Advantages and Disadvantages of Horizontal Split-Casing Single-Stage Double-Suction Centrifugal Pumps

The horizontal split-casing single-stage double-suction centrifugal pump adopts an axially split structure, with both the suction and discharge ports located on the pump casing. This design allows for maintenance without disassembling the inlet/outlet pipes or the prime mover. The symmetrical arrangement of the double-suction impeller automatically balances axial forces, resulting in a simple structure. It is widely used in modern urban water supply and drainage, power plants, industrial process systems for water intake and pressurization, agricultural irrigation and drainage, various hydraulic engineering projects, and petrochemical applications. While horizontal split-casing single-stage double-suction centrifugal pumps offer several advantages, they also have some disadvantages. With ongoing technological advancements, these drawbacks are expected to be gradually mitigated, enabling these pumps to play an even greater role.

Advantages of Horizontal Split-Casing Single-Stage Double-Suction Centrifugal Pumps:
As a type of centrifugal pump, the horizontal split-casing single-stage double-suction centrifugal pump features two back-to-back impellers combined into one unit. The water flow discharged from the impellers converges into a single volute, offering benefits such as excellent force balance, high head, large flow capacity, smooth operation, and resistance to cavitation. These pumps are widely used in industrial production and various engineering applications. Maintenance is relatively convenient due to the split-casing design. Their stable operation stems from the symmetrical impeller structure, which eliminates axial forces. At the same speed and flow rate, the reduced inlet velocity minimizes the risk of cavitation.

Disadvantages of Horizontal Split-Casing Single-Stage Double-Suction Centrifugal Pumps:
Despite their advantages, these pumps also have certain drawbacks. Although they exhibit low net positive suction head required (NPSHr), this affects their operational efficiency—lower NPSHr often correlates with lower efficiency. Additionally, leakage is more likely to occur at the wear rings, which can disrupt normal operation and further reduce efficiency.

CME Horizontal Split-Casing Single-Stage Double-Suction Centrifugal Pumps
CME's horizontal split-casing single-stage double-suction centrifugal pumps utilize high-precision hydraulic models and wear-resistant materials, achieving energy efficiency ratios that exceed national standards by 10%. A single unit can save over 30,000 kWh annually! The full series features modular design, and the double-suction structure ensures both high flow capacity and head, making them ideal for demanding applications such as urban water supply, mine drainage, and agricultural irrigation. We welcome both new and existing customers to visit and evaluate our products!