Horizontal Split Case Pumps

What is a horizontal split case pump?

A type of centrifugal pump, in which the casing is split into two separate chambers. It’s different from an end suction pump or inline pump, in which the casing, the suction nozzle, and the discharge nozzle are all included in a single chamber. When the casing is split along a vertical plane in relation to the impeller, it’s known as a vertical split case pump; when it’s on a horizontal plane, it’s known as a horizontal split case pump. This type of casing design is more economical for higher flow applications, and the impeller can be supported by bearings on both sides, an advantage for larger, higher flow pumps.

The pump has the suction and discharge connections in the lower half of the casing, opposed to each other. The impeller is mounted on a shaft which is supported by bearings on both sides.


Horizontal Split Case Pump Manufacturers
Patterson Pump Company (Pump Manufacturer)

HVAC applications - The Patterson EnviroFlo™ line of horizontal split case pumps is designed to minimize energy consumption for a more sustainable HVAC system. The pumps have a flow range to 6,000 gpm and total dynamic head to 160 ft. The standard pump design has a 175 psi case working pressure, with other models allowing for 250 psi.

Water/Wastewater applications - Patterson’s H2O Works™ pump is used to move clear water or low-viscosity, clear industrial process liquids at moderate heads. The split casing design provides easy access to all rotating parts and also meets Hydraulic Institute Standards.  The pump has capacities from 50 gpm to more than 100,000 gpm, with single stage heads to 550 ft and two-stage heads to 1,150 ft. The H2O Works pumps can be designed in vertical, horizontal and custom configurations to meet specific applications.

Fire Suppression applications - The Patterson horizontal split case pump used in the fire suppression market is called the Sentinel™ HSC Pump. The pumps are built with high-efficiency and operate with flows from 150 to 5,000 gpm (568 to 18,925 liters/min), pressures in excess of 390 psi (27 bar), and produce heads to 750 ft (229 m). The pumps are available with electric, diesel, or dual drive power and vertical or horizontal orientation.

Ruhrpumpen (Pump Manufacturer)

Rurhpumpen offers several horizontal split case pumps for the fire protection, process, industrial, and water applications. The pumps are available in single or multistage configuration.

- Fire protection - The company’s single stage horizontal fire pumps are used in power stations, oil and gas, and high rise buildings. The pump has a split case design.

- Single stage -  Ruhrpumpen manufacturers its HSC, HSD, HSR, ZW pumps for the municipal, petrochemical, paper, pipeline applications and more.  The HSC horizontal split centrifugal pump allows for 140,000 gpm and 550 feet of head. The HSD model is made with a high efficiency design.

- Multistage – Ruhrpumpen’s HSM multistage horizontal split case pump has flow ranges to 2,000 gpm, max head to 2,200 ft., and pressure to 740 psi. The pump is used for heavy duty process applications that require high pressure.

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