Dual purpose suction and blowing marine fan

Marine fans are widely used, with a wide variety of types and complex models. Standardization and serialization of products are crucial. After investigating the usage of more than ten ship fans and some foreign standards, the first batch of standard parameters for ship fans in China were compiled in 1960, namely: Basic Parameters of Centrifugal Ventilators (CBl04-60); Basic parameters of boiler blower (CBl05-60): Basic parameters of axial flow fan (CB213-60). But these standards have not been implemented and no series of products have been produced. In 1963, the 704th Research Institute of the Sixth Ministry of Machine Building and the General Machinery Research Institute of the First Ministry of Machine Building jointly led the development of new standards.