DG45-80 boiler feed water pump
Description
- DG45-80 boiler feed water pump is a horizontal single-suction multi-stage centrifugal pump, used to transport clean
water and liquids with physical and chemical properties similar to water, suitable for medium and low pressure boiler
feed water, and also suitable for high pressure water supply and drainage in factories or cities. The temperature of the
conveying medium is -20°C ~ 150°C, and the inlet allowable pressure is less than 0.6MPA. Due to the advantages
of safe and stable operation, low noise, long life and easy installation and maintenance, it is widely used by power plant
steel mills.

DG45-80 boiler feed pump structure description
- The main parts of the medium and low pressure feed pump (lift 50-684m) are generally made of high-quality cast iron,
and the secondary high pressure feed pump (lift 409-1450m) is made of cast steel or stainless steel.
- The pump casing part is mainly connected by a bearing body, a front section, a middle section, a rear section, a guide
vane, etc., and the center line of the suction port of the front section is perpendicular to the horizontal or horizontal. The
midline spit out in the rear section is perpendicular to the horizontal, and may also be horizontal.
- The rotor part is mainly composed of the shaft and the impeller, shaft sleeve, balance plate and other parts installed on
the shaft. The parts on the shaft are fastened with flat keys and sleeve nuts to make them integrated with the shaft. The
whole rotor is supported on the pump casing by bearings at both ends, and the impeller in the rotor part is determined
according to the number of pump stages. The rotor is driven by the motor. From the motor end, the pump rotates clockwise.
- This type of pump uses rolling bearings, which are not subject to axial forces depending on the model. The pump should
allow the rotor to move axially in the pump housing during operation. Radial ball bearings cannot be used. The bearing is
lubricated with calcium-based butter.
- The front, middle, and rear sections of the pump are sealed with molybdenum disulfide grease. The rotor parts and the
fixed part are sealed by seal rings, guide vane sleeves, packing, etc. When the seal ring and guide vane sleeve are worn
It should be replaced in time if it has affected the operation and performance of the pump.
- This pump adopts packing seal or mechanical seal. Generally, it is better to use mechanical seal when the temperature
exceeds 90 degrees. When using it, the position of the packing and the mechanical seal must be properly secured. The
tightness of the packing and the mechanical seal must be appropriate. It is better to go out.