Dfds Horizontal Multi-Stage Centrifugal Pump

Product Introduction of DP - type Pump

 Single - suction structure for the first - stage

High - efficiency and Energy - saving

The hydraulic models of the suction section, discharge section, diffuser, and impeller adopt excellent designs and are optimized through CFD. The flow - passing components are made by resin sand casting, ensuring accurate flow - passage dimensions and a smooth surface, thus improving the hydraulic efficiency of high - efficiency pumps.

For suction sections, discharge sections, and impellers of different sizes and materials, the optimal casting process is adopted to ensure accurate flow - passage dimensions and a smooth surface, minimizing hydraulic losses.

The DP pump adopts new energy - saving technologies and has been recommended as a national energy - saving and environmental - protection excellent product technology by the China Electronic Energy - Saving Technology Association.

High Reliability

• With impellers symmetrically arranged on the rotor components, the axial forces generated by the impellers counteract each other. Self - balancing of the axial force inside the pump can be achieved without the need for structures like balance discs. The residual axial force is borne by a pair of angular contact bearings. The failure - prone balance disc structure is eliminated, greatly improving reliability, reducing the number of maintenance times and maintenance costs. There is no axial movement in the pump rotor, solving the problem of poor reliability in conventional multi - stage pumps.
  • Cylindrical roller bearing
  • Forward impeller
  • Backward impeller
  • Angular contact bearing

• Good cavitation resistance: The first - stage impeller with excellent cavitation resistance (some pumps use double - suction impellers), coupled with reliable materials, enables the pump to be applied in various scenarios with high cavitation margin requirements.
  • First - stage double - suction impeller

• Adopting new energy - saving technologies, a flow - controlled pressure - reducing device is added to reduce leakage on the one hand and improve efficiency on the other. Additionally, it can play an auxiliary supporting role, enabling the pump to operate stably.
  • Short throttle sleeve
  • Long throttle sleeve

• The DP pump is reliable: Using wear - resistant materials, it can be used for mountain water drainage and transporting mine water. The MDP pump used for mine water drainage has obtained the Mine Product Safety Certificate, with a maximum certified flow rate of 1000 m³/h.
  • The seal is reliable: A balance structure is adopted to prevent excessive pressure in the packing chamber and stuffing box, extending the service life of the packing and stuffing box.
  • Balance water pipe

Product Overview

Product Applications

• DP - type: Used to transport clean water without solid particles and with a temperature below 80°C, or liquids with physical and chemical properties similar to clean water.
• DP - M type: Used to transport neutral mine water and other similar sewage with a solid particle content ≤ 1.5%, particle size ≤ 0.5mm, and temperature below 80°C.
• DP - F type: Used to transport corrosive liquids without solid particles and with a temperature below 80°C. The pump material can be reasonably selected according to the transported medium.
• DP - Y type: Used to transport oil - based media without solid particles, with a temperature below 80°C and viscosity less than 120 centistokes.

Working Range

• Flow rate range: 3.75 - 1360 m³/h
• Head range: 46 - 1000 m
• Inlet pressure: ≤ 0.6MPa
• Medium temperature: -20°C - 80°C