DP Series Self-Balancing Multi-Stage Centrifugal Pump 3.75-1360 m³/h Flow 46-1000m Head Industrial Water Pump

The DP series horizontal multi-stage centrifugal pumps are single-suction, multi-stage, self-balancing pumps designed as replacements for D-type horizontal multi-stage pumps. These industrial pumps feature a wide operating range, excellent cavitation performance, stable operation, minimal wearing parts, high reliability, and low maintenance costs. Models with an "S" suffix incorporate a first-stage double-suction structure for enhanced cavitation performance.

These products comply with GB/T5657 Technical Conditions for Centrifugal Pumps (III) Type, MT/T114-2005 Multi-stage Centrifugal Pumps for Coal Mines, and GB/T3216 Acceptance Tests for Rotodynamic Pumps - Grade 1, Grade 2 and Grade 3.

• DP-type: Transporting clean water without solid particles (temperature below 80°C) or liquids with similar physical/chemical properties
• DP-M type: Handling neutral mine water and similar sewage with solid particle content ≤1.5%, particle size ≤1.3mm, temperature below 80°C
• DP-F type: Transporting corrosive liquids without solid particles (temperature below 80°C) with material selection based on medium
• DP-Y type: Moving oil-based media without solid particles (temperature below 80°C, viscosity
• DP-R type: Transporting clean water without solid particles (temperature not exceeding 105°C)

• Reliable Self-Balancing Structure: Symmetrically arranged impellers cancel axial forces, eliminating need for balance disc
• Advanced Technology: New throttle pressure-reducing device reduces leakage and improves efficiency
• Enhanced Sealing: Balance structure prevents excessive pressure in mechanical seal and packing chambers
• Superior Cavitation Resistance: First-stage impeller and double-suction impeller design for high NPSH requirements
• Reliable Mechanical Seal: No axial movement of pump rotor ensures mechanical seal reliability
• Low Maintenance: Elimination of failure-prone balance disc structure reduces maintenance frequency and costs
• High Efficiency: Properly centered impellers and diffusers maintain performance without efficiency decline
• Media Versatility: Material customization enables handling of solid particles, oil, and corrosive substances

The self-balancing multi-stage centrifugal pump features two structural variants: first-stage single-suction and first-stage double-suction designs. Both configurations utilize a "one-end fixed, one-end floating" grease-lubricated bearing structure with cylindrical roller bearings at the driving end and angular contact ball bearings at the non-driving end to handle residual axial forces.