"Minor" electric submersible dirty water pump

Technical data and special features:

• Air valve: forced cooling of the pump in a dry-running situation / SMART motor protection: phase failure protection, direction of rotation control / Pump cover: easy maintenance of the electrical components / Outer casing made of corrugated stainless steel
• External oil control screw: easy service and maintenance / Test chamber: early warning of seal problems / Cartridge seal: pre-assembled, easy and quick installation / Seal retention: less wear on seals
• One adjustment screw: easy adjustment of the impeller for optimal performance / Wear protection: higher wear resistance / Nitrile rubber shock absorber: first-class shock protection
• Three-phase electric motor: squirrel-cage motor, insulation class: H (IEC 85)
• Pump type: N - normal pressure and H - high pressure
• Max. delivery head: 21.5 m (N) / 37 m (H)
• Max. flow rate: 2,040 l/min (N) / 1,020 l/min (H)
• Shaft speed: 2,870 rpm
• Rated current at 230 V: 13 A / Rated current at 400 V: 7.3 A / Rated current at 500 V: 6 A / Rated current at 1,000 V: 2.9 A
• Pressure connection diameter: 4" (N) and 3" (H) / Pressure connection: ISO-G
• Motor protection: Phase monitor for phase sequence and phase failure, temperature monitor with thermal sensors in the stator open at 140 °C (= SMART system), air cooling valve
• Rubber hose cable - SubCab: 4G2.5 mm², length 20 m
• Bearing: Ball bearing with C3 pitch
• free passage: Ø 10 mm (maximum size of solids)
• Optional accessories: zinc anodes, float switch, dryflow bottom suction sleeve, tandem connection, floating pontoon

Application limits:

• Max. immersion depth: 20 m
• Max. liquid temperature: 40 °C
• pH value of the liquid: 5 - 8
• Max. density of the liquid: 1,100 kg/m³

Materials:

• Castings: aluminum
• Outer housing, motor shaft, screws/nuts: stainless steel
• Impeller / Suction cover: Hard-Iron™
• Diffusers / O-rings: Nitrile rubber

Shaft seals:

• Seal cartridge with double sliding ring in an oil chamber
• Material - lower seal: silicon carbide - silicon carbide
• Material - upper seal: tungsten carbide - aluminum oxide

• Connection voltage: 400 V
• Input power: max. 4.5 kW
• Ø: 286 mm
• Frequency: 50 Hz
• Weight: 52 kg
• Height: 793 mm
• Brand: Grindex
• Rated power: 3.7 kW
• Protection class: IP68