Goulds 4NS12K3MC Submersible Non-Clog Sewage Pump – 7-1/2 HP, Three Phase, 230V
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The Goulds 4NS12K3MC is a 7-1/2 HP submersible non-clog sewage pump built for municipal and industrial wastewater lift station service, with a two-vane enclosed impeller and a 4" ANSI-flanged discharge. This model runs on 230V, three phase, 60Hz, 1750 RPM power. The pump is tested to UL 778 and CSA 22.2 No. 108 standards.
- Horsepower: 7-1/2 HP
- Phase: Three Phase
- Voltage: 230V, 60Hz, 1750 RPM
- Full Load Amps: 21.0 A
- Service Factor Amps: 23.4 A
- Locked Rotor Amps: 160.0 A
- Discharge: 4" 125# ANSI flanged
- Solids Handling: 3" max spherical solids
- Impeller Diameter: 7.5" (code M)
- Frame Size: 210TY
- Shipping Weight: 455 lbs
- Power Cord: 25 ft standard (50 ft optional), 8