42
Description B-MA20.21-en 06/2007 Rev.01 Dual-chamber air dryer units LTZ 011, LTZ011-H LTZ012, LTZ012-H
Description B-MA20.21-en06/2007 Rev.01
Dual-chamber air dryer unitsLTZ 011, LTZ011-H
LTZ012, LTZ012-H
B-MA20.21-en
06/2007 Rev.01
KNORR-BREMSE SfS ©
2 of 41
1 General information 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.1 Copyright 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 Technical changes 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3 Target group for this document 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4 Notes and warning messages 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 Introduction 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1 Related documents 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 Basic safety information 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1 Validity 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2 Authorized use of the product 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3 Operator’s commitment to due care 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.1 Assignment of personnel 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.2 Availability of the document 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.3 Amendments to the document 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.4 Spares and wearing parts 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4 Technical description 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.1 Technical features 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2 Construction 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3 Working principle 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5 Removal and installation 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1 Installation 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1.1 Requirements 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1.2 Procedure 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1.3 Leakage testing 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1.4 Function testing 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2 Removal 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.1 Requirements 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.2 Procedure 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6 Maintenance 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.1 Inspection 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.1.1 Interval 28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.1.2 Special tools 28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.1.3 Procedure 28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.2 Servicing 29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.2.1 Interval 29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.2.2 Special tools 29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.2.3 Procedure 29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B-MA20.21-en
06/2007 Rev.01
KNORR-BREMSE SfS ©
3 of 41
6.3 Repair 30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.3.1 Auxiliary products and working materials 30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.3.2 Special tool for dual-chamber air dryer units LTZ012, LTZ012-H 30. . . . . . . . . . . .
6.3.3 Procedure 31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.4 Overhaul 38. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.4.1 Interval 38. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7 Troubleshooting 39. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.1 Special tools 39. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.2 Procedure 39. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B-MA20.21-en
06/2007 Rev.01
KNORR-BREMSE SfS ©
4 of 41
1 General information
DANGER
Please read this document carefully from start to finish to ensure safety of
operation and to avoid personal injuries and damage to equipment.
1.1 Copyright
KNORR-BREMSE Systeme für Schienenfahrzeuge GmbH
Moosacher Str. 80, 80809 München, Germany
Department: Technical Documentation
Phone: +49 (89) 3547-0
Fax: +49 (89) 3547-2767
All data is protected by copyright. All rights are reserved. The CD containing cus-
tomer documents from KNORR-BREMSE Systeme für Schienenfahrzeuge GmbH
− called �KB SfS" in the following − may be installed and used on a computer
and a connected printer. A copy of the CD may be made provided it is used for
backup only. Any such copy must bear copyright notes (and trade marks).
A hardcopy of the customer documents may be used in-house if it is marked
�confidential". No part of the customer documents may be transmitted to others in
any form whatever.
Any exception to these rules requires the express, written approval of KB SfS.
1.2 Technical changes
KB SfS reserves the right to change the unit or this document at any time without
giving special notice.
B-MA20.21-en
06/2007 Rev.01
KNORR-BREMSE SfS ©
5 of 41
1.3 Target group for this document
This document is intended for use by KB SfS-trained service technicians who
� have the skill, experience, safety awareness and professional ability
− to remove and install the unit,
− to inspect, service and debug the unit,
� have read and understood this document from start to finish and
� are familiar with the safety codes and accident prevention regulations for
these activities.
NOTE
This document will be useful to other target groups as well, e.g. project
engineers.
However, it does not claim to provide complete information for such target
groups.
B-MA20.21-en
06/2007 Rev.01
KNORR-BREMSE SfS ©
6 of 41
1.4 Notes and warning messages
Warning messages are subdivided into the following hazard levels in this docu-
ment:
DANGER
Failure to comply with these instructions will lead to irreversible personal injuries
which may have fatal consequences.
WARNING
Failure to comply with these instructions may lead to irreversible physical injuries
which may have fatal consequences.
CAUTION
Failure to comply with these instructions may lead to personal injuries and/or to
damage to the unit or the environment.
Safety notes have a specific structure which is explained here for DANGER:
DANGER (= word of alert)
Source of the danger
Consequence of the danger
Remedial measures
Notes do not contain any messages relevant to safety and are intended merely to
complete the reader’s information.
NOTE
Notes contain useful hints and additional information about the unit.
Warning messages in other parts of this Description draw your attention to the
individual risks concerning your use of the product. Warning messages and notes
generally precede the descriptions of the relevant applications.
B-MA20.21-en
06/2007 Rev.01
KNORR-BREMSE SfS ©
7 of 41
2 Introduction
This Description contains particulars specific to the unit and discusses operation,
installation, removal, function testing and maintenance of the unit on board.
2.1 Related documents
The related installation drawing specific to each item number must be consulted.
B-MA20.21-en
06/2007 Rev.01
KNORR-BREMSE SfS ©
8 of 41
3 Basic safety information
3.1 Validity
WARNING
Validity note (item number or type designation) ignored!
The consequences may be personal injuries and damage to the unit.
The validity notes in the document must always be taken into account. The item
number or type designation is stated on the name plate and must agree with the
validity note stated in this document.
This document is valid for units with type designations
LTZ011LTZ011-H
LTZ012LTZ012-H
NOTE
Please contact a KB SfS Service Center if the unit cannot be uniquely identified,
e.g. because the name plate is illegible or missing.
3.2 Authorized use of the product
The unit named in Section 3.1 shall be used only in the system that has been de-
signed and engineered by KB SfS for the accompanying vehicle.
Other applications and assignments, as well as changes, attachments and modifi-
cations may jeopardize the safety, reliability and functionality of the system. They
invalidate any warranty on the part of KB SfS and transfer the liability to the oper-
ator.
