Series features Delta 1755: Equipment Check valve: No Draining plug: Yes Fittings: Not included Handle: Included Support base: Included Electrical characteristics Electrical isolation: F Class Motor speed operation: Constantly speed Motor type: Asynchronous Protection rating: IP44 Reset: Automatic Service factor: S1 Service type: Continuous Manufacturing characteristics Discharge connection type: Nut Discharge diameter: 1" G Impeller type: Closed Motor cooling: Fan Stages: Multi stage centrifugal pump Suction connection type: Nut Suction diameter: 1" G Suction type: Selfprimming Tightness by: Mechanical Seal Materials Diffuser: PPO + 30% GF Discharge body: Stainless steel AISI 304 Gaskets: NBR Impeller/s: Stainless steel AISI 304 Mechanical seal: Graphite-Steatite Mechanical seal bracket: Technopolymer Motor casing: Aluminium Pump shaft: Stainless Steel AISI 420 Suction body: Stainless steel AISI 304 Support base material: Polyamide 6.6 + 30% GF Usage limits Liquid temperature (ºC): Min: 4 - Max: 35 Maximum no. of motor start-ups (start-ups/minute): 0,50 Maximum suction (m): 9