Flexible metal
elements for
construction
Equipment
The Group
With 24 companies in 19 countries
Witzenmann is number 1 in the industry worldwide.
World leader
Witzenmann is a global group specialising in the design and manufacture of flexible
metal elements. Guided by our vision of "managing flexibility", our company has
become renowned as a reliable manufacturer and as the innovative development
partner of choice within the industry. Today, Witzenmann offers the widest product
range worldwide for the most diverse areas of application. This enables us to offer
the correct solutions time and time again.
Östliche Karl-Friedrich-Str. 134
75175 Pforzheim, Germany
Phone +49 - 7231 581 - 0
Fax +49 - 7231 581 - 820
wi@witzenmann.com
www.witzenmann.de
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Witzenmann GmbH
References
Construction equipment
Atlas Weyhausen, Bomag, Case New Holland, Caterpillar, Doosan Infracore, Hyundai
Heavy Industries, JCB, John Deere, Kion Group, Komatsu, Liebherr, Putzmeister,
Tandano Faun, Terex, Volvo Construction Equipment, Wacker Neuson Group, Wirtgen
Group, Zeppelin Baumaschinen
Flexible metal elements
for construction Equipment
Engines
Bergen Engines, Caterpillar, Cummins, Daimler, Deutz, Fiat Powertrain, GE, MaK, MAN
Diesel & Turbo, MTU, Hyundai Heavy Industries, Paccar, Perkins, STX, Wärtsilä
Trucks/Buses
Bharat-Benz, DAF Trucks, Evobus, Freightliner, Fuso, Irizar, IVECO, MAN, Mercedes Benz,
Van Hool, VDL Bus, Volvo
Agricultural equipment
AGCO, Case New Holland, John Deere
Engine
(Pages 4-5)
Approvals/certificates
Association Euro-Qualiflex
EJMA – Expansion Joint Manufactures Association
Exhaust system
(Pages 6-7)
ISO/TS 16949; ISO/TS 14001
Global Compact
CTPAT
Exhaust gas
aftertreatment
(Page 8)
2
Exhaust system
(Pages 6-7)
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3
ENGINE
Exhaust gas collecting main
Designs
p V-end expansion joint with guiding tubes clamped on both sides
p V-end as turned part for holding a seal and clamps of the guiding tubes
p Counterpart according to customer specification
p Special V-end clip with profile segments made from solid material for relatively
high clamping forces in high-temperature applications
Flexible pipe elements are used on the engine for
absorbing thermal expansion, vibration and for
compensating assembly tolerances. Depending
on the installation situation, the components are
supplied pre-shaped to customised requirements.
This minimises subsequent assembly costs.
Charge air pipe
Areas of application
Exhaust gas area: collecting main, bypass, before and after turbocharger,
charge air; manifold area, oil return pipes.
Designs
p 3-Dimensional design as
p Integrated bend (from in-house production up to DN 150)
p Cast fitting
p Bend in the corrugated area
p Combinations of the different types are possible
Technical characteristics
p Technically oil and gas-tight
p Temperature, pressure and corrosion resistant
p Aging resistant
p Compact design for tight installation conditions
Oil/exhaust gas return pipe
expansion joints
With V-end or flanges
Special expansion elements
With cast connecting parts
Designs
p Integration of diffuser or
inner-sleeve possible
Special Designs
p With and without inner-sleeve
p With and without insulation
Designs
p With inner-sleeve
p With and without insulation
p Design of cast bend according
to customer specifications
p Stainless steel
p Cast iron
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Designs
p 3-Dimensional design as integrated bend or as bend in the corrugated area
p Connection by flange, union nut, V-end connection or according to
customer specification
p With and without insulation or heat shield
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5
Exhaust
system
Structure-borne noise decoupling elements
Designs
p Short, compact metal bellows with external mesh
p With inner sleeve
Decoupling elements or flexible pipe systems are
used in the exhaust line between the engine and
exhaust gas aftertreatment. Decoupling elements
can be configured as bellows or stripwound hose
assemblies.
Stripwound hose assemblies
Technical characteristics
p Optimised flow technology
p Geometric and technical characteristics as well as the connection
technology can be adapted to the particular customised installation
situation
p Technically gas-tight
p Temperature, pressure and corrosion resistant
p Aging resistant
p Decoupling of engine movements, expansion and vibration
p Noise insulation
p Compensation for assembly tolerances
Decoupling elements
Designs
p Circular, oval
p With and without inner liner
p With and without external damping
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Designs
p Corrugated profile
p Interlocked profile
Technical characteristics
p Adequately technically gas-tight, low leakages
p Not sensitive to torsional movements
Pipe systems for the exhaust gas area
Designs
p Optionally segment and/or integrated bend (up to DN 150) from in-house production
p With and without insulation
p Flexible metal element as bellow or stripwound hose
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Exhaust gas
aftertreatment
Decoupling elements or flexible pipe systems
are used within the exhaust gas aftertreatment.
Technical characteristics
p Optimised flow technology
p Geometric and technical characteristics as well as the connection
technology can be adapted to the particular customised installation
situation
p Technically gas-tight
p Temperature, pressure, corrosion and aging-resistant
p Decoupling of thermal expansion and vibration
p Compensation for assembly tolerances
Other
applications
Flexible pipelines and pipe systems are used
in an extremely wide range of configurations.
They are designed to meet the customer's needs
and for use in special applications.
Technical characteristics
p Resistant to diffusion
p Low weight due to thin-walled tubes
p Technically oil and gas-tight
p Temperature, pressure and corrosion resistant
p Aging resistant
Bellows element with
customised connections
Designs
p With and without insulation or heat shield
p With and without inner liner
p 3-Dimensional design profile according to customer specification
Bellows
Designs
p With and without inner sleeve
p With and without inner liner
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9
Pressure tube casing
Areas of application
Leak-tight protection system for injection tubes and single-walled pipes for flammable
liquids (fuel, engine oil, hydraulic oil). Leak detection possibility with connection to
monitoring devices.
Technical characteristics
p Even with large nominal diameters, the flexibility permits adaptation to the particular pipeline routing
p Existing type approvals permit use in maritime applications
Hose assemblies for air
and fluid systems
Piezo injectors
Millimetre
Areas of application
Metal bellows as highly dynamic seal of piezo elements against fuel
Technical characteristics
p Durable design for movement, pressure pulses and vibration excitation:
>1,000,000,000 load cycles
p Pressure pulse up to 300 bar, static pressure stability > 700 bar
p Corrosion resistant against all current fuels
Pipeline for
special media
Areas of application
Cooling water pipe, oil duct, compressed air pipe
Areas of application
Supply pipe systems for flammable and volatile media
Designs
p With and without braiding
p Combinations of flexible hose segments and rigid pipe sections made from
stainless steel or cast elements according to customer specification
p Pipe routing optimised with regard to installation space because of bent segments
Designs
p 3-Dimensional design according to customer specification
p Combination of rigid and flexible elements
Exhaust gas collector
Areas of application
Exhaust gas collector for complete geometries downstream from multiple turbo chargers and on to the customer connection
Areas of application
Flexible hose lines for CO2 high-pressure air-conditioning systems
Designs
p In the coolant area, completely pre-insulated or sheathed pipelines for
direct mounting
Designs
p Completely pre-insulated pipeline for direct assembly on the engine
p Components required for technical flow reasons such as diffusers are integrated in the
pipe system
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