KB SfS must always be consulted before any other application or assignment is
implemented.
3.3 Operator’s commitment to due care
3.3.1 Assignment of personnel
The operator shall ensure that the personnel assigned to the specified activities
possesses the qualifications defined for the given target group.
3.3.2 Availability of the document
The operator shall ensure that the present document is always available to the rel-
evant personnel in a complete, up-to-date and readable form.
B-MA20.21-en
06/2007 Rev.01
KNORR-BREMSE SfS ©
9 of 41
3.3.3 Amendments to the document
The operator shall ensure that, at the place of use, the present document is reg-
ularly amended by, or replaced with, instructions based on:
� statutory accident prevention regulations
� statutory accident protection regulations
� trade association regulations
3.3.4 Spares and wearing parts
The operator shall ensure that none other than genuine KB SfS parts or KB SfS-
approved spares or wearing parts are used.
The installation of spares other than approved may impair the safety and reliability
of the given unit and overall system and invalidates any warranty on the part of
KB SfS.
B-MA20.21-en
06/2007 Rev.01
KNORR-BREMSE SfS ©
10 of 41
4 Technical description
The model LTZ011, LTZ011-H, LTZ012 and LTZ012-H dual-chamber air dryer units
dry the compressed air to an insignificant residual level and largely prevent mois-
ture from getting inside compressed air systems and causing pneumatic equip-
ment to malfunction and wear prematurely as a result of corrosion and potential
freezing.
4.1 Technical features
See Fig. 1
The unit performs the following main function:
� Reducing the humidity level of the compressed air to an insignificant residual
amount.
Moisture in the compressed air of pneumatic systems may cause the pneumatic
equipment to malfunction and wear prematurely as a result of corrosion and po-
tential freezing.
Atmospheric air always contains water vapour. As long as the moisture stays in
the form of vapour, it is bound inside the air. Only when the saturation limit is ex-
ceeded (= 100% relative humidity), is the water precipitated in the form of
droplets, fog or snow.
Fig. 1 shows how the saturation limit varies with temperature, and how the air is
able to absorb more moisture with rising temperature. This explains why water
cannot be precipitated as the temperature of the air in the compressor rises dur-
ing compression. Precipitation only takes place when the air from the compressor
is cooled down again in the aftercooler.
Let us now illustrate this process in a simple arithmetic example.
At an ambient temperature of +30°C and relative humidity of 80%, one cubic
metre of aspirated air contains 24.5 g water in the form of water vapour.
Hence, one cubic metre of compressed air at 10 bar gauge contains
11 × 24.5 g = 269.5 g water. The temperature of the air rises with increasing com-
pression. After being cooled down to 50°C, however, the air in its saturated state
can hold only 83 g/m3 water vapour, which means that 269.5−83 = 186.5 g/m3
water are precipitated.
This example demonstrates quite clearly that the air in pneumatic systems is al-
ways saturated after being cooled down.
Consequently, any further temperature drop due to natural cooling will cause
precipitation, leading in turn to commonly known problems such as corrosion and
freezing.
Let us now continue our example to illustrate the matter still further.
As the compressed air cools down from 50°C to 20°C it deposits a further quan-
tity of 66 g/m3 water, while cooling to 10°C will produce as much as 74 g/m3.
This arithmetic example shows what a considerable amount of water is still left in
the pneumatic system in the form of vapour, even after the air has been well
cooled in the compressor and the precipitate removed.
B-MA20.21-en
06/2007 Rev.01
KNORR-BREMSE SfS ©
11 of 41
However, a pneumatic system can only work reliably and efficiently if the air in the
system is dried so well that the relative humidity always stays below 35%. Atmos-
pheric corrosion does not take place below this �critical moisture" level, even
when the air contains so-called corrosion stimulators such as acids.
The air dryer units named above work on the heatless regenerative adsorption
principle. This method has proved reliable in rail vehicles in particular, and is the
most efficient arrangement known for this application.
This principle is based on the following physical process.
Humid compressed air flows through a desiccant (adsorbent) of crystalline metal
aluminosilicates which by virtue of their molecular structure have extraordinarily
large, specific inner surfaces and thus withdraw water vapour from the passing air.
Compared with other desiccants, they have the decisive advantage that they are
largely unaffected by oil. The silicate has very regular pore openings sized just to
allow the water molecules to be adsorbed, while the larger oil molecules cannot
be coadsorbed.
Fig. 1 Absolute water content as a function of air temperature
X 100% relative humidity
Y Air temperature (°C)
Z Absolute water content (g/m3)
B-MA20.21-en
06/2007 Rev.01
KNORR-BREMSE SfS ©
12 of 41
4.2 Construction
See Fig. 4 and 5
NOTE
The schematic in Fig. 5 shows a representative construction of a model LTZ012
dual-chamber air dryer unit. The construction of the air dryer units discussed in
the present document differs only in minor details from this representation.
The part numbers used in the following text relate to the dual-chamber air dryer
unit LTZ012 shown in Fig. 4 and 5.
The dual-chamber air dryer units LTZ011, LTZ011-H, LTZ012 and LTZ012-H de-
scribed here consist essentially of the following:
� Two desiccant towers (1), each with an integrated oil separator, and consisting
of bowl (1.10) full of Raschig rings (1.9); versions LTZ011 and LTZ011-H have
two filter cartridges (see Fig. 2)
� Bracket (21) with regeneration choke (61) and the following valves:
− two check valves (26) for the towers,
− a precontrol valve (39) for the control air,
� Duplex piston valve (14)
� Silencer (17) to discharge the regeneration air and to drain the unit
� Valve magnet (27)
� Electronic circuit board (28) for cycle timing
Dual-chamber air dryer units LTZ011 and LTZ012 designated additionally by �-H"
are equipped with a thermostat-controlled cartridge heater as well.
