us.

• Engine parts

We are introducing products that utilize our strength in high precision sheet metal processing technology, primarily for exhaust systems that require airtightness, as well as for correcting and absorbing vibrations, thermal expansion, and assembly errors around engines. Additionally, by applying these technologies, we are proposing solutions for the electrification, thermal management, media transport (hydrogen and CO2), and cable protection of next-generation construction and agricultural machinery. *For more details, please feel free to contact us.

• Engine parts

This is a pipe used in the EGR system. By incorporating a flexible bellows, it absorbs engine vibrations, thermal expansion, and assembly tolerances, contributing to the durability of the system. Additionally, by integrating a filter, it is also possible to reduce pollutants in the exhaust gases. - Compatible with low pressure/high pressure - Low pressure EGR pipe with filter - Various designs proposed according to application - Appropriate material selection to achieve excellent heat resistance/corrosion resistance - Compatible with a wide range of connection shapes and pipe diameters *Please feel free to contact us for more details.

• Other Auto Parts

This is a product that combines straight pipes and elbow pipes with bellows. By appropriately combining these components, it absorbs engine vibrations, thermal expansion, and assembly tolerances that occur within the system, contributing to the durability of the exhaust system. It can achieve the strict airtightness and heat resistance required for exhaust systems, and by adding insulation materials, it is possible to minimize the decrease in exhaust gas temperature. - Proposing various designs according to application - Appropriate material selection to achieve excellent heat resistance and corrosion resistance - Compatible with a wide range of connection shapes and pipe diameters *Please feel free to contact us for more details.

• Other Auto Parts

We propose a flexible pipe assembly that meets high technical and shape requirements in specifications with limited installation space, absorbing vibrations, thermal expansion, and assembly errors. - Various designs tailored to specific applications - Appropriate material selection to achieve excellent temperature resistance (high and low temperatures) and corrosion resistance - Compatibility with a wide range of connection shapes and pipe diameters - Helium leak testing conducted *Please feel free to contact us for more details.

• Other Auto Parts

This is piping and flexible hoses for supplying, recovering, and recirculating hydrogen. It is capable of achieving strict airtightness and temperature resistance (both high and low temperatures). - Piping and flexible hoses for operating pressures up to 2MPa - Passed burst tests up to a maximum of 50MPa to ensure safety - Helium leak tests conducted - Various welding certification documents can be issued *For more details, please feel free to contact us.

• Other Auto Parts

It is a pipe for supplying, recovering, and recirculating media such as oil and coolant. It is capable of achieving strict airtightness and temperature resistance (both high and low temperatures). By incorporating a flexible bellows, it absorbs engine vibrations, thermal expansion, and assembly tolerances that occur within the system, contributing to the durability of the piping system. - Proposing various designs according to application - Appropriate material selection to achieve excellent temperature resistance (high and low) and corrosion resistance - Compatible with a wide range of connection shapes and pipe diameters *Please feel free to contact us for more details.

• Vehicle body parts

Starting with basic design and initial analysis, through operational load verification and life testing, the engineers at Witzenmann provide the experience and know-how necessary to carry out projects economically and efficiently, from prototype to mass production, thanks to their extensive experience and expertise. *For more details, please feel free to contact us.*

• Circuit board design and manufacturing

It is installed in the exhaust after-treatment device and absorbs displacements and thermal expansion that occur within the device. It is also used to correct assembly tolerances. - Proposing various designs of flexible components according to application - Appropriate material selection to achieve excellent corrosion resistance - Compatible with a wide range of connection shapes and diameters *For more details, please feel free to contact us.

• Automotive Connectors

Generally installed between the engine and the exhaust aftertreatment device, it absorbs vibrations and displacements generated within the exhaust system, engine vibrations, and thermal expansion, while also meeting the high durability required especially in commercial vehicles. It is also used to correct assembly tolerances. - Proposing various designs of flexible components according to application - Twin bellows consisting of bellows and interlock liners - Appropriate material selection to achieve excellent corrosion resistance - Accommodating a wide range of connection shapes and diameters *For more details, please feel free to contact us.

• Automotive Connectors

It absorbs engine vibrations, thermal expansion, and assembly tolerances that occur within exhaust systems where airtightness is primarily required, and it also meets the high durability demanded particularly in commercial vehicles. - EGR pipes (low pressure/high pressure) - Low pressure EGR pipe with filter - Flexible joints for absorbing thermal expansion around the manifold - Flexible joints for blocking solid propagation noise - Oil and water circulation pipes *Please feel free to contact us for more details.

• Engine parts

We introduce products for commercial vehicles that utilize the high thin plate processing technology, which is a strength of Witsuenman, mainly for exhaust systems that require airtightness and for absorbing corrections of vibrations, thermal expansion, and assembly errors around the engine. Our extensive experience and cutting-edge expertise and know-how allow us to provide optimal solutions. *Please feel free to contact us for more details.

• Engine parts

Products for exhaust systems of small to large trucks, buses, construction machinery, forklifts, etc. - Supports torsional input - Meets certain airtightness requirements *For more details, please feel free to contact us.

