CENTRIFUGAL PUMP

摘要

A centrifugal pump includes at least one impeller ( 11 ) fixed to a main shaft ( 10 ) and at least one casing which houses the impeller and is formed through press working of sheet metal such as a steel plate. The centrifugal pump further includes a casing cover configured to seal an open end of the casing hermetically, and a shaft seal device ( 12 ) provided at a portion where the main shaft passes through the casing cover. The casing cover has a thick member ( 6 ) made of castings, and a thin corrosion-resistant lining member ( 40 ) which is tightly fixed to the thick member.