... Hardness more than 52 The new product FD series “double vertical ring-die pellet mill”, Research,Design,Produced by ourselves,With ... generation gearbox,Driving with high-precision gears,Auto-matic Lubricant pump system keep the gearbox working stability and warranty periodVertical ... ,Increase press rate then increase capacity,Ring-die is “vertical double-deck”structure,It can use one mould with same ...