A pressure switch on a water pump functions by automatically controlling the pump's operation based on the water pressure in the system. It turns the pump on and off to maintain a specific pressure range.
Here's a breakdown of how it works:
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Pressure Monitoring: The pressure switch constantly monitors the water pressure in the system, typically a well system.
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Cut-on Point: When the water pressure drops to a pre-set "cut-on" point, the switch activates the water pump. This cut-on point is the lower limit of the desired pressure range.
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Pump Activation: Activating the switch completes the electrical circuit to the pump, causing it to start pumping water into the system.
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Pressure Increase: As the pump operates, the water pressure in the system gradually increases.
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Cut-off Point: Once the water pressure reaches a pre-set "cut-off" point, the switch deactivates the water pump. This cut-off point is the upper limit of the desired pressure range.
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Pump Deactivation: Deactivating the switch breaks the electrical circuit to the pump, causing it to stop pumping water.
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Pressure Maintenance: The pump remains off until the water pressure drops back down to the cut-on point, at which time the cycle repeats.
Common Pressure Settings: According to information available as of March 29, 2024, common pressure thresholds for well systems include:
- 40 and 60 psi
- 30 and 50 psi
- 20 and 40 psi
These settings determine the range of water pressure maintained in the system. The pressure switch ensures that the water pressure stays within this range, providing consistent water supply.
| Feature | Description |
|---|---|
| Cut-on Point | The pressure at which the pump turns on. |
| Cut-off Point | The pressure at which the pump turns off. |
| Pressure Range | The difference between the cut-on and cut-off points (e.g., 20 psi in a 40/60 system). |
| Function | To automatically regulate water pressure by controlling the water pump. |
In essence, a well pressure switch works by turning a well pump on when the system's pressure decreases to the cut-on point and switching it off when the pressure increases to the cut-off point.
