Roto Pumps Ltd. Is the manufacture ofMulti-Purpose Progressive Cavity Pumps. Roto Pumps Ltd. Is an ISO 9001-2000 certified company. The Multi-Purpose Progressive Cavity Pumps are pumps of simple design that requires less maintenance effort, less skill and tools for repair, making it suitable for use in various industries. The Multi-Purpose Progressive Cavity Pumps either made of Cast Iron [size 41 & 51] or U.V. Resistant Acetal-co-polymer [size 11 & 31], has suction lift capability as high as 7 meters can push fluid up to head of 30 meters.