Borehole Pump Accessories
Borehole pumps - devices that move water from wells - come in three basic types: submersible, centrifugal and jet. Submersible pumps are the most popular and can be used in both domestic and industrial applications in deep or shallow wells. Centrifugal pumps can only be used in shallow wells, as far as the water table while jet pumps can pump water from over 100 feet underground. Borehole pump accessories include pressure tanks and switches, floaters, hose, connectors and pressure regulators. Pressure managers are accessories that control the pumping according to water consumption and the available pressure from the water source. Pressure managers can be new, stand alone or retrofitted into existing pump systems.
The PM1 pressure manager offers the simplest solution. Once the pump has reached a pressure or either 1.5 bar or 2.2 bar, the PM1 starts and keeps the pump running as long as there is water available. This is a popular accessory in domestic borehole pumps. The PM2 pressure manager allows the user to preset the starting pressure between 1.5 bar to 5.0 bar. This means the manager can be customised to different appliances. As with the PM1, the PM2 starts to pump once the pre-set pressure is reached and continues as long as there is a water flow. This manager can also be used with a pressure tank.
These tanks are vertical double diaphragm, 10 bar pressure tanks ranging in capacity between 80 and 470 litres. A submersible pump drop cable supplies the power to a pump in a borehole. It needs to be tough, flexible and resistant to abrasion, moisture and weather. Drop cables are available with three cores of 2.5 mm, 4.0 mm and 6.0 mm thickness and insulated with PVC or ethylene propylene rubber (EPR). Borehole pump control boxes are available for pump motor ratings between 0.37 to 2.2 kilowatts (kW).