NTK EGR Valves-Reducing emissions, meeting highest standards

Avoid hard NOx

EGR valves are widely used in today’s diesel engines and in a growing number of petrol engines. Designed to help reduce NOx emissions and support engine protection , NTK EGR valves are rigorously tested against demanding technical and performance requirements.

100% of diesel engines in Europe are fitted with an EGR valve

Supports NOx emissions reduction within vehicle emissions control systems

60% market coverage – and growing

Comprehensive technical support

EGR Valves Types

There are three basic types of EGR valves. Pneumatic EGR valves have a vacuum controlled diaphragm. These valves can enable a higher flow rate that is required by newer diesel applications. Electric EGR valves are controlled through integrated electronics. These valves are run directly by the engine’s control unit and can be much more precisely regulated. And then there are electric EGR valves that have a cooling unit to further reduce the temperature of the exhaust gases.

EGR valves are developed in line with Niterra’s established quality requirements. All our valve types have undergone and passed testing carried out in extreme conditions. This includes thermal shock testing in temperatures ranging from -40°C to 150°C, tests on valve, cavity and cooling leakage, as well as electrical resistance and lifecycle.

One exhaust gas recirculation product on a rubber drawer in a garage

How do EGR Valves work?

Nitrogen oxides (NOx) are produced during the combustion process. NOx is created when high combustion temperatures enable the nitrogen and oxygen present in the air-fuel mixture to combine. To reduce these harmful emissions the EGR valve takes exhaust gases from the exhaust manifold and reintroduces them into the intake manifold, mixing them with fresh air. This has a double effect, reducing the amount of oxygen in the air-fuel mixture and reducing the temperature, and thereby reducing the amount of NOx the engine produces.

Achieving the “right” level of return gas is governed by the Engine Management System (EMS) which measures various inputs e.g. engine load, engine speed, boost pressure, mass air flow rate, intake air temperature.

The Engine Management System (EMS) calculates the desired EGR return rate. (Diesel max. 30% and petrol up to 18%)
The EGR valve, whch is controlled and actuated by the ECU then returns the exact amount of exhaust gas to the intake manifold as calculated by the EMS
The result? NOx emissions are reduced