The model LTZ011, LTZ011-H dual-chamber air dryer units have fully exchange-
able filter cartridges (1, Fig. 2) instead of the towers (1).
The model LTZ012, LTZ012-H dual-chamber air dryer units can be equipped with
a slide-in frame (see Fig. 3).
All versions come in variants differing according to the diameter of the regener-
ation choke, the electric connection and the length of the working cycle.
The units can therefore be matched very widely to all possible working conditions.
B-MA20.21-en
06/2007 Rev.01
KNORR-BREMSE SfS ©
13 of 41
Fig. 2 Dual-chamber air dryer unit LTZ011-H (example)
1 Filter cartridge
2 Bracket
17 Duplex piston valve
20 Silencer
26 Valve magnet
57 Housing
A1 Air inlet
A2 Air outlet (optionally us-
able)
E1 Opening for electric con-
nection
K3 Regeneration air outlet
B-MA20.21-en
06/2007 Rev.01
KNORR-BREMSE SfS ©
14 of 41
Fig. 3 Dual-chamber air dryer unit LTZ012-H with a frame (example)
B-MA20.21-en
06/2007 Rev.01
KNORR-BREMSE SfS ©
15 of 41
Fig. 3 (continued) Dual-chamber air dryer unit LTZ012-H with a frame (example)
1 Air dryer unit
2 Frame
3 Deep-groove ball bearing
4 Retaining ring
5 Swivel fitting
6 Pipe
7 Machine screw
8 Lock washer
9 Extension
10 O-ring
11 Thrust screw
12 Thrust ring
13 Sealing ring
14 Pipe
15 Screw plug
16 Sealing ring
17 Thrust screw
18 Sealing ring
19 Thrust ring
20 Extension
21 O-ring
22 Rubber-jacketed cable
23 Connecting case
24 Connector
25 Socket case
30 Rivet
31 Name plate
32 Female connector
34 Sleeve insert
A1 Air inlet
A2 Air outlet
E1 Electric connection
K3 Regeneration air outlet
B-MA20.21-en
06/2007 Rev.01
KNORR-BREMSE SfS ©
16 of 41
Fig. 4 Dual-chamber air dryer unit LTZ012-H (example)
1 Tower
1.5 Bolt
1.10 Bowl
14 Duplex piston valve
17 Silencer
21 Bracket
27 Valve magnet
28 Circuit board
57 Housing
A1 Air inlet
A2 Air outlet
E1 Opening for electric con-
nection
K3 Regeneration air outlet
B-MA20.21-en
06/2007 Rev.01
KNORR-BREMSE SfS ©
17 of 41
Fig. 5 Dual-chamber air dryer unit LTZ012 (schematic)
1.. Tower
1.5 Bolt
1.6 Desiccant
1.9 Raschig rings
1.10 Bowl
14 Duplex piston valve
14.4 Piston
14.5 KNORR K-ring
14.8 KNORR K-ring
14.10 Piston
17 Silencer
21 Bracket
26.. Valve head, check valve
27 Valve magnet
38 KNORR K-ring
39 Piston, precontrol valve
A1 Air inlet
A2 Air outlet
O.. Exhaust port
K3 Regeneration air outlet
V.. Valve seat
B-MA20.21-en
06/2007 Rev.01
KNORR-BREMSE SfS ©
18 of 41
Fig. 6 Pneumatic diagram LTZ012
1 Tower
14 Duplex piston valve
17 Silencer
21 Bracket
26 Check valve
27 Valve magnet
39 Precontrol valve
61 Choke
A1 Air inlet
A2 Air outlet
K3 Regeneration air
outlet
4.3 Working principle
See Fig. 4 to 7
Functional characteristics
A heatless regenerative adsorption dryer of the dual-chamber type operates simul-
taneously in two phases, i.e. drying and regeneration run in parallel. While the
main airstream is being dried in one of the towers, the desiccant is being regener-
ated in the other.
Functional description
Fig. 5 shows the air dryer unit in the operating state in which the tower (1a) is dry-
ing and the tower (1b) is regenerating.
The valve magnet (27) is energized by the electric input signal coming from the
cycle timer; the valve seat V3 is open. The compressed air drawn off the air pipe
to the port A2 flows through the open valve seats V2 and V3 to the duplex piston
valve (14).
B-MA20.21-en
06/2007 Rev.01
KNORR-BREMSE SfS ©
19 of 41
NOTE
The precontrol valve (39) is designed to prevent the duplex piston valve (14) from
assuming an intermediate position. It opens only after the necessary shuttling
pressure has been reached.
The shuttling pressure pushes the pistons (14.4) and (14.10) to the top and bot-
tom positions against the acting spring forces, and thereby opens the valve
seats V5 and V8.
Having been cooled down and predrained, the compressed air delivered by the
compressor flows through the port A1 and the open valve seat V5 to the
tower (1a), passes through this tower from bottom to top and is subsequently redi-
rected down through the central tube and the check valve (26a) to the port A2.
Before the air can enter the desiccant (1.6), it is first carried through the Raschig
ring filling (1.9) in the oil separator (bowl 1.10). Being repeatedly deflected, swirled
and impacted, the minute droplets of oil and water that are still suspended in the
compressed air are precipitated on the relatively large surfaces of the Raschig
rings. They gather to form larger drops which then fall under gravity into the col-
lecting chamber.
As the air passes subsequently through the desiccant it gives off so much of its
water content that the relative humidity of the compressed air leaving the
tower (1a) is less than 35%.