• Automotive Connectors

This is a flexible component installed to prevent the solid propagation of high-frequency vibrations generated by turbochargers and similar devices. It is mainly installed immediately after the turbocharger and consists of a short, compact bellows. - Adjustable damping range with multi-layer bellows - Inner tube structure for rectification and heat shielding - Compatible with a wide range of connection shapes and diameters - Wire mesh ring for enhanced damping of higher frequency vibrations (optional) *For more details, please feel free to contact us.

• Automotive Connectors

It is used to absorb vibrations and displacements generated within the exhaust system, engine vibrations, and thermal expansion. It can be installed in limited spaces compared to flexible (long) options. - Proposing various designs of flexible components according to application - Appropriate material selection to achieve excellent corrosion resistance - Proposals not only for circular shapes but also for oval shapes to accommodate limited installation conditions - Proposing optimal interlock liner shapes - Supporting a wide range of connection shapes and connection diameters *Please feel free to contact us for more details.

• Automotive Connectors

This is a flex that absorbs vibrations and displacements generated within the exhaust system, engine vibrations, and thermal expansion, blocking transmission to related other systems. It is installed around the front pipe near the engine, contributing to improved system durability and a comfortable ride. - Proposing various designs of flex according to application - Appropriate material selection to achieve excellent corrosion resistance - Capable of proposing not only circular shapes but also oval shapes to accommodate limited installation conditions - Proposing optimal interlock liner shapes - Supporting a wide range of connection shapes and connection diameters *Please feel free to contact us for more details.

• Automotive Connectors

The Witz Engineering Group, leveraging its unique technologies and know-how cultivated not only in the automotive industry but also across various sectors, will continue to develop innovative and groundbreaking products such as piping, batteries, and thermal management solutions for motors aimed at next-generation vehicles. By providing environmentally conscious products, we support the realization of a sustainable world. *For more details, please feel free to contact us.*

• Automotive Connectors

We offer corrugated hoses that excel in corrosion resistance, airtightness, pressure resistance, and temperature resistance (both high and low temperatures). In addition to transportation applications for various media (such as CO2, H2, exhaust gases, etc.), we also handle VDE-certified products that achieve high robustness and flexibility as protective hoses for electrical components. *For more details, please feel free to contact us.*

• hose

It absorbs engine vibrations, thermal expansion, and assembly tolerances that occur within the system, contributing to improved durability and a comfortable ride. - EGR pipe (low pressure/high pressure) - Low pressure EGR pipe with filter - Pipes around the manifold - Flexible for solid transmission sound insulation - Oil and water circulation pipes - Bellows seal for piezo injection - Bellows seal for high pressure fuel pump *Please feel free to contact us for more details.

• Engine parts

This is a flexible component that absorbs vibrations and displacements generated within the exhaust system, engine vibrations, and thermal expansion, while blocking transmission to related other systems. It is installed around the front pipe near the engine, contributing to improved system durability and a comfortable ride. - Appropriate material selection to achieve excellent corrosion resistance - Proposals available not only in circular shapes but also in oval shapes to accommodate limited installation conditions - Suggestions for optimal interlock liner shapes *For more details, please feel free to contact us.*

• Ventilation and Exhaust

We are introducing products that utilize our strength in high thin plate processing technology, primarily for exhaust systems and engine peripheral systems where airtightness is required, to correct and absorb vibrations, thermal expansion, and assembly errors. Additionally, we are proposing solutions for next-generation automotive thermal management, media transport (hydrogen and CO2), and cable protection by applying these technologies. *Please feel free to contact us for more details.

• Other Auto Parts

This is a bellows designed to add and realize pressure sensor functionality to a globe plug. - High fatigue limit design - Supports operating pulsating pressure up to 20MPa - Supports maximum axial displacement of up to 20µm - Supports temperatures above 400℃ - Achieves high cleanliness through manufacturing in a clean room *For more details, please feel free to contact us.

• Other electronic parts

This is a shaft seal bellows that separates fuel and lubricating oil in a direct injection engine's high-pressure fuel pump. - High fatigue limit design - Compatible with operating pressures up to 30 MPa - Sufficient corrosion resistance against fuel - Customization and optimization are also possible (performance, mounting, assembly, cost, etc.) *Please feel free to contact us for more details.

• Other electronic parts

This is a shaft seal bellows that protects the piezo element from fuel inside the injector. - High fatigue limit design - Compatible with operating pulsating pressure up to 30 MPa - Compatible with static pressure over 70 MPa - Customization and optimization are also possible (performance, mounting, assembly, cost, etc.) *Please feel free to contact us for more details.

• Other electronic parts

This is a flexible component designed for thermal expansion absorption and vibration damping in exhaust systems such as those found in engine compartments. - Achieves both flexibility and airtightness through bellows - Compatible with a wide range of connection shapes and diameters - Wire mesh ring (optional) to enhance vibration damping functionality - Suitable for use under high temperatures and high pressures *Please feel free to contact us for more details.

