894249 Stand 09/12 Druck 09/12 www.wolf-corporate.deCleaner environment throughpure exhaust gases

Bürkert Fluid Control Systems
Christian-Bürkert-Straße 13-17
74653 Ingelfingen
Deutschland
Tel.: +49 (0) 7940/10-0
Fax: +49 (0) 7940/10-91 204
info@buerkert.dewww.buerkert.de

Valves and dosing modules for SCR - Selective Catalytic
Reduction - of NOx exhaust gases from diesel enginesCleaner environment
Bürkert’s contribution
throughpure
gases
for thecleanexhaust
use ofdiesel engines
Diesel aggregates have revolutionised the world and at the end of the 20th
were made even more efﬁcient. Today diesel engines are used in many
areas. Whether in the air or on water, passenger car or ship, stationary for
power generation or for propulsion of vehicles. The diesel engine shows
its advantages in a wide variety of situations.
However, with the increasing number of diesel engines the emission values increase drastically. The nitrogen oxides that occur in the combustionof diesel fuel represent problems for our environment that are as signiﬁcant as the problems associated with carbon dioxide. For example, nitrogen oxides, NO or NO2, produce high concentrations of ozone on streetswith heavy trafﬁc.
A remedy is provided by a substance that reacts with the nitrogen oxides
to form nitrogen and water - ammonia. This scientiﬁc reaction, SCR or
selective catalytic reduction, points the way to a technology that ensuresa cleaner environment. Only SCR catalytic converters reduce the nitrogenoxides to the degree now required by standards and directives. Ammonia (gaseous or liquid) is injected into the catalytic converter either in pureform as gas or in the form of a liquid urea solution (AdBlue). The higher
the concentration the better.
The SCR technology is not new, it has been used for some time in power
plants. The limit values for emissions that must be complied with in the
future now ensure that this technology will also be used in construction
machines, ships, power generators, transport vehicles and passenger
vehicles. The important fact in this regard is that ammonia can be safely
dosed with repeat accuracy. It is also important to keep dosing modules
durable, compact and light. Bürkert is your single source for all technologies that enable these characteristics: Valves and sensors as well as
plastics technology and system engineering.

Valve assembly with plastic
parts in the SCR aggregate.

2

3

Reduction of pollutantsin diesel engines
Diesel engines are powerful, reliable and efficient. Mobile commercial vehicles (on-road)such as trucks, buses, forklifts, excavators, ships, and stationary combined heat and power
stations (off-road) for example are usually powered with diesel aggregates. Exhaust aftertreatment measures that significantly reduce pollutants such as soot and nitrogen oxide
emissions, in particular, through an optimised inner-engine combustion as well as in theexhaust, have contributed in this regard.
However the statutory regulations for further reduction of NOx gases and particles, seegraphic (level IV in the off-road area and Euro 6 in the on-road area), can only be achieved
through additional emission reduction systems, uncoupled from engine operation. In thiscase, low-emission engines no longer conflict with general fuel savings.
Components, such as valves, sensors, or complete dosing modules in emission reduction
systems with SCR technology, require a higher level of material resistance chemically andthermally, and a high level of physical leak tightness. Consequently, electromagnetic
shut-off and control valves from Bürkert use specially encapsulated coils manufactured
in-house. Bürkert engineers integrate these coils in dosing units of different capacity
classes in a manner appropriate for the application. This guarantees an optimised, costefficient overall size, in addition to a significantly reduced variety of interfaces. Dosing
modules increase the integrity and reduce installation and test complexity.

On-Road vs Off-Road
Nitric oxide
NOX (g/kWh)Level II
6.0 / 0.20

Level IIIA
4.0 / 0.20

Level IIIB Level IV
2.0 / 0.025 0,4 / 0.025

Particulate mass
PM (g/kWh)

10.0

0.50

8.0

0.40

6.0

0.30

4.0

0.20

2.0

0.10

0
0

92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17

0
0

2.0

0.10

4.0

0.20

6.0

0.30

8.0

0.40

10.0

0.50

EURO I
8.0 / 0.36
NOX (g/kWh)

4

Level I
9.2 / 0.54

EURO II
7.0 / 0.15

EURO III
5.0 / 0.10

EURO IV EURO V
3.5 / 0.02 2.0 / 0.02

EURO VI
0.4 / 0.01
PM (g/kWh)

