Paresh Engineering Co. Offers Drum Blender System. The Drum Blender system has been designed as an integral cycle system from formulation to utilization. Paresh Engineering Co. Is an ISO 9001:2000 approved company by DNV. The Drum Blender System is used for mixing and batch identification of the product during intermediate steps inside the same hermetically sealed container. This system is environmental friendly. The Drum Blender System consists of a fabricated MS Drum rotating at 20 RPM. It has an open able door in front, through which the SS Bins containing the products are loaded in the drum. After mixing, the bins are removed and the drum is recharged with another loaded bin.