PERFORMANCE RANGE ? Flow rate up to 375 l/min (22.5 m?/h) ? Head up to 390 m APPLICATION LIMITS ? Maximum liquid temperature +35 ?C ? Maximum sand content 150 g/m? ? Immersion limit: ? 200 m with 4PD motor ? 100 m with 4PS motor ? Installation: ? vertical ? horizontal, with the following limits: 4SR1 – 4SR1.5 – 4SR2 – 4SR4 up to 27 stages 4SR6 – 4SR8 – 4SR10 – 4SR12 – 4SR15 up to 17 stages ? Starts/hour: 20 at regular intervals ? Minimum flow rate for motor cooling 8 cm/s ? Continuous service S1 INSTALLATION AND USE Suitable for use with clean water with a sand content of no more than 150 g/m?. Because of their high efficiency and reliability, they are suitable for use in domestic, civil and industrial applications such as for the distribution of water in combination with pressure tanks, for irrigation, for washing plants etc.