Shroff Process Pumps manufactures Impellers for Corrosive and Abrasive Slurry and Sludge. Shroff Process Pumps is an ISO 9001 2008 certified company. The Company also manufactures various types of chemical process pumps. The Impellers for Corrosive and Abrasive Slurry and Sludge is of two types open impeller and semi-open impeller. The open impeller is a series of vanes attached to a central hub for mounting on the shaft without any form of side wall or shroud. The semi-open impeller incorporates a single shroud at the back of the impeller.