What do the different models of this pump represent?
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150*80DF6M, (bearing 75/7312BDB, what does this BDB stand for?)
The model number 150*80DF6M of this pump indicates that its inlet and outlet diameters are 150 millimeters and 80 millimeters respectively. DF stands for double-suction centrifugal pump, 6 denotes that the impeller diameter of the pump is 6 inches, and M indicates that the impeller material is a corrosion-resistant alloy. In the bearing 75/7312BDB, 75 indicates that the inner diameter of the bearing is 75 millimeters, while 7312 denotes that the outer dimensions of the bearing are 130×31 millimeters. BDB is the model number of the bearing; it represents a type of Angular Contact Ball Bearing. 3334098 could be the product’s serial number or batch number, among other information. .
The BDB bearing is a suffix code for the 7300 series; it is commonly indicated on Japanese bearings, and Ebara is a Japanese company that produces such bearings, which come with matching thrust components. Next, I’ll look for the official statement.
The first B represents the contact angle. For the rest, check the red line.
The nameplate surely states it’s a boiler feed water pump, right?