Dosing Modules – Absolute Precision Control of SCR
Bürkert supplies dosing systems and exhaust gas scrubbing components for tailored SCR systems
Selective catalytic reduction (SCR) is the key to observing the ambitious limits enforced for NOx emissions from commercial vehicles. For 15 years, Bürkert has been supplying not only valves for exhaust gas scrubbing systems for use in commercial vehicle motors but also complete (Read More)
dosing systems for large motors. At the IAA 2016 in Hanover, the fluid control experts advised on the application-specific design of SCR systems.
SCR dosing modules often contain components such as a proportional valve, a switching valve, a temperature sensor, a pressure sensor and a heating element, mounted on a vehicle-specific base unit. The key factor here is to ensure that the reaction agent can be measured reliably and with repeatable precision. It is also important for the dosing modules to be long-lasting, compact and lightweight. Bürkert acts as a single source for all of the technologies that offer these features, with not only valves, sensors and complete dosing modules but also base units made of stainless steel and plastic and systems engineering services.
Customized SCR systems not only scrub exhaust gases, but can also optimize the performance and efficiency of trucks, buses, construction, mining and agricultural machinery, because the diesel units of these can be operated without negatively impacting upon the environment at the ideal operating points. So that they can reliably perform their duties, they must be highly resistant to heat and the effects of chemicals, and be absolutely leaktight. This is why Bürkert’s electromagnetic shut-off and control valves have specially cast coils that are produced in-house. Bürkert’s engineers integrate them into the dosing units in accordance with the given application for a variety of power classes, enabling them to be optimally scaled in a cost-effective fashion with few interfaces. Dosing modules increase integrity and reduce the work involved in installation and testing.
Bürkert’s system components, customized for the special operating conditions, allow the reducing agent to be precisely dosed. Type 200 switching valves and type 2861 proportional valves are usually at the heart of these well-established dosing devices with the standard flow ranges. The direct-acting solenoid valves control the reducing agent and the compressed air. The materials used for the housing and seal, the degree of protection and the special-purpose electrical connections can all be customized. The long-lasting, well-developed valve technology, combined with the fluid control and production expertise of Bürkert, ensure that the SCR systems process gases and liquids such as ammonia and urea solutions reliably with precision dosing throughout the commercial vehicle’s life.
About BÜRKERT
Bürkert Fluid Control Systems is one of the world’s leading manufacturers of measuring, control and regulating systems for liquids and gases. Bürkert products are used in a wide range of industries and applications – ranging from breweries and labs to medical, bio-engineering and aerospace technology. With a portfolio of more than 30,000 products, Bürkert is the only supplier to offer all fluid control system components, from solenoid valves to process and analytical valves, from pneumatic actuators to sensors.
With its headquarters in Ingelfingen in southern Germany, the company has a wide-ranging sales network in 36 countries and more than 2,500 employees worldwide. Bürkert continuously develops customized solutions and innovative products at its five Systemhaus locations in Germany, China, and the USA, and in four research centers. The product range is supplemented by BürkertPlus, the comprehensive service that supports customers throughout the entire product life cycle.
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