Jaussi / Liebherr, VDI conference for aftertreatment of exhaust gases in 2010

5

Mass ﬂow controllers
for air and ammonia

36Integrated ﬂow
measurement
unit for gases

Compressed
air supply

2

Nitrogen oxides(NOX )

DosingmoduleAmmonia (NH3 ),pure or solvedin a liquid

Elektronics

Nitrogen (N2 )Water (H2O)

Measurement ofpressure, temperatureand ﬂow for liquids

Electrical shut-off
and safety valves

1

System technology

Control valves fordosing tasks

Fluid components for dosing
gases and liquids

4

Tank

5

6

7

Fluid components for dosing
gases and liquids
Electrical shut-off and safety valves

1

Dosing modules for gaseous ammonia or liquid urea, from which the ammonia for NOx is obtained,
require fast-switching electric valve technology. The task of the valve technology is to control thereactants (ammonia or urea), as well as the neutral nitrogen or compressed air that is used either for
purging or conveying purposes. Use of two-way or three-way valves in flange versions enable a compact
structure of the dosing unit. In addition to the technical control tasks, so-called solenoid valves switch
off the reaction agents quickly and reliably, should this be required for safety reasons or as part of thedosing strategy. Specially qualified sealing materials ensure lasting and reliable leak tightness. Mediumseparated solenoid valves enable an even longer service life. In this regard the valve’s actuator is not in
contact with the medium.

Valve seatDe-energised

Energised

Control valves for dosing tasks
The dosing strategy can be efficiently implemented with solenoid control valves that have an incomparably high control range (as much as 200:1). These valves have a lot to offer in a simple manner,consequently the costs remain minimal. Through PWM activation of the coil a moderate magnetic force
is adjusted so that this force, counter to the return spring force, holds the plunger that activates the valve
in a certain position. Friction-free guidance of the plunger is extremely important. The nominal diameterof the seat can be as small as 0.05 mm or as large as 8 mm. A sealing element is integrated in theplunger that acts on the valve seat. This means that such valves can also take over a shut-off function.
Such valves can compensate for the non-linearity of the injectors, when they are used as control valves
for the forced air. Variants that are resistant to ammonia and urea are also available.

Conical stopper2
Conical stopper geometry(solenoid control valve)

Mass ﬂow controllers (MFC) for air and ammonia

3

Set pointsettingw

Controlelectronics Control valve signal
yxd = w-x

Actual value
feedback

Actual valuex
Pipe inlet

Pipe outlet
Flow sensor

8

xout

Temperature-independent and gas pressure independent mass flow control of gases, such as airor ammonia, with a control range greater than 50:1 (2-100%) requires a reliable, precise and alsochemically resistant sensor system with a long service life, as well as precise control valves. MFCs withthermal flow sensors, solenoid control valves and a sophisticated flow mechanism form a control loop
and are outstanding at handling the task. These devices receive a flow setpoint, controls it and signal
back an actual flow value, with analogue or digital signal technology. They are calibrated to the required
full scale value and the desired flow unit (mass or volume).

Solenoid
control valve

9Fluid components for dosing
gases and liquids
Integrated ﬂow measurement unit for gases
For the flow measurement, also of the gaseous ammonia, sensors are qualified in accordance with thethermal flow measurement, but also differential pressure principle. The thermal flow sensors offer an
outstanding price/performance ratio, they are compact and ideally can be integrated in dosing modules.
Due to its MFC portfolio, Bürkert has the required flow mechanics competence that ensures that thefluid-engineering efforts can be kept at a minimum. The sensors available for the dosing modules offer
a high span, short response time, and the possibility of temperature compensation. These sensors
are integrated exclusively in customer-specific Bürkert systems. The measuring span for differential
pressure sensors is significantly smaller than it is for thermal flow sensors. By detecting the differential
pressure via an orifice, the flow rate can be determined.

