Circulation Pump

Forced circulation pumps do not rely on the centrifugal force of the impeller to transport liquids; instead, they utilize the thrust of the rotating impeller blades to make the liquid flow along the pump shaft. When the pump shaft is rotated by the motor, the helical angle between the blades and the shaft axis generates thrust (or lift) on the liquid, pushing it out and discharging it through the discharge pipe. Once the liquid is pushed out, a partial vacuum is created at the original location, and the outside liquid, under atmospheric pressure, is drawn into the impeller through the inlet pipe. As long as the impeller continues to rotate, the pump can continuously draw in and discharge liquids.

1. Low operating speed, meeting the requirements of the crystallization process for stable operation.
2. Excellent hydraulic performance, with an efficiency >70%, a wide high-efficiency range, and good cavitation resistance.
3. Considering the vertical downward flow direction of the pump medium and the horizontal outflow direction, and the significant impact of the water flow force on the pump shaft, a pump shaft outer sleeve protection device is added to the pump body. This transfers the downward force of the medium to the pump body, thereby ensuring stable pump operation, greatly reducing the impact of the medium on the mechanical seal force, and extending the service life of the mechanical seal. This structural improvement represents a significant step forward compared to similar domestic products. Furthermore, the pump body is integrally cast, providing good rigidity, and the intermediate support structure is stably connected. The horizontal axial flow pump has no guide vanes.
4. The bearing housing is a square, long-span heavy-duty structure with good stability, strong load-bearing capacity, and reliable operation. Radial short cylindrical bearings and heavy-duty paired bearings are used at the front and rear ends, respectively. All bearings are NSK (SKF).
5. The shaft seal features advanced technology, employing a combination of a secondary impeller dynamic seal and a Burgmann quick-release double-end mechanical seal, along with external cooling and flushing water to improve working conditions and extend seal life. The shaft sleeve has an enlarged outer diameter and, compared to similar domestic products, a thicker wall resulting in less deformation.