• Piping Materials

This is a flexible component designed to absorb thermal expansion and dampen vibrations in the exhaust system, such as around the turbocharger. - Achieves both flexibility and airtightness with a bellows - Compatible with a wide range of connection shapes and diameters - Wire mesh ring (optional) to enhance vibration damping function *For more details, please feel free to contact us.

• Piping Materials

This product is assembled into modules such as explosion-proof valves and is designed to guide high-temperature gases generated inside the battery during emergencies (such as collisions) to a location that does not affect the occupants. - Stainless steel piping for the emergency discharge of high-temperature gases (approximately 700°C) from inside the battery - Applicable from 48V batteries to high-voltage batteries - Airtight structure - Complies with fire resistance testing (UN-R100-02-S03) *Please feel free to contact us for more details.

• valve

This is piping and flexible hoses for supplying, recovering, and recirculating hydrogen. It is capable of achieving strict airtightness and temperature resistance (both high and low temperatures). - Piping and flexible hoses for operating pressures up to 2MPa - Passed burst tests up to a maximum of 50MPa to ensure safety - Helium leak tests conducted - Various welding certification documents can be issued *Please feel free to contact us for more details.

• hose

This is a product designed for thermal management of battery tabs and cells. Thermal management of battery tabs - A system that directly cools the battery tabs - Integration of cooling and conductivity Thermal management of battery cells - Housing that allows for free flow path design - Lightweight structure utilizing stainless steel thin plate processing technology *For more details, please feel free to contact us.

• Secondary Cells/Batteries

This product is designed to save space by using stainless steel sheet forming instead of conventional aluminum die-cast products. - Housing equipped with cooling functions - Lightweight structure utilizing stainless steel sheet processing technology - Excellent cooling efficiency and pressure loss due to free flow path design *Please feel free to contact us for more details.*

• Generators and transmission motors

The automotive industry is facing significant changes. Alternative drive technologies, intelligent networks, and autonomous driving will shape the future of mobility. As a preferred development partner in the automotive and commercial vehicle sectors, Witzenmann provides solutions for new products in hybrid and electric vehicles through its expertise. 【Technical Characteristics】 ■ Applicable to high-voltage batteries for 48V power supply and high-voltage batteries for hybrid vehicles ■ Airtight structure

• Electrical equipment parts
• Engine parts
• Drive system parts

The automotive industry is facing significant changes. Alternative drive technologies, intelligent networks, and autonomous driving will shape the future of mobility. As a preferred development partner in the automotive and commercial vehicle sectors, Witzenmann provides solutions for new products in hybrid and electric vehicles through its expertise. ■Application Areas Fuel cell vehicles, medium to low pressure range ■Technical Characteristics - Stainless materials certified as per customer specifications - Very high safety: designed for a usage range of 10-20 bar, with burst pressure tests conducted above 500 bar - Implementation of helium leak testing for all units - Customer-specified welding certification and specific welding capability approval certificates

• Electrical equipment parts
• Engine parts
• Drive system parts

The automotive industry is facing significant changes. Alternative drive technologies, intelligent networks, and autonomous driving will shape the future of mobility. As a preferred development partner in the automotive and commercial vehicle sectors, Witzenmann provides solutions for new products in hybrid and electric vehicles through its expertise. 【Features】 ■ Tab cooling ■ Integration of thermal dissipation and electrical coupling functions ■ Temperature management of battery cells ■ Cooling case for heat transfer

• Electrical equipment parts
• Engine parts
• Drive system parts

We possess excellent performance and proven results in heat resistance, pressure resistance, and vibration prevention required within the factory.

• Pipe Fittings

WITZENMANN's expansion joints are used in pipeline projects around the world. They absorb thermal expansion from the outside air, stabilize the piping, and contribute to a stable energy supply.

• Pipe Fittings

WITZENMANN's metal hoses, expansion joints, metal bellows, spring hangers, and constant hangers are ideal for all applications related to plant engineering.

• Pipe Fittings

WITZENMANN's ducts for residential and building use secure space in walls, floors, and ceilings through compact conduits and flexible piping. One example includes flat duct systems and flexible pipe accessories.

• Ventilation and Exhaust

In the aerospace and space sectors, we also handle special-purpose products that apply processing technology from WITZENMANN. Examples include pipes for antenna protection, fuel tank pipes for cable harnesses, vibration isolation systems, and accumulators for the ISS.

• others

In the aerospace industry, products such as cryogenic vacuum pipes, heat-resistant and pressure-resistant pipes, high-sensitivity diaphragm bellows, or long-lasting and robust bellows are required. We provide solutions that meet all of these specifications from our product series.

• Piping Materials
• Pipe Fittings

The internal kerosene pipe has a coaxial outer oil drainage space for leak monitoring. Mobility is ensured by two parallel metal bellows.

• Pipe Fittings
• valve

Two stainless steel coaxial metal hoses ensure flexibility, with the inner tube responsible for pressure resistance and the main transport of the medium, while the outer tube has the function of transporting a different medium or leak detection.

• Pipe Fittings