4

Measurement of pressure, temperature and ﬂow (liquid)
Fluidical dosing modules in SCR systems contain pressure sensors and temperature sensors. For
example, the pressure monitoring indicates a required minimum pressure of the ammonia gas. If thetemperature is also detected, then it can be ensured with certainty that gaseous ammonia is present, as
required. In the gaseous state the materials of system components are subject to less stress. For liquidurea, temperature detection ensures that the system is above freezing. If the air pressure in AdBlue
systems is right, then the suction mechanism of the injector is ensured. If AdBlue is conveyed out of
the tank, via a pump, flow sensors detect the flow rate and thus enable the required dosing in the SCR
catalytic converter, appropriate to the engine strategy. Moreover, as is the case for gaseous media, thedifferential pressure measurement technology is also available.

5

System technology
In addition to development of standard products, such as MFCs (Mass Flow Controllers) customers profit
from Bürkert’s system solutions that are developed on a customer-specific basis. The valve repertoire
and product portfolio is the basis for customer-specific system solutions. Thus customers profit fromcomplete assemblies that are tailored to the application-specific task. In a system development all specificrequirements are taken into consideration, whether vibration resistance, temperature range, reliable flow
measurement, selection of materials, plastic design or other requirements.

Mass flow
meter (Air)Air

Electrical
shut-off valve

6

Check valve

Pump

Mass flow
Electricalcontrol loop control valve

Nozzle

Tank

10

11

Welcome to the Fascinating
World of Fluid Control Systems
Measurement and control: When it comes to working with liquids and gases, we are at your side − as a manufacturer ofsophisticated products, as a problem-solver with an eye for the big picture, and as a partner offering you reliable advice.
Since we started in 1946, we have developed into one of the world’s leading suppliers of Fluid Control Systems. At thesame time we have kept our status as a family-owned business with a foundation of strong basic values to highlight theway we think and act.

EXPERIENCE
There are things which are not inherently yours. You have to gather them bit by bit. You receive them from others. And
you constantly have to acquire them anew. That is what makes them so valuable. Experience is one of those things.
For instance, because of our many years of experience with metering, controlling and analysing of fluids, we can provide our extensive services to you − from consulting, development, and 3D CAD simulating to testing and after-sales
service. Whether individual product solutions or a pioneering new system for the entire control process: Benefit fromour experience!

COURAGE
Those who only work toward optimizing things that already exist will eventually reach the limits − technically, financially, or personally. In order to overcome these limits, courage is needed: The courage to be different and trust one’s own
ideas; the courage to venture into the unknown, searching for new ways to develop products that have never existed
before. We have this courage. By pooling and utilizing our competencies across all sectors, you benefit from our cumulative knowledge in metering of fluids – whether it is in water treatment, cooling or hygienic processing applications.

CLOSENESS
There are things we simply take for granted. Only when they are gone, do we realize how important these things really
were. This applies in particular to closeness. Without closeness, it is very difficult to build relationships and a goodunderstanding of one another. As an established medium-sized company, we know that. And that is why we are always
there for you. Working with you, we develop the best possible solutions for your projects. Our global presence in 35
locations enables us to press ahead with sensor innovations for our customers around the world.

12

13

Bürkert – Close to You

Austria

Bürkert-Contromatic G.m.b.H.
Diefenbachgasse 1-3
AT-1150 Wien
Tel: +43 (0)1-894 13 33
Fax: +43 (0)1-894 13 00
E-mail: info@buerkert.at

Belgium

Bürkert Contromatic BV
Minervum 7220
NL-4817 ZJ Breda / Netherlands
Tel: +32 (0) 3 325 89 00
Fax: +32 (0) 3 325 61 61
E-mail: info@burkert.nl

Czech Rep.

Bürkert-Contromatic G.m.b.H. organizacni
slozkaKrenova 35
CZ-602 00 Brno
Tel: +420 543-25 25 05
Fax: +420 543-25 25 06
E-mail: obchod@burkert.cz

Denmark

Bürkert-Contromatic A/SHørkær 24
DK-2730 Herlev
Tel: +45 44-50 75 00
Fax: +45 44-50 75 75
E-mail: info.dk@burkert.com

FinlandBürkert Oy
Atomitie 5
FI-00370 Helsinki
Tel: +358 (0)207 412 550
Fax: +358 (0)207 412 555
E-mail: sales.fi@burkert.com

FranceBURKERT CONTROMATIC SAS
Rue du Giessen
FR-67220 Triembach au Val
Tel: +33 (0)388-58 91 11
Fax: +33 (0)388-57 20 08
E-mail: burkert.france@burkert.com

