Product Description: The HF series of Seating Block for Purging Plugs and Nozzle is cast molding production of preshaping products or pressure molding machine products, with corundum – spinel, corundum, aluminum-magnesium carbonaceous material. It has a compact structure, resistant to erosion, erosion resistance, and good thermal shock resistance. It has a good protective effect on Seating Block for Purging Plugs and Nozzle.