Saci

For a volume of 25 m³, the recommended technical choice depends directly on the diameter of your sand filter and the pressure losses in the pipes. If you have a filter with a diameter of 300 mm to 400 mm and a short pipe run, the Optima 0.25 CV Single-Phase Pump provides sufficient nominal flow to complete the water recirculation cycle in 4 to 5 hours without overpressurizing the filter bed.

However, if your system has a 450 mm to 500 mm filter or includes additional equipment such as a hydraulic suction pool cleaner, the Winner 0.5 CV Single-Phase Pump provides the flow and operating pressure curve needed to ensure vigorous backwashing without losing performance.

The flow rate of a Saci pump varies according to the motor’s rated power and the pump head or hydrostatic pressure of the hydraulic circuit.

• 0.25 CV power: Delivers an approximate flow rate of 4 to 7 m³/h at a standard water column of 8 to 10 meters, designed for small pools.
• 0.50 CV power: Delivers an average flow rate of 8 to 11 m³/h at 10 meters of water column, suitable for 450 mm to 500 mm filters.
• Higher power (0.75 to 1 CV): Deliver flow rates of 12 to 18 m³/h, suitable for pools of 50 to 80 m³ with longer pipe runs.

Checking the performance curve on the technical specifications plate ensures that the filtration rate does not exceed the regulated 50 m/h/m².

Saci centrifugal pumps are fully compatible with saltwater electrolysis systems thanks to the corrosion-resistant materials used in their internal components. The hydraulic body is injection-molded from glass-fiber-reinforced polypropylene, a polymer inert to the typical salt concentrations of 4 to 6 grams per liter.

They also feature Noryl impellers and a watertight mechanical seal made with metal parts in AISI 316 stainless steel. This alloy resists chemical attack from chlorides, preventing the galvanic corrosion that often damages motor shafts in conventional pumps. Keeping salinity levels within the recommended range extends the seal’s service life without premature wear.

Preventive pre-filter maintenance involves cleaning the basket to prevent turbine cavitation and drastic drops in flow rate.

• Stop the motor at the electrical panel and close the suction valves (skimmer, main drain, and vacuum connection).
• Loosen the hand-tightened wing nuts on the clear lid without using mechanical tools that could crack the thermoplastic.
• Remove the pre-filter basket, take out the accumulated leaves and debris, and rinse it with clean water at low pressure.
• Inspect the rubber O-ring, making sure it is clean and flexible to maintain a watertight seal.
• Place the basket in its guide position, tighten the lid evenly, and open the valves before restarting the pump.

Cleaning every two weeks prevents increases in the motor’s electricity consumption.

Replacing an old pump with a Saci unit is straightforward if the suction and discharge pipe diameters are standard 50 mm or 63 mm. Saci ranges include removable connectors with solvent-weld sockets, making it easy to connect directly to rigid or flexible PVC pipes without modifying the main manifold.

If the height of the suction shaft differs from that of your previous base, simply use removable threaded unions or transition sleeves. Before permanently securing the motor to the slab, make sure the front inlet section is straight and aligned to avoid creating turbulence that reduces the unit’s self-priming capacity during priming.

Each single-phase Saci pump motor features Class F insulation and IP55 mechanical protection against direct water splashes and dust buildup. An automatic-reset thermal contact or circuit breaker is integrated into the internal winding, designed to cut off the power supply if the winding temperature exceeds the safe threshold due to mechanical blockage or a transient overvoltage.

To ensure complete technical protection and comply with the manufacturer’s warranties, it is essential to install a circuit breaker in the electrical panel, precisely rated to the nominal amperage indicated on the motor’s nameplate. This setup prevents the starting capacitor from burning out in the event of prolonged voltage drops.

Calculating a pump’s energy consumption depends on its power input in kilowatts (kW) and the continuous operating hours set on the timer. A 0.5 HP motor typically draws approximately 0.45 to 0.55 kW of electrical power (P1) for each hour of active operation.

In a residential pool filtering for 6 hours a day during the summer season, total accumulated consumption is between 2.7 and 3.3 kWh per day. Thanks to the hydrodynamic design of the Saci impeller, the pump moves a constant volume of cubic meters with less internal friction, optimizing the cost per filtered cubic meter compared with lower-efficiency motors.