Some of the air thus dried is drawn off, expanded through the regeneration
choke (61) and conveyed through the desiccant in the tower (1b) in the opposite
direction. This expanded air, which is also known as regeneration air, extracts the
moisture from the desiccant that is to be regenerated, and escapes to atmosphere
through the open valve seat V8 and the silencer (17).
Shortly before the desiccant reaches its saturation limit, the unit is shuttled by the
electric cycle timer at T/2 (see Fig. 7), i.e. the valve magnet (27) is deenergized.
The valve seat V3 is closed and the valve seat V4 opened. The control line to the
duplex piston valve�(14) is vented.
As a result, the spring forces push the pistons to the top and bottom positions,
respectively. This action closes the valve seats V5 and V8 and opens the valve
seats V6 and V7.
In this condition, the main airstream (A1 −> A2) is dried in the tower (1b) and the
desiccant is regenerated in the tower (1a). Fig. 7 shows the cycle timing and the
various working phases.
To work correctly, the unit requires a certain shuttling pressure at which the pre-
control valve (39) opens and the duplex piston valve (14) can shuttle.
The two check valves (26) prevent the main reservoir and the onboard pipes from
being vented while the compressor is idle.
B-MA20.21-en
06/2007 Rev.01
KNORR-BREMSE SfS ©
20 of 41
Fig. 7 Diagram of one working cycle
1) Regeneration phase
2) Drying phase
1.. Desiccant tower
T Working cycle
Cycle timing
The cycle timer is switched on together with the compressor. It controls the ON
and OFF times of the valve magnet (27) according to a fixed program.
When the compressor is off or idling, the cycle timer remembers the actual state
and continues the count when the compressor is switched on again. This arrange-
ment ensures that the desiccant to be regenerated is dried entirely and will not get
oversaturated in case the working cycle is displaced.
The air dryer unit is controlled in such a way that compressed air can always con-
tinue flowing through one of the desiccant towers, even if the shuttling facility
works irregularly.
Rating
See Fig. 8
The desiccant towers and the regeneration air choke orifice must be sized to en-
sure that − above a certain ambient temperature limit − the relative humidity of
the dried air is always below 35%.
The performance of an air dryer unit depends on the amount of desiccant used
and on the regeneration air consumption. It is described by the following para-
meters:
� Compressor’s volumetric intake
� Working pressure
� Air inlet temperature
� Ambient temperature limit
� Working cycle
The ratio of desiccant quantity to regeneration air consumption is optimized for
the conditions under which the air dryer units are required to operate in rail ve-
hicles.
B-MA20.21-en
06/2007 Rev.01
KNORR-BREMSE SfS ©
21 of 41
Please observe the following notes on the ambient temperature limit.
It is not advisable to rate an air dryer unit for ambient temperatures below −30°C
if such values occur just rarely within the vehicle’s range of operation. KB SfS
dual-chamber air dryer units are engineered to yield a pressure dew point reduc-
tion of at least 10°C relative to ambient temperature (see Fig. 8). At ambient tem-
peratures below -30°C there is very little risk of corrosion due to elevated humid-
ity; this means the air dryer units can be operated at levels as low as -40°C
without any thought of danger.
The duplex piston valve in the model LTZ�011-H and LTZ012-H air dryer units is
heated by a thermostat-controlled cartridge heater to prevent it from freezing. The
condensate can therefore be discharged reliably to the drainage outlet under all
conditions.
To keep the air dryer units performing at their most efficient level, you should en-
sure that their air inlet temperature is not much above ambient temperature and
never exceeds 60°C.
Fig. 8 Relationship between pressure dew point, ambient temperatureand relative humidity
X Ambient temperature
(°C)
Y Pressure dew point
(°C)
ϕ Relative humidity (%)
B-MA20.21-en
06/2007 Rev.01
KNORR-BREMSE SfS ©
22 of 41
5 Removal and installation
DANGER
Beware of a moving vehicle!
A vehicle allowed to move inadvertently will cause personal injury.
It is vital to observe the working rules for arresting a vehicle.
5.1 Installation
CAUTION
Beware of contaminating the pneumatic system!
Device and/or system functions will fail.
Keep out dirt during installation. If necessary, blow out the pipes of the
pneumatic system.
CAUTION
Beware of disregarding the installation instructions!
Safety will be diminished and functions restricted.
Installation instructions and installation drawings must be taken into account.
CAUTION
Beware of installing untested units!
Safety will be diminished and functions restricted.
Make sure that units are always tested before they are installed.
The system must have been tested and found to be in order before the vehicle is
cleared for service.
NOTE
It is vital to observe the maker’s safety instructions and directions for the use of
cleaning substances, sealants, adhesives, auxiliary products, working
substances, etc.
5.1.1 Requirements
See Fig. 9
The unit can be installed with standard tools.
The unit is designed for installation anywhere in the sprung part of a vehicle, pro-
vided it is protected from wet and dirt. The place of installation must be defined
accordingly when the vehicle is being engineered.
B-MA20.21-en
06/2007 Rev.01
KNORR-BREMSE SfS ©
23 of 41
To keep the air dryer units performing at their most efficient level, you should en-
sure that their air inlet temperature (A1) is not much above ambient temperature.
On no account may the air dryer unit be installed in the immediate vicinity of
sources of heat that might additionally elevate the desiccant temperature.
A good aftercooler (N) downstream of the compressor (K) lowers the air inlet tem-
perature and, hence, the temperature of the desiccant as well. However, the desic-
cant should not fall below a temperature of +10°C.
Fig. 9 shows how an effective aftercooler influences the temperature and water
content of the air prior to entering the air dryer unit. At +50°C inlet temperature,
the air still contains 83 g/m3 water, but only 23 g/m3 at +25°C.
