Heat Exchangers and Components in Graphite and Silicon Carbide For more than 50 years GAB Neumann has designed and manufactured impervious graphite and silicon carbide heat exchangers, equipment and components for applications in the chemical, pharmaceutical, steel, coating, and environmental industries. Providing the highest quality and maintaining a strong customer focus are the foundation of our organization. This is demonstrated by the longevity of more than 20,000 pieces of equipment that have been delivered to a loyal customer base. Our staff are our key, they are highly skilled, well experienced and dedicated, ensuring the success of our products and our company. Across the world, our staff and agents develop solutions with our clients for their specific applications to optimise overall performance and cost. In addition to our products we offer the respective maintenance services. These activities include chemical cleaning services of process equipment and plants in various materials of construction of various manufacturers.