Common metering machines for liquid components which are equipped with high-speed piston pumps cannot withstand the high abrasiveness of solid fillers long-term. Especially for processing main components containing fillers, Hennecke has therefore developed the TOPLINE HT500evo metering machine with a low-wear plunger pump which produces even under highly abrasive conditions with high precision, repeat accuracy and endurance. The TOPLINE HT500evo has an attractive price-performance ratio and is suitable for parts weighing up to three kilogrammes, with an output of 100 - 500 cm³/s. One of the main applications of this device is the production of comfort flexible foam that is, for example, used in seats and cushions for vehicles, especially in public transportation. Another area of application of the TOPLINE HT500evo are rigid foam applications, as for insulation within the framework of fire protection class B2 in the construction industry. Hennecke offers the TOPLINE HT500evo as an independent 2-component metering machine or as a module device for retrofitting an existing TOPLINE metering machine. In addition to processing polyols with solid flame retardants – for example, ammonium polyphosphate, melamine resin and expanded graphite – the efficient metering system is also particularly suitable for processing polyols made of renewable raw materials, recycled polyols, polyols with fillers such as PUR regrind or abrasive fillers such as glass fibers, calcium carbonate, barite, abrasive colour pigments and highly viscous raw material systems.