Quick Answer
HEAD PRESSURE AFFECTORS: The head pressure of a submersible pump is primarily affected by the depth of the pump, the static water level, and the friction losses within the well casing and pipes.
Factors Affecting Head Pressure
The depth of the pump is a significant factor, as it directly contributes to the head pressure. For every 1 meter of depth, the head pressure increases by approximately 0.098 bar (1.4 psi). To minimize head pressure, it’s essential to optimize the pump’s placement and the well’s design.
Well Casing and Pipe Friction Losses
Friction losses in the well casing and pipes also impact head pressure. The diameter of the well casing and pipes plays a crucial role, with smaller diameters resulting in higher friction losses. For a 10-meter well with a 2-inch casing, for example, the friction loss can be estimated to be around 0.15 bar (2.2 psi) using the Darcy-Weisbach equation.
Static Water Level and Surge Pressure
The static water level and surge pressure are also essential factors to consider. The static water level refers to the water level in the well when the pump is not operating. A higher static water level increases the head pressure. Surge pressure, which occurs when the pump starts or stops, can also impact head pressure. To mitigate surge pressure, it’s recommended to use a pressure tank and a check valve.
Find more answers
Browse the full Q&A library by topic, or jump back to the topic this question belongs to.