Germany

Ingelfingen – Sales Center
Bürkert GmbH & Co. KG
Christian-Bürkert-Straße 13-17
DE-74653 IngelfingenTel: +49 (0)7940/10-91 111
Fax: +49 (0)7940/10-91 448
E-mail: info@buerkert.de
BerlinBürkert GmbH & Co. KG
Paradiesstraße 206 b
DE-12526 Berlin
Tel: +49 (0)30/679717-0
Fax: +49 (0)30/679717-66
Hannover
Bürkert GmbH & Co. KG
Rendsburger Straße 18
DE-30659 HannoverTel: +49 (0)511/90276-0
Fax: +49 (0)511/90276-66

14

Europe, continued
DortmundBürkert GmbH & Co. KG
Holzener Straße 70
DE-58708 Menden
Tel: +49 (0)2373/9681-0
Fax: +49 (0)2373/9681-50
Frankfurt
Bürkert GmbH & Co. KG
Am Flugplatz 27
DE-63329 Egelsbach
Tel: +49 (0)6103/9414-0
Fax: +49 (0)6103/9414-66
Stuttgart
Bürkert GmbH & Co. KG
Ulmer Straße 4DE-70771 Leinfelden-EchterdingenTel: +49 (0)711/45110-0
Fax: +49 (0)711/45110-66
München
Bürkert GmbH & Co. KG
Elsenheimerstraße 47
DE-80687 München
Tel: +49 (0)89/829228-0
Fax: +49 (0)89/829228-50

Italy

Bürkert Contromatic Italiana S.p.A.
Centro Direzionale „Colombirolo“
Via Roma, 74
IT-20060 Cassina De’ Pecchi (Mi)Tel: +39 02-959 071
Fax: +39 02-959 07 251
E-mail: info@buerkert.it

Netherlands

Bürkert Contromatic BV
Minervum 7220
NL-4817 ZJ Breda
Tel: +31 (0) 88 12 67 300
Fax: +31 (0) 88 12 67 350
E-mail: info@burkert.nl

NorwayBürkert-Contromatic A/S
Hvamstubben 17
NO-2013 Skjetten
Tel: +47 63-84 44 10
Fax: +47 63-84 44 55
E-mail: info@burkert.no

PolandBurkert-Contromatic GmbH Oddzial w Polsce
Bernardynska street 14 a
PL-02-904 Warszawa
Tel: +48 (0)22-840 60 10
Fax: +48 (0)22-840 60 11
E-mail: buerkert@buerkert.pl

Portugal

Tel: +351 212 898 275
Fax: +351 212 898 276
E-mail: portugal@burkert.com

Spain

Bürkert Contromatic S.A.
Avda. Barcelona, 40
ES-08970 Sant Joan Despi, Barcelona
Tel: +34 93-477 79 80
Fax: +34 93-477 79 81
E-mail: spain@burkert.com

Europe, continued

Asia

Asia, continued

Sweden

China

Japan

Bürkert-Contromatic AB
Kattsundsgatan 27
SE-211 26 Malmö
Tel: +46 (0)40-664 51 00
Fax: +46 (0)40-664 51 01
E-mail: info.se@burkert.com

Switzerland

Bürkert-Contromatic AG Schweiz
Bösch 71
CH-6331 Hünenberg ZG
Tel: +41 (0)41-785 66 66
Fax: +41 (0)41-785 66 33
E-mail: info.ch@burkert.com

TurkeyBurkert Contromatic Akiskan Kontrol
Sistemleri Ticaret A.S.
1203/8 Sok. No2-E
TR-Yenisehir, Izmir
Tel: +90 (0)232-459 53 95
Fax: +90 (0)232-459 76 94
E-mail: infoturkey@burkert.com

United Kingdom

Burkert Contromatic Limited
Brimscombe Port Business Park
Brimscombe, Stroud
Glos, GL5 2QQ / UNITED KINGDOM
Tel: +44 (0)1453-731 353
Fax: +44 (0)1453-731 343
E-mail: sales.uk@burkert.com

AfricaSouth Africa

Bürkert Contromatic (Proprietary) Limited
233 Albert Amon Road
Millennium Business Park
Meadowdale,
Germiston(Postal: P.O. Box 26260, East Rand 1462)
SOUTH AFRICA
Tel: +27 (0)11-574 60 00
Fax: +27 (0)11-454 14 77
E-mail: sales.za@burkert.com