Fig. 9 Construction of an air supply system (schematic)
a Poor aftercooler
b Good aftercooler
T Temperature (°C)
W Water content (g/m3)
K Compressor
N Aftercooler
LTZ Air dryer unit
HL Pipe to main reservoir
B-MA20.21-en
06/2007 Rev.01
KNORR-BREMSE SfS ©
24 of 41
The supply line from the compressor to the air dryer unit must be rustproof steel.
Before attaching any piping to an air dryer unit, take care to remove all traces of
dirt, scale and chippings from inside this piping.
The installation drawing of the unit contains mandatory notes on the mounting
position and necessary clearances.
The vehicle builder’s documents on installation − especially the data on fastening
screws and tightening torques − must also be observed.
5.1.2 Procedure
See Fig. 4
WARNING
Beware of electric shock!
Danger of physical injuries that may have fatal consequences.
Before starting work, switch off the power supply to the electric connection and
prevent it from being restored without due authorization.
� Prior to installing the dual-chamber air dryer unit, thoroughly clean the sealing
surfaces and threads.
� Carefully blow off and blow out the pipes with compressed air to remove and
expel any trace of dirt.
� Locate the air dryer unit on the onboard rack and attach by its fastening
screws.
� Connect the pipes for compressed air inlet and compressed air outlet to the
air dryer unit.
NOTE
Connect the electric circuits correctly. Refer to the applicable vehicle documents,
the circuit diagram of the unit, and the circuit diagrams valid for each of the
component assemblies.
� Connect the ground circuit between the air dryer unit (see ground tag) and
vehicle rack.
� Detach housing (57), run the onboard connecting cable through the bracket
and connect as shown in the circuit diagram.
� Re-attach housing (57).
� Version with a connector: Plug in the connector.
B-MA20.21-en
06/2007 Rev.01
KNORR-BREMSE SfS ©
25 of 41
5.1.3 Leakage testing
WARNING
Beware of electric shock!
Danger of physical injuries that may have fatal consequences.
The work of testing a unit equipped with electric components must always be left
to specially trained and authorized personnel.
Never allow a leakage testing substance to get into contact with electrically live
components.
Carry out the leakage test by applying a leakage testing substance. The test may
be performed alternatively with a soap solution if no such special products are
available.
� Test the pipe connections for leakage at the maximum acceptable working
pressure. Air bubbling is unacceptable.
� Leakage testing substances and all traces of soap must be removed immedi-
ately after the test.
5.1.4 Function testing
The unit is an integral part of a system and must be tested for correct interaction
with this system in the manner instructed by the railway administration / vehicle
builder.
5.2 Removal
WARNING
Pneumatic system is under high pressure!
Particles flung outwards will, for instance, cause severe eye injuries.
Observe the safety regulations for pneumatic systems.
Prior to removal, unload the pressure from the (sub-)system.
CAUTION
Beware of contaminating the pneumatic system!
Device and/or system functions will fail.
Keep out dirt after removal, such as by masking the ports.
5.2.1 Requirements
The unit can be removed with standard tools.
B-MA20.21-en
06/2007 Rev.01
KNORR-BREMSE SfS ©
26 of 41
5.2.2 Procedure
See Fig. 4
WARNING
Beware of electric shock!
Danger of physical injuries that may have fatal consequences.
Before starting work, switch off the power supply to the electric connection and
prevent it from being restored without due authorization.
� Turn off the supply of compressed air and entirely vent all the air pipes con-
nected to the unit.
� Switch off the power supply and prevent it from being restored. Do not allow
electric power to reach the air dryer unit any longer.
� Unplug the connector from the mating socket.
� If your version does not have a connector, detach housing (57) from the air
dryer unit, disconnect the onboard connecting cable and then re-attach hous-
ing (57).
� Disconnect the pipes for compressed air inlet and compressed air outlet from
the air dryer unit.
� Disconnect the ground circuit between the air dryer unit and vehicle frame.
� Remove the fastening screws and lift the air dryer unit off the onboard rack.
� Cover up the ports of the air dryer unit.
� Cover up the onboard air pipes unless a replacement air dryer unit is going to
be fitted immediately after removal.
B-MA20.21-en
06/2007 Rev.01
KNORR-BREMSE SfS ©
27 of 41
6 Maintenance
Maintenance at KB SfS is basically subdivided into:
� Inspection � Servicing � Repair � Overhaul
The maintenance intervals required for the activities described below must be
timed according to the statutory operating requirements, the service conditions
under which the unit is used, and the environmental influences in the area where
the vehicles are run. An interval stated generally for all projects will therefore be of
only limited validity.
KB SfS has the capacity to test the state of its products regularly during their life-
time. The aim of this service is to find jointly with the customer the best mainten-
ance interval for each individual project. The interval applicable to a specific pro-
ject can be derived from the targets named in the table. The first target is always
more significant than the successively lesser targets.
The following tables contain an overview of the necessary maintenance activities.
6.1 Inspection
The unit must be checked for good external condition and correct operation at
regular intervals as specified by the vehicle operator.
B-MA20.21-en
06/2007 Rev.01
KNORR-BREMSE SfS ©
28 of 41
6.1.1 Interval
Activity Interval Valid for
Function test-
ing (the cycle
timer must be
inspected and
the main reser-
voir checked
for water)
1. According to vehicle operator’s project-spe-
cific experience
For all item
numbers cov-
ered by the
validity
2. In accordance with project-specific main-
tenance schedule, if any (*)
Making sure
that the si-
lencer’s regen-
eration air
outlet K3 is
clear
3. According to vehicle operator’s project-spe-
cific experience
4. In accordance with project-specific main-
tenance schedule, if any (*)
Function test-
ing with a pres-
sure dew point
meter**
5. Once a year before winter starts
* If a project-specific maintenance schedule is drawn up, it must be worked out jointly by the cus-
tomer and KB SfS.
