Stage Pumps

Stage pumps are an essential component of many industrial and commercial operations. They are designed to efficiently move water, oil, and other liquids from one place to another. Stage pumps are highly reliable, robust, and can be used in a wide variety of applications. They are also cost-effective, energy-efficient, and easy to maintain, making them a popular choice for businesses looking for a reliable and efficient pumping solution.

Generally, single-stage pumps are used in applications, which do not require a total head of more than 150 m. Normally, single-stage pumps operate in the interval of 2-100 m. Single-stage pumps are characterized by providing a low head relative to the flow, see figure 1. The single-stage pump comes in both a vertical and a horizontal design.

In HVAC/R & Solar systems, single-stage pumps are used for cooling tower water circulation, make-up water to water systems, and glycol-water mixture circulation. These pumps can also be used to control the water level in tanks and basins. With proper selection and sizing, single-stage pumps are reliable, cost-effective solutions for many HVAC/R & Solar applications. Single-stage pumps have a simple construction and are easy to operate and maintain, making them a great choice for many HVAC/R & Solar professionals.

Vertical multistage in-line pump with return channel casing
Horizontal single-stage
end-suction close-coupled pump
Vertical single-stage in-line close-coupled pump

Multistage pumps are used in installations where a high head is needed. Several stages are connected in series and the flow is guided from the outlet of one stage to the inlet of the next. The final head that a multistage pump can deliver is equal to the sum of pressure each of the stages can provide.

Multistage pumps are made up of several impellers and diffusers that are connected in series along the pump’s casing. The first impeller creates a low pressure at its outlet that is then increased as it passes through the diffusers and other impellers in the series, thus making it possible to reach the desired head. The multistage pumps can guarantee a continuous and efficient flow of water even under the most extreme conditions.

For HVAC/R & Solar industry, multistage pumps have become a popular choice due to their efficiency, reliability, and low maintenance requirements. The pumps can be used to maintain steady pressure in various systems and are mainly suitable for applications where a high head and low flow rate are needed.

Vertical multistage in-line pump
Horizontal multistage end-suction pump

The advantage of multistage pumps is that they provide high head relative to the flow. Like the single-stage pump, the multistage pump is available in both a vertical and a horizontal version.

Multistage pumps offer a high-head and low-flow performance advantage over single-stage pumps. These pumps come in both vertical and horizontal orientations and can be used in a variety of applications. Due to their efficient design, multistage pumps are a great way to maximize output while minimizing energy costs.

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This makes multistage pumps the ideal choice for HVAC/R and Solar applications, where energy efficiency is a priority. For instance, multistage pumps are particularly beneficial for applications involving large temperature changes, such as cooling towers, evaporative coolers, and air conditioning systems. They are also suited for applications that require a wide range of flow rates, such as solar heating systems and water pumps. Overall, multistage pumps offer a high performance and energy efficiency that is unrivaled by single-stage pumps, making them the preferred choice for diverse applications.