What is the function of a split-case pump?

2025-08-22

Split-case pump, as an important device widely used in industrial, agricultural, municipal water supply and drainage systems, stands out among many pump products due to its unique structure and efficient performance. Sanchang Pump Industry will provide a detailed explanation of the basic structure, working principle, application fields, and specific roles of the split-case pump in different systems.

1. Basic Structure of the Split-case Pump

As the name suggests, the split-case pump has a pump casing that is horizontally split along the axis. This design facilitates installation and maintenance, especially when internal parts need repair or replacement, without dismantling the entire pump body, greatly improving work efficiency. The split-case pump mainly consists of the pump casing, impeller, shaft, bearings, and sealing devices. The pump casing is divided into upper and lower halves connected by flanges; the impeller is mounted on the shaft and rotates with it; the shaft is supported by bearings to ensure smooth operation; the sealing device prevents liquid leakage inside the pump.

2. Working Principle of the Split-case Pump

The working principle of the split-case pump is based on centrifugal force. When the motor drives the shaft to rotate, the impeller spins at high speed, throwing the liquid between the blades outward, forming high-pressure liquid discharged from the pump outlet. At the same time, a low-pressure area is created at the center of the impeller, attracting liquid from the inlet pipe to continuously replenish, forming a continuous liquid delivery process. The design of the split-case pump enables it to handle large flow rates and high lift, suitable for scenarios requiring long-distance transport or high water level elevation.

3. Application Fields of the Split-case Pump

The application range of the split-case pump is extremely broad, covering almost all fields requiring liquid transportation. In industrial production, split-case pumps are commonly used in cooling circulation water systems, boiler feedwater systems, and liquid transportation in chemical processes; in agricultural irrigation, they are the main equipment for farmland irrigation and water lifting from canals; in municipal water supply and drainage systems, split-case pumps are used for pressurized water supply in tap water plants and sewage lifting in urban sewage treatment plants. Additionally, split-case pumps play irreplaceable roles in power plants, mines, ships, and various other occasions.

4. Specific Roles of the Split-case Pump in Different Systems

1. Industrial Cooling Circulation System:

In industrial cooling circulation systems, the split-case pump is responsible for transporting cooling water from the cooling tower to production equipment for heat exchange, then returning the heated cooling water back to the cooling tower for cooling, forming a closed-loop circulation. This process is crucial for maintaining normal operating temperatures of equipment and preventing overheating damage.

2. Agricultural Irrigation:

In agricultural irrigation, the split-case pump extracts groundwater or river and lake water, lifting it to the farmland irrigation system to ensure crops receive sufficient water supply. Especially in arid areas, the use of split-case pumps greatly improves water resource utilization efficiency and guarantees agricultural production.

3. Municipal Water Supply:

In urban water supply systems, the split-case pump serves as the core equipment of pressurization pump stations, responsible for transporting tap water from the water source to the city pipeline network, ensuring the water needs of residents and enterprises. During peak periods or when pipeline pressure is insufficient, the split-case pump can respond quickly to adjust water supply pressure and ensure stable water supply.

4. Sewage Treatment:

In sewage treatment plants, the split-case pump in sewage lifting pump stations is responsible for lifting collected sewage from low points to subsequent treatment units, marking the first step in the sewage treatment process. Its efficient and stable operation is significant for improving sewage treatment efficiency and reducing environmental pollution.

In summary, the split-case pump, with its unique structural design and efficient performance, plays an irreplaceable role in multiple fields. Whether in industrial production, agricultural irrigation, municipal water supply, or sewage treatment, the split-case pump, with its reliable performance and wide applicability, has become an indispensable important device in modern water treatment and transportation systems. With continuous technological advancement and diversified application demands, the design of split-case pumps will continue to be optimized to adapt to more complex and variable working conditions, providing stronger water treatment technology support for economic and social development.

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