** Activity is recommended (see Fig. 10)
6.1.2 Special tools
Item number Name
II 51382 Pressure dew point meter
6.1.3 Procedure
See vehicle operator’s instructions
B-MA20.21-en
06/2007 Rev.01
KNORR-BREMSE SfS ©
29 of 41
Fig. 10 Measuring the pressure dew point
B Main reservoir
DM Pressure dew point
meter
F Micromesh oil filter
K Compressor plus af-
tercooler
L Air dryer unit
S Safety valve
The air dryer unit can be monitored accurately for correct operation using a pres-
sure dew point meter (see Fig. 10). The dew point reading must be below the
boundary curve of 35% relative humidity at the prevailing ambient temperature.
6.2 Servicing
Servicing the air dryer units named in the present Description is confined to
changing the filter cartridges (1, Fig. 2) in units LTZ011 and LTZ011-H.
6.2.1 Interval
Activity Interval Valid for
Changing the
filter cartridges
1 year
LTZ011,
LTZ011-H1. In accordance with project-specific main-
tenance schedule, if any (*)
* If a project-specific maintenance schedule is drawn up, it must be worked out jointly by the cus-
tomer and KB SfS.
6.2.2 Special tools
Strap wrench to release filter cartridges (1, Fig. 2)
6.2.3 Procedure
Change the filter cartridges in accordance with Section 6.3.
B-MA20.21-en
06/2007 Rev.01
KNORR-BREMSE SfS ©
30 of 41
6.3 Repair
Please contact a KB SfS Service Center if the unit develops a malfunction that
cannot be corrected by the measures described in Section 7.2.
Notes on repair, exchanging the desiccant
The desiccant will not need exchanging if it gets oversaturated as a result of a
malfunction in the air dryer unit, e.g. a cycle timing failure. The desiccant is regen-
erated automatically as soon as the unit starts to work normally again. Depending
on the degree of oversaturation, the unit may take several hours of compressor air
delivery until it has fully recovered.
The main reservoir will have to be well drained if large amounts of water have col-
lected there after an air dryer failure.
The life of the desiccant is virtually unlimited under good service conditions. As a
rule, it will be sufficient to exchange the desiccant of units LTZ012 and LTZ012-H
at the time of the main vehicle inspection. However, the desiccant may have to be
exchanged prematurely if it is severely contaminated by dirt and oil.
6.3.1 Auxiliary products and working materials
The following auxiliary products and working materials are needed; they can be
purchased from KB SfS by their order numbers (where stated):
� Chemical cleaning spirit for aluminium alloys, eroding less than 420 mg/(m2 h)
� Grease (order number: ID No. 502647)
� for LTZ012, LTZ012-H: Desiccant (order number: ID No. 503328 or ID No.
503329), see related parts list
� for LTZ011, LTZ011-H: Filter cartridge (item number II17793)
6.3.2 Special tool for dual-chamber air dryer units LTZ012, LTZ012-H
� Special tool according to Fig. 11
Special tools can be purchased from KB SfS by their order numbers (where
stated). Special tools without an order number must be made to the specifications
in the figures. The dimensions specified in the figures are mandatory values. Un-
specified dimensions are left to the toolmaker’s discretion.
B-MA20.21-en
06/2007 Rev.01
KNORR-BREMSE SfS ©
31 of 41
Fig. 11 Thrust member (D)
C11220/3
6.3.3 Procedure
The towers (1) or filter cartridges (1) must be removed before the desiccant can
be exchanged. If lack of space makes this impossible while the air dryer unit is
still on board, the air dryer unit will have to be removed in accordance with Sec-
tion 5.2.
DANGER
Beware of a moving vehicle!
A vehicle allowed to move inadvertently will cause personal injury.
It is vital to observe the working rules for arresting a vehicle.
WARNING
Pneumatic system is under high pressure!
Particles flung outwards will, for instance, cause severe eye injuries.
Prior to removal, unload the pressure from the (sub-)system and observe the
safety regulations for pneumatic systems.
CAUTION
Beware of contaminating the pneumatic system!
Device and/or system functions will fail.
Keep out dirt after removal, such as by masking the ports.
B-MA20.21-en
06/2007 Rev.01
KNORR-BREMSE SfS ©
32 of 41
WARNING
Pretensioned spring (spring force up to about 400 N)!
Pretensioned springs may jump abruptly out of the housing and cause, say,
severe eye injuries.
Perform all the working steps in the specified sequence and use no tools other
than named.
CAUTION
Undue disposal of substances harmful to the environment!
This would mean unnecessary and legally punishable harm to the environment.
Observe the officially applicable waste disposal regulations.
CAUTION
Beware of incorrect handling!
Malfunctions and/or leakage due to damaged sealing surfaces.
Take care not to damage the sealing surfaces in the course of dismantling,
assembling and cleaning the unit.
Exchanging filter cartridge (1) (LTZ011, LTZ011-H)
� Turn off the supply of compressed air and entirely vent all the air pipes con-
nected to the unit.
� Switch off the power supply and prevent it from being restored. Do not allow
electric power to reach the air dryer unit any longer.
� Exchange the filter cartridges. Use a strap wrench to release the filter car-
tridge.
Dismantling the towers (LTZ012, LTZ012-H)
See Fig. 4, 11, 12, 13 and 14
� Turn off the supply of compressed air and entirely vent all the air pipes con-
nected to the unit.
� Switch off the power supply and prevent it from being restored. Do not allow
electric power to reach the air dryer unit any longer.
� Release bolt (1.5), and remove tower (1) from the bracket.
