Calpeda NM Close coupled centrifugal pump. Connections: threaded ports ISO 228/1 (BS 2779). Applications - For clean liquids without abrasives, which are non-aggressive for the pump materials ( solids content up to 0.2%). - For water supply. - For heating, air-conditioning, cooling and circulation plants. - For civil and industrial applications. - For fire fighting applications. - For irrigation. Operating conditions Liquid temperature from -10 °C to +90 °C. Ambient temperature up to 40° C. Total suction lift up to 7 m. Maximum permissible working pressure up to 10 bar (16 bar for pumps NMD 25/190; NMD 32/210; NMD 40/180). Continuous duty. Motor 4-pole induction motor, 50 Hz (n = 1450 rpm). NM4: three-phase 230/400 V ± 10% up to 3 kW; 400/690 V ± 10% from 4 to 75kW;