Selection Guide

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What are submersible pumps used for?

For clean water applications, submersible pumps can be used in drilling or open-pit well applications. Drilling submersibles are used to pump water starting from 50 feet underground. Currently, these pumps are used at depths of 1500 feet. However, with the groundwater level rapidly declining, efforts are underway to design submersible pumps for even greater depths. Drilling sizes can be 3", 4", 5", 6", 7", or 8". Submersible pumps are commonly used in residential apartments, commercial complexes, and municipal and industrial water recycling and irrigation systems.

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How to Choose a Submersible Pump?

The choice of submersible pump depends on the application. Before purchasing a pump, ensure that its specifications meet your requirements. Below are some key requirements to consider when selecting a drilling submersible pump:
• Well size
• Drilling output
• Static water level (below ground level)
• Dynamic water level (below ground level)
• Existing/proposed delivery pipeline size
• Recommended installation depth of the pump set
• Vertical elevation from the water source to the discharge point
• Horizontal distance from the well to the application delivery point
• Number of fittings such as tees, elbows, and valves

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Key Terminology for Understanding Specifications/Requirements

Head: Total head calculation: Total head = Suction head + Delivery head + Friction loss + Fitting loss.
Suction head: The distance between the water surface and the pump suction point. For submersible drilling pumps, this can be considered as zero delivery head – the distance between the pump and the application delivery point.
Friction loss: Head loss due to fluid (water) flowing through the pipeline.
Fitting loss: Head loss due to fittings (such as gate valves, check valves, bends, etc.). *When calculating delivery head and friction loss, the length of both vertical and horizontal pipelines at the delivery point should be considered.
Cylinder diameter: The diameter of the drilling pump is crucial for selecting the appropriate pump size.
Delivery pipe size: The delivery pipe size is the pump outlet pipe diameter. It is measured in inches or millimeters. If there is existing piping, the pump's delivery casing should match the existing pipe size. If it is a new pipeline, the delivery capacity will be determined based on the distance the water must be delivered.
Structure materials: The structure materials should be selected based on the pump's application. The structure materials are important for the pump's reliability.
Construction materials: The amount of water required to release at the outlet is called the discharge rate. The discharge rate is typically about 80% of the total output of a submersible drilling pump. Therefore, select a suitable pump after assessing the required flow rate.