Advanced technology: High Grade from Mankenberg   At Mankenberg we offer our customers the appropriate advanced technology for all applications: large production runs, small batch production, individually tailored custom-made solutions and a wide range of materials. For many years our main product line has proved exceptionally successful: the comprehensive High Grade which is unique in the world. This range of deep-drawn stainless steel control valves covers all conceivable applications. Compared with conventional products, the High Grade convinces through its practical benefits and perfect design: Top quality surface finish Extreme resistance to corrosion Easy maintenance Light weight Optimum value for money