Middle East
Bürkert-Contromatic AG,
International Middle East (RAKFTZ Branch)
PO Box 17015, RAK Free Trade Zone
Ras Al Khaimah
United Arab Emirates
Tel: +971 7207 6696
Fax: +971 7207 6695
E-mail: sales@burkert.com

Burkert Contromatic (Suzhou) Co. Ltd.
Systemhaus
Building No. 5, No.128 Fangzhou Road
SIP Suzhou P.R. CHINA, 215024
Tel: +86 0512 6265 9230
Fax: +86 0512 6265 9773
Burkert Contromatic (Shanghai), Co., Ltd.
(logistic and warehouse for BC China)
Floor 2, block 6, 166 Mingdong Road
Pudong New District
Shanghai 201209, P.R. CHINA
Tel: +86 21-5863 9990
Fax: +86 21-5863 9968
E-mail: info.chn@burkert.com
Beijing
Burkert Contromatic (Shanghai), Co., Ltd.
Room A 1708, Luowa Building, No.203
Er Qu Lizezhongyuan, Wangjing,
Chaoyang District
Beijing P.R. China, 100102
Tel: +86 10 6439 9783, 6439 9793
Fax: +86 10 6439 9612
ChengduBurkert Contromatic (Shanghai), Co., Ltd.
B zone, 2nd floor,
DongFangGuangYi office building
33, Hua Tai RoadLongTan city industrial zone, 2nd section,
East 3rd ring Rd.
Chengdu, China 610051
Tel: +86 28 8425 1434, 8425 1435
Fax: +86 28 8425 1560
Guangzhou
Burkert Contromatic (Shanghai), Co., Ltd.
4F-1, Block B, No.1 Innovation Building
No.63 Chuang Qi Road
Shilou Town, Panyu District			
Guangzhou P.R. CHINA, 511447
Tel: +86 20 3927 0268, 3927 0260
Fax: +86 20 3927 0269
Shanghai
Burkert Contromatic (Shanghai), Co., Ltd.
Room 501/502 Xin Gai Nian Mansion
No.39 Wu Zhong Road
Shanghai P.R. China, 200233
Tel: +86 21 6486 5110
Fax: +86 21 6487 4815
SuzhouBurkert Contromatic (Shanghai), Co., Ltd.
Unit 11-12, 5th Floor, Block A
No.5 Xinghan Street
SIP Suzhou P.R. China, 215021
Tel: +86-512-6265 9881
Fax: +86-512-6265 9882

Hong Kong

Burkert Contromatic (China/HK) Limited
Unit K, 9/Floor, Kwai Shun Industrial Centre
No. 51-63 Container Port Road
Kwai Chung, N.T., HONG KONG
Tel: +852 2480 1202
Fax: +852 2418 1945
E-mail: info.hkg@burkert.com

India

Burkert Contromatic PVT Ltd
No M6, Dr Vikram Sarabhai Instronic (VSI) Estate,
Type II, Thiruvanmyur
Chennai 600 041, India
Tel: +91 (0)44-2454 0100
Fax: +91 (0)44-2454 0099
E-mail: sales.in@burkert.com

For up-to-date addresses please visit us atwww.burkert.com.

Burkert Ltd.
1-12-15, Suidou, Bunkyo-ku
Tokyo 112-0005, Japan
Tel: +81 (0)3-5804-5020
Fax: +81 (0)3-5804-5021
E-mail: info.jpn@burkert.com

Korea

Burkert Contromatic Korea Co., Ltd.
C-401, Micro Office Bldg. 554-2
Gasan-Dong, Keumcheon-Gu
Seoul 153-803, Korea
Tel: +82 (0)2-3462 5592
Fax: +82 (0)2-3462 5594
E-mail: info.kor@burkert.com

Malaysia

Burkert Contromatic Singapore Pte Ltd
2F-1, Tingkat Kenari 6
Sungai Ara
11960 Penang, MALAYSIA
Tel: +60 (0)4-643 5008
Fax: +60 (0)4-643 7010
E-mail: info.sin@burkert.com