� Turn over the tower (1) and put down on the press bed.
� Apply thrust member (D) to spring retainer (1.12).
� Lower the press punch onto thrust member (D), and adjust the press force to
480 N.
� Unscrew the unloaded nut (1.13).
� Slowly draw back the press punch and remove the unloaded compression
spring (1.11).
� Dismantle the tower (1) (see Fig. 14).
B-MA20.21-en
06/2007 Rev.01
KNORR-BREMSE SfS ©
33 of 41
Fig. 12 Removing and installing the compression spring
1.1 Tower
1.11 Compression spring
1.12 Spring retainer
1.13 Nut
D Thrust member
CAUTION
Undue disposal of substances harmful to the environment!
This would mean unnecessary and legally punishable harm to the environment.
Observe the officially applicable waste disposal regulations.
� Tip out and discard the desiccant (1.6).
B-MA20.21-en
06/2007 Rev.01
KNORR-BREMSE SfS ©
34 of 41
Cleaning the component parts
WARNING
Beware of using auxiliary products and working materials incorrectly!
The skin or respiratory tracts may be harmed or inflamed.
It is vital to observe the maker’s safety codes and directions for use.
NOTE
Prior to putting components in a bath for cleaning, check them for compatibility
with the chemical cleaning spirit. Any component suspected of attack by the
chemical cleaning spirit must be handled and cleaned like a non-metallic part.
� Clean all metal parts with chemical cleaning spirit in a bath at 70°C to 80°C
and then blow dry with compressed air. Read the notes and details on clean-
ing substances in Section 6.3.1.
� Clean all non-metallic parts with a cold cleaning substance and wipe dry with
a cloth.
B-MA20.21-en
06/2007 Rev.01
KNORR-BREMSE SfS ©
35 of 41
Fig. 13 Removing and installing the tower (1)
1 Tower
(1) Filter cartridge
2 O-ring
3 O-ring
4 Ring
5 O-ring
21 Bracket
B-MA20.21-en
06/2007 Rev.01
KNORR-BREMSE SfS ©
36 of 41
Fig. 14 Tower (1)
1.1 Tower
1.2 Washer
1.3 O-ring
1.4 Strainer
1.5 Bolt
1.6 Desiccant
1.7 Retaining ring
1.8 Strainer
1.9 Raschig rings
1.10 Bowl
1.11 Compression spring
1.12 Spring retainer
1.13 Nut
1.14 Sign
Filling up with desiccant
� Put strainer (1.4) in tower (1.1).
� Close the pipe opening (see Fig. 15) and fill up with desiccant.
B-MA20.21-en
06/2007 Rev.01
KNORR-BREMSE SfS ©
37 of 41
� Compact the desiccant by tapping the tower wall gently with a rubber-headed
hammer while simultaneously turning the tower to and fro.
CAUTION
Beware of assembling the unit incorrectly!
The unit might malfunction or its performance be impaired.
To operate the air dryer unit correctly, fill the towers with enough desiccant to
locate the bottom of bowl (1.10) 37mm below the tower rim (see Fig. 15).
Fig. 15 Filling up with desiccant
C11220/2
* Close the tube opening
Assembling the tower (1)
See Fig. 4, 11, 12, 13 and 14
� Assemble the tower (1) in the reverse sequence to disassembly.
� Lubricate O-rings (2) and (3) and O-ring (5) with a thin film of grease.
� Insert a new greased O-ring (1.3) and washer (1.2), and attach tower (1) to
bracket (21) by bolt (1.5); tightening torque 200 Nm.
NOTE
Drain and dry the main reservoir after the desiccant has been exchanged, yet
before the air dryer unit is returned to service.
� Carry out the leakage test in accordance with Section 5.1.3.
B-MA20.21-en
06/2007 Rev.01
KNORR-BREMSE SfS ©
38 of 41
6.4 Overhaul
KB SfS gives top priority to safety and quality.
To guarantee this claim, KB SfS offers to overhaul its own products. KB SfS per-
forms overhauls in its capacity as the original equipment manufacturer, while ac-
counting for the safety aspects of the production processes.
The KB SfS Service Centers have the experience and technical equipment needed
for performing professional overhauls.
6.4.1 Interval
To judge when overhauls are required under the actual service conditions, you are
urged to inspect a few randomly selected units for functionality and condition after
a sufficient period of operation, and dismantle them to check for wear.
Activity Interval
Overhaul
1. According to vehicle operator’s project-specific experience
2. In accordance with project-specific maintenance schedule, if
any (*)
* If a project-specific maintenance schedule is drawn up, it must be worked out jointly by the cus-
tomer and KB SfS.
B-MA20.21-en
06/2007 Rev.01
KNORR-BREMSE SfS ©
39 of 41
7 Troubleshooting
If the unit starts to malfunction, trace possible problems on board. Causes of
trouble can be corrected with the help of the directions proposed for debugging.
7.1 Special tools
Not required
7.2 Procedure
Problem Cause Remedy
Air dryer unit inoperat-
ive
Unit not being acti-
vated pneumatically
Test the unit for correct pneumatic
control.
Unit not being acti-
vated electrically
Test the unit for correct electric
control.
Air discharging con-
stantly from the air pipe
connections
Air pipe connec-
tions leaking
Tighten the air pipe connections
and test for leakage in accord-
ance with Section 5.1.3.
White coating forming
at regeneration air
outlet K3
Desiccant is no
longer good
Exchange the desiccant as de-
scribed in Section 6.3.
Only for LTZ011-H,
LTZ012-H: MR pressure
not rising, although
compressor is running
Air dryer frozen be-
cause heater has
failed
Thaw out the duplex piston valve.
