DAYLIFF SUNFLO-S series submersible pumps are designed for reliable small-scale water supply from boreholes and wells and are the ideal solution for remote pumping requirements in livestock watering, irrigation and general water supply applications. They are of positive displacement three-chamber diaphragm design and can run dry without damage. An internal bypass is also incorporated to prevent pump damage in the event of delivery cut-off. A key feature is automatic restart every 10 mins in the event of low insolation. Pump components are manufactured from high-quality engineering plastics with Santoprene used for the diaphragm and EPDM for the valves. Pump casings is stainless steel and a 50-mesh stainless steel screen. Pumps can be installed either with a direct connection to the PV module or through a charge controller that is connected to a battery for 24hr operation. Pump output will be determined by the PV module input power available.
MOTOR The pump is fitted with of permanent magnet type totally enclosed brushless motor with 24V DC power input from either a direct source or photovoltaic modules. Internal thermal protection is also provided.
PUMP OUTPUTS Performance curves are given at standard test conditions of 1000W/m2 solar irradiance and 25°C. Output will vary throughout the year depending upon prevailing irradiation levels. For estimated daily outputs at continuous pumping multiply the indicated output at the duty point by the daily irradiation given in Graph 1. For indicative purposes factors of 1.1 can be applied for hot arid areas and 0.9 for temperate high altitude areas in the Tropics. The output will vary throughout the day as a proportion of the estimated hourly irradiation as shown in Graph 2.