Pentax 3S 3-23 3-Inch 230v Multistage Borehole Pump

Description

The Pentax 3S 3-23 (code 022-922) is a 3-inch multistage borehole pump with 23 impellers and a 0.55 kW (0.75 HP) motor on 230v single-phase. It delivers up to 45 litres per minute and a maximum head of 70 metres, through a 1″ G outlet.

The 3S 3-23 sits in the middle of the range, for medium-depth bores or for shallow bores where you want useful pressure at the house or garden. It gives about 55 metres of head at 20 l/min and 43 metres at 30 l/min. For a shallower, low-pressure job the Pentax 3S 3-15 uses a smaller 0.33 kW motor; for a deeper water level or a pressure vessel, step up to the Pentax 3S 3-30 at 92 metres.

The pump end has a stainless steel shell, pump shaft and coupling, Noryl impellers and self-lubricating polyacetal diffusers, with a 1″ G threaded outlet. Pentax drives it with a 2-pole asynchronous submersible motor with class F insulation and IP58 protection.

Features

• 23 impellers, maximum head 70 m, maximum flow 45 l/min
• About 55 m of head at 20 l/min and 13 m at 45 l/min
• 0.55 kW (0.75 HP) motor, 230v single-phase
• Made for 3-inch wells and boreholes
• Stainless steel shell, shaft and coupling
• Noryl impellers and self-lubricating polyacetal diffusers
• 1″ G threaded outlet
• IP58 motor, class F insulation

Applications

• Domestic water supply from a private 3-inch borehole
• Feeding a pressure vessel or header tank
• Garden and smallholding irrigation
• Lifting water to storage tanks on higher ground

The 3S 3-23 is for clean water only, with no more than 40 g/m³ of sand. It is not a dirty water or drainage pump and must never run dry, so Pentax recommends level probes to switch it off if the water level falls. It is made for 3-inch wells; in a much wider bore, fit a cooling jacket so water flows past the motor.

The Pentax 3S range

All four models are rated to 45 l/min with a 1″ G outlet. See the Pentax 3S 3-inch borehole pumps page for help choosing between them and answers to common questions.