Shroff Process Pumps offers Self Priming Pump with Semi - Open Non Clog Impeller. Shroff Process Pumps is an ISO 9001 2008 accredited company. The Company also manufactures various types of chemical process pumps. The Self Priming Pump with Semi - Open Non Clog Impeller is suitable for ETP. The Self Priming Pump with Semi - Open Non Clog Impeller has back pullout and compact design. This Self Priming Pump has perfect self priming action.