Vertical Turbine Pumps

High Hydraulic Efficiency. Easy Maintenance.

Overview ofVertical Turbine Pumps

Vertical turbine pumps are specialised centrifugal pumps designed to efficiently transfer large volumes of liquids from deep wells or reservoirs to the surface. There are two types of vertical turbine pumps: line shaft and submersible. The primary difference between the two types is the motor's location.

Submersible turbine pumps are hermetically sealed, with the motor located inside the pump casing. In contrast, vertical line shaft pumps have their motors positioned above ground, which eliminates the risk of flooding the motor. This configuration also simplifies access and maintenance compared to fully submersible pumps.

Vertical turbine pumps are typically multistage pumps with multiple impellers enclosed in a bowl assembly. They are classified as either deep wells or short-set pumps. Compared to horizontal pumps, vertical turbine pumps generally offer higher efficiency and significant operational cost savings.

KEyAdvantages

Vertical line shaft turbine pumps offer several advantages that make them suitable for various industries.

With the motor located on the surface, it can be replaced or repaired without removing the entire pump assembly.
The flexibility in choosing the drive motor allows for both gas and electric options.
These pumps can effectively operate from open water sources, such as reservoirs, rivers, or pump intake structures.
Vertical turbine pumps are easily customisable and highly efficient for high-head, low-flow applications.

IndustryApplications

Vertical turbine pumps are commonly used in wells for irrigation and municipal water supply. They are ideal for industrial settings where submersible pumps cannot be used because the flow is above the range of turbines, or a motor mounted at the top of the pump is preferred.

Cooling water
Dock drainage
Flood control
Fire service
Irrigation/lift canal
Water supply
Booster service
Dewatering
Water, sewage, and wastewater treatment plant

Design &Operating Principle

Vertical turbine pumps consist of the following main components:

Motor
Discharge head
Rotating impeller (single or multistage)
Diffuser casing, known as the bowl, where water is directed (single or multistage)

The hydraulic performance required for a specific application determines the number of bowl stages in a vertical turbine pump. These pumps use stacked bowls to impart velocity energy, allowing the efficient vertical movement of large liquid volumes.

Water enters the pump through a bell-shaped component called the suction bell and moves into the first-stage impeller, where its speed increases. The water then enters the bowl positioned directly above the impeller, where the high-velocity energy is converted into high pressure.

Afterward, the bowl directs the fluid to the next impeller or stage, and this process continues throughout the pump's stages. Once the water exits the final diffuser bowl, it rises through a vertical column pipe towards the surface.

The rotating shaft is supported by sleeve bearings inside the column, which are lubricated by the water flowing through. At the surface, the pump discharge head redirects the fluid horizontally into the discharge pipe.