What is a Horizontal Split Case pump and what does it look like?

Split Case Pump

Now that we've discussed the various types of centrifugal pumps, including end-suction, submersible, and self-priming, there's another type of pump that's popular in our industry: the Horizontal Split Case Pump. This type of pump is also a sub-type of centrifugal pump, but the pump body is special in that it's separated into two chambers. This is to accommodate a larger volume of water than conventional centrifugal pumps. Now, let's take a look at what a Horizontal Split Case pump is and what it looks like.

A split-case pump (Horizontal Split-Case) literally means a pump housing that is divided horizontally into an upper and lower housing, unlike an end-suction pump that has an open front and back cover. A split-case pump is also known as a double end suction centrifugal pump, as the impellers that suck on both sides are different from normal impellers, or what we sometimes call a snail pump.

Split Case Pump Cutting

                         The two suction impellers are located in the center of the pump housing, with bearings at both ends of the shaft.

Advantages of Split Case Pumps over End-Suction Pumps

1. Split-case pumps have a much higher delivery rate and water volume than end-suction pumps, capable of delivering up to 46,000 cubic meters of water per hour and a maximum distance of 225 meters. They are ideal for firefighting, irrigation, and other high-volume systems.

2. Split-case pumps are more convenient for maintenance because the pump housing can be removed from the top, without any piping work. End-suction pumps, on the other hand, have either front or rear openings. Dismantling the pump for maintenance requires moving the piping first.

3. Due to its unique housing, split-case pumps boast enhanced balance thanks to their design.

• Between-the-bearings pumps feature ball bearings on both sides of the impeller to balance the shaft supporting the impeller's weight. A double-suction impeller is another unique feature of this type of pump, featuring a double-suction impeller design.

• The double-suction design balances the shaft, supporting the use of two ball bearings and reducing the pump's load load compared to centrifugal pumps.

4. Split-case pumps have impellers located between the ball bearings, allowing them to withstand greater vibrations due to vibration-absorbing ball bearings at both ends of the shaft.

Disadvantages of Split Case Pumps

1. Split-case pumps are relatively expensive, but in terms of long-term maintenance costs, they are more cost-effective than end-suction pumps.

2. Split-case pumps are bulky and large, requiring more installation space than end-suction pumps.

GSX Fire Pump

GSX Split Case

When assembled, the "Horizontal Split Case" pump delivers power and functions perfectly. It is a horizontal split case fire pump.

	This type of pump is suitable for low to high volume pumping and should be used where the water level in the reservoir is higher than the pump. If this is unavoidable, a priming tank should be installed to ensure that the fire pump can pump water at all times.

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