Remove the unit as described in
Section 5.2 and ship to a KB SfS
Service Center for repair.Regeneration air not
discharging from the si-
lencer’s regeneration air
outlet K3 while the com-
pressor is delivering air
Unit defective
B-MA20.21-en
06/2007 Rev.01
KNORR-BREMSE SfS ©
40 of 41
Problem RemedyCause
Strong stream of air
from the silencer’s re-
generation air outlet K3
(provided the air dryer
unit is working correctly,
regeneration air must
be discharged as usual
while the compressor is
delivering air)
Unit defective Remove the unit as described in
Section 5.2 and ship to a KB SfS
Service Center for repair.
Air discharging con-
stantly from exhaust
port O2 (provided the
air dryer unit is working
correctly, a short blast
of air must be dis-
charged at intervals of 4
minutes every second
time the valve magnet
toggles while the com-
pressor is delivering air)
Valve magnet (43) not
toggling while the com-
pressor is delivering air
(the working cycle must
be 2 minutes) and air
not discharging from
exhaust port O2
Air discharging con-
stantly from exhaust
port (O1)
Pressure dew point
above the boundary
curve of 35%
Desiccant dirty Exchange the desiccant as de-
scribed in Section 6.3.
* Observe the following note on disposal.
CAUTION
Undue disposal of substances harmful to the environment!
This would mean unnecessary and legally punishable harm to the environment.
Observe the officially applicable waste disposal regulations.
B-MA20.21-en
06/2007 Rev.01
KNORR-BREMSE SfS ©
41 of 41
Notes:
B-MA20.21-en
06/2007 Rev.01
KNORR-BREMSE SfS ©
42 of 41
DKnorr-BremseSysteme für Schienenfahrzeuge GmbHMoosacher Str. 80
80809 Munich
Germany
Phone: +49 89 3547-0
Fax: +49 89 3547-2767
USANew York Air Brake Corporation748 Starbuck Avenue
Watertown, NY 13601
USA
Phone: +1 315 786-52 00
Fax: +1 315 786-56 76
AKnorr-Bremse GmbHBeethovengasse 43-45
2340 Mödling
Austria
Phone: +43 2236 409-0
Fax: +43 2236 409-412
CDNKnorr Brake Ltd.675 Development Drive
Kingston, Ontario K7M 4W6
Canada
Phone: +1 613 389-46 60
Fax: +1 613 389-87 03
CHOerlikon-Knorr Eisenbahntechnik AGMandachstrasse 50
8155 Niederhasli
Switzerland
Phone: +41 44 852-31 11
Fax: +41 44 852-31 31
BRKnorr-BremseSistemas para Veículos Ferroviários Ltda.Av. Engenheiro Eusébio Stevaux, 1071
Jurubatuba, 04696-902 São Paulo
Brazil
Phone: +55 11 5681-1129
Fax: +55 11 5686-8344
GBKnorr-Bremse Rail Systems (UK) Ltd.Westinghouse Way, Hampton Park East
Melksham, Wiltshire SN12 6TL
United Kingdom
Phone: +44 1225 898 700
Fax: +44 1225 898 705
RSAKnorr-Bremse (SA) (Pty) Ltd.3 Derrick Road (Corner Chestnut Road)
1619 Spartan
South Africa
Phone: +27 11 961-7800
Fax: +27 11 975-8249
HKnorr-Bremse Vasúti JármûRendszerek Hungária Kft.Helsinki út 86.
1201 Budapest
Hungary
Phone: +36 1 421 1100
Fax: +36 1 421 1192
INDKnorr-Bremse India Private Ltd.14/6 Mathura Road
Faridabad-121003 Haryana
India
Phone: +91 129 227-64 09
Fax: +91 129 227-59 35
ESociedad Española de FrenosCalefacciõn y Señales, S.A.Nicolás Fúster, 2
28320 Pinto (Madrid)
Spain
Phone: +34 91 69 10-054
Fax: +34 91 69 10-100
JKnorr-Bremse Rail Systems Japan Ltd.Nishiikebukuro TS Bldg., 8F
3-1-15 Nishiikebukuro
Toshima-ku
Tokyo, 171-0021
Japan
Phone: +81 3 53 91-10 13
Fax: +81 3 53 91-10 22
FFreinrail Systèmes Ferroviaires S.A.47-49 rue Gosset
BP 185
51057 Reims Cedex
France
Phone: +33 3 2679-7200
Fax: +33 3 2679-7201
HKKnorr-Bremse Asia Pacific (Holding) Ltd.Suite 2901, 29/Fl Central Plaza
18 Harbour Road
Wanchai
Hong Kong
China
Phone: +852 2861-2669
Fax: +852 2520-6000
IFrensistemi S.r.l.Via della Cupola, 112
50145 FLorence
Italy
Phone: +39 055 3020-1
Fax: +39 055 3020-333
ROKKnorr-Bremse Rail Systems Korea Ltd.6th Floor, Bongwoo Bldg.
31-7, 1 Ka, Changchung-Dong, Choong-Ku
Seoul 100-391
Korea
Phone: +82 2 22 80-55 55
Fax: +82 2 22 80-55 99
SKnorr-Bremse Nordic Rail Services ABTraktorvägen 8
226 60 Lund
Sweden
Phone: +46 46 3293-50
Fax: +46 46 1489-71
AUSKnorr-Bremse Australia Pty. Ltd.1/2D Factory Street
Granville NSW 2142
Australia
Phone: +61 2 8863-6500
Fax: +61 2 9897-998001/07
Systeme für Schienenfahrzeuge GmbH
Moosacher Str. 80 · 80809 München · Germany · Phone +49 89 3547-0
Fax +49 89 3547-2767 · Homepage http://www.knorr-bremse.com Printed in Germany.
