Submersible Pump Head Calculator
A submersible pump head calculator helps you find the total head required for your pump system. It ensures proper water flow and prevents pump failure or inefficiency.
Total Dynamic Head (TDH) Calculator
How to Use Submersible Pump Head Calculator
Follow these simple steps to calculate the required head for your pump system:
- 1Enter Vertical Lift (Static Head)
Measure the vertical distance from the water source to the discharge point. - 2Add Friction Loss
Include pipe length, bends, valves, and fittings. Longer pipes increase friction loss. - 3Include Pressure Head (if required)
Convert pressure requirements into head (1 bar ≈ 10 meters). - 4Input Flow Rate
Enter required flow in liters per minute (LPM) or gallons per minute (GPM). - 5Calculate Total Head
The calculator sums all values to give Total Dynamic Head (TDH).
Tip: Always double-check measurements to ensure accurate results.
How to Calculate Submersible Pump Head
The Total Dynamic Head (TDH) is the total resistance a pump must overcome to deliver water from the source to the destination at the required pressure.
Total Dynamic Head (TDH) Formula:
Step-by-Step Example:
Given:
- Static Head = 30 meters
- Pipe Length = 50 meters
- Friction Loss = 5 meters
- Pressure Requirement = 2 bar
Step 1: Convert Pressure to Head
2 bar × 10 = 20 meters
Step 2: Apply Formula
TDH = 30 + 5 + 20
Step 3: Final Calculation
TDH = 55 meters
Result: You need a submersible pump that can handle at least 55 meters of head.
Submersible Pump Head Conversion Chart
| Parameter | Value Conversion |
|---|---|
| 1 meter head | 3.28 feet |
| 1 foot head | 0.3048 meters |
| 1 bar pressure | 10 meters head |
| 1 psi | 0.703 meters head |
| 10 meters head | 1 bar |
| 100 feet head | 30.48 meters |
Tip: Use this chart to quickly convert units during calculations.
Friction Loss and Pipeline Hydraulics for Submersible Pump Head
Every piping configuration for Submersible Pump Head experiences flow resistance, resulting in a loss of pressure (head loss). This resistance is calculated using the Darcy-Weisbach equation, which factors in pipe roughness, fluid viscosity, and pipe diameter:
Where f is the friction factor (determined by the Reynolds number), L is length, D is diameter, and V is velocity. Minimizing pipeline roughness by using PVC or copper instead of steel helps maintain dynamic pressure in Submersible Pump Head applications.
Fluid Viscosity Correction for Submersible Pump Head Sizing
Most centrifugal pump specs are rated using water as the baseline fluid. If your Submersible Pump Head handles viscous fluids like oils, chemical slurries, or non-Newtonian mixtures, the pump's flow, head, and efficiency will degrade due to viscous drag inside the impeller:
Applying viscosity correction factors (like those from the Hydraulic Institute charts) is vital to avoid motor overload and ensure that the selected pump delivers target outputs under actual operating conditions.
Frequently Asked Questions (FAQs)
To calculate the total dynamic head of a submersible pump, add the static vertical lift to the friction loss inside the pipes. The vertical lift is the exact distance from the water level to the discharge point, while friction loss depends on pipe length, diameter, and the water flow rate.
On a submersible pump, head refers to the maximum vertical height the pump can lift water against gravity. It is typically measured in feet or meters. A higher head rating means the pump can push water from a deeper well or deliver it to an elevated storage tank with adequate water pressure.
The maximum head a submersible pump can produce varies widely by model and motor size. Standard residential well pumps generally produce between one hundred and four hundred feet of head. Specialized high-pressure industrial models are capable of achieving well over one thousand feet of total head.
If the total dynamic head is too high for a given pump, the flow rate will significantly decrease. If the head exceeds the pump's maximum rated capacity, the pump will run continuously without moving any water. This condition, known as deadheading, can overheat the motor and damage the pump.
Total head and pressure are related but not identical. Head measures vertical lift in feet or meters, regardless of fluid density. Pressure is the force exerted by the fluid over an area. You can easily convert head in feet to pressure in PSI by dividing the total head value by 2.31 for water.