Split Case Horizontal Pumps

The majority of the different types of pumps currently in use are probably split-case pumps if you were to take a cursory look at them. Despite not being as adaptable as many other designs, these industrial workhorses have been known to function without failure for decades or even decades at a time.

What Are Split Case Pumps?

Split-case horizontal pumps are made to transport a lot of liquid with few particles at low to medium pressure. In addition to being more expensive than many other types of pumps, they are known to be rigid and difficult to adapt to. Split-case pumps, on the other hand, perform admirably in the tasks for which they were designed, and they typically last for many years without failing.

How They Work

As its name implies, split-case pumps have separate casings. The case’s top can be removed without affecting the driver or any associated piping thanks to the design. The rotor can be easily and quickly examined and fixed as needed as a result of this. Axially split horizontal split case pumps are typical. This means that the flange at the split in the case is in the same plane as the pump’s axis. There are radially split pumps, however, they are usually only employed in high-temperature, high-pressure applications.

Due to the nature of their design, split-case pumps often have a smaller footprint than frame-mounted pumps or a Mag Drive Pump with the same rating. Additionally, they frequently perform more efficiently than a comparable frame-mounted pump. Due to its unique design, the split-case pump stands out from the competition. They have a between-the-bearing plan, which denotes that the direction on both sides supports the impeller. This considers more substantial assistance from the impeller and will enable it to turn much more successfully under pressure.

In addition, one of the most common pump designs that combine a twofold pull impeller is the split case even pump. As a result, the operation is more effective and bearings last longer.

Design Constraints 

Despite their reputation as the industry’s “workhorse” and their tendency to last for many years, split-case horizontal pumps do have some design limitations. There is no constrained gasket plan because the packaging disintegrates as it goes around the parts. As a result, the pump’s capacity to handle pressure is limited. Horizontal elbows and other piping restrictions might affect horizontal split case pumps negatively on the suction side. Such use may cause the impeller’s tension to vary, leading to a blown bearing or seal failure. Pipe strain issues can also be brought on by this type of pump.

Due to their varied masses, the casing halves will expand and contract at various rates when the working temperature changes. This uneven growth may shorten the life of a bearing or a seal.


Split-case horizontal pumps are regularly in use and have frequently been for a sizable length of time in a range of applications. As a result, most manufacturers limit their use to 400 degrees F. This pump design or Mag Drive Pump will be used by many municipal water systems because it is suitable for low-pressure, fixed, high-volume applications. Split-case pumps are employed in cooling towers and other cooling systems that depend on the interchange of sizable amounts of water at low to medium pressure. Additionally, you can find them in places where water is used as a tool for intensity trading, such as heating plants.

Due to their dependability and ease of maintenance, split-case pumps, such as Mag Drive Pump, are used in many industrial processes. They will also be utilized by irrigation applications, which will distribute water to crops and turfs as required.

How Horizontal and Vertical Centrifugal Pumps Work 

A horizontally positioned impeller is mounted on a shaft that is coupled to an electric motor in horizontal centrifugal pumps. Pump impeller vanes turn liquid at high paces. The fluid is pushed toward the transmission as a result. Introducing and keeping up with the multistage even radiating pumps is more straightforward.

  • How the Horizontal Centrifugal Pump Works 

The centrifugal pump raises the fluid’s pressure and flow rate. A flat outward pump has an extremely clear instrument for activity. The impeller and casing of centrifugal pumps play a significant role in the conversion of energy. The pump’s packaging is its fixed part, while the impeller turns. Liquid enters the packaging of an even radiating pump and falls on the impeller edges, which are then turned extraneously and radially outwards.

The fluid exits the impeller at the diffuser section of the casing. Liquid builds speed and strain as it goes through the impeller, empowering it to move from a low situation to a high point. More than one impeller empowers a multistage siphon to accomplish more prominent speeds and tensions.

  • Vertical Centrifugal Pump 

On the other hand, the impeller and motor shafts of a vertical centrifugal pump are mounted vertically. A vertical pump is also known as a cantilever pump due to how closely it resembles hanging from a hook and how little floor space is required for installation. The impeller of an upward pump can balance in the pump while the course stays outside, because of an exceptional shaft and bearing game plan. This necessitates more headroom, making installation and upkeep more difficult.

  • How the Vertical Centrifugal Pump Works

The operation of a vertical centrifugal pump typically relies on either an electric motor or a diesel engine. The fluid then accelerates by entering the primary stage impeller. The liquid leaves the impeller and goes through the diffuser bowl over the impeller, where the liquid’s high activation energy is changed to high tension. An optional impeller straight over the bowl gets liquid from the bowl on account of a multistage siphon.

The fluid supply drops into a lengthy vertical column before spilling outside of the previous diffuser bowl. At intervals of three to five feet, sleeve bushings provide the rotating shaft within the column with support. Water can change its flow direction to match the discharge pipe’s direction thanks to the surface-mounted discharge head of the pump.

Hazel Frank

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