Before revision: CW pumps are deigned as per IS:9137,IS 9137 (1978): Code for acceptance test for centrifugal,mixed flow and axial pumps - Class C [MED 20: Mechanical URL standards of the Hydraulic Institute, USA or equivalent.
After revision: CW pumps are designed as per IS:9137,IS 9137 (1978): Code for acceptance test for centrifugal,mixed flow and axial pumps - Class C [MED 20: Mechanical URL standards of the Hydraulic Institute, USA or equivalent.