Philippines

Burkert Contromatic Philippines, Inc.
8467 West Service Road, Km. 14, Sunvalley
South Superhighway, Parañaque City, 1700
Metro Manila, PHILIPPINES
Tel: +63 (0)2-7766071 / 7764384
Fax: +63 (0)2-7764382
E-mail: info.rp@burkert.com

Singapore

Burkert Contromatic Singapore Pte Ltd
51 Ubi Avenue 1, #03-14
Paya Ubi Industrial Park
Singapore 408933, SINGAPORE
Tel: +65 6844 2233
Fax: +65 6844 3532
E-mail: info.sin@burkert.com

TaiwanBurkert Contromatic Taiwan Ltd.
9 F, No. 32, Chenggong Road, Sec. 1,
Nangang District
Taipei, TAIWAN 115, R.O.C.
Tel: +886 (0)2-2653 7868
Fax: +886 (0)2-2653 7968
E-mail: info.rc@burkert.com

Pacific
Australia

Bürkert Contromatic Australia Pty Ltd
Tel: 1300 888 868
Fax: 1300 888 076
E-mail: sales.au@burkert.com
Bürkert Sydney
15 Columbia Way
Norwest Business Park
Baulkham Hills NSW 2153
Bürkert Melbourne
Suite 49, UniPark
Building 4, 195 Wellington Road
Clayton VIC 3168
Bürkert Brisbane
Unit 1, 88 Brandl Street
Brisbane Technology Park
Eight Mile Plains QLD 4113
Bürkert Perth
Unit 8, 1st Floor
85 Reid Promenade
Joondalup WA 6027

Pacific, continued
South Australia
Innovation HouseFirst Avenue
Mawson Lakes SA 5095

New Zealand

Bürkert Contromatic New Zealand Ltd
Tel: 0800 BURKERTFax: 0800 33 33 77
E-mail: sales.nz@burkert.com
Bürkert Auckland
44 Rennie Drive
Airport Oaks, Auckland 2022

NAFTA
CanadaBurlington Headquarters
Bürkert Contromatic Inc.
5002 South Service Road
Burlington, Ontario L7L 5Y7, CANADA
Tel: +1 905-632 30 33
Fax: +1 905-632 38 33
E-mail: sales.ca@burkert.com
Montreal Sales Center
Bürkert Contromatic Inc.
8104 Trans Canada Highway
St. Laurent, Quebec H4S 1M5 , CANADA
Tel: +1 514-336 9033
Fax: +1 514-336 9034

USACharlotte Headquarters
Burkert Contromatic Corp.
2915 Whitehall Park Drive, Suite 650
Charlotte, NC 28273 , USA
Tel: +1 800-325 1405
Fax: +1 949-223 3198
E-mail: marketing-usa@burkert.com
West Coast Sales Facility
2572 White Road
Irvine, CA 92614 , USA
Tel: +1 800-325 1405
Fax: +1 949-223 3198
Charlotte Systemhaus
2915 Whitehall Park Drive, Suite 100
Charlotte, NC 28273 , USA
Tel: +1 800-325 1405
Fax: +1 949-223 3198
Engineering Division2915 Whitehall Park Drive, Suite 200
Charlotte, NC 28273 , USA
Tel: +1 800-325 1405
Fax: +1 949-223 3198

Latin America
Argentina

Bürkert-Contromatic Argentina S.A.
Uruguay 2602, Centro Uruguay Norte,
P.B. Oficina 1, (B1643EKP) Beccar,
Pcia. de Buenos Aires, ARGENTINA
Tel: +54 (0)11-5648-6350
Fax: +54 (0)11-5648-6355
E-mail: contacto.argentina@burkert.com

BrazilBürkert-Contromatic Brasil Ltda.
Rua Américo Brasiliense, 2069
Chacara Santo Antônio
04715-005 São Paulo - SP BRAZIL
Tel: +55 (0)11-2186 1155
Fax: +55 (0)11-2186 1165
E-mail: pedidos.brasil@burkert.com

Credits: © and concept: Christian Bürkert GmbH & Co. KG | Realization: WOLF, Berlin | Photography: Münch Lichtbildnerei, Stuttgart; Studio Flamisch, Düsseldorf |3D-Drawings: 3D Sales Technologies GmbH. All people shown are employees at Bürkert. Thank you for your support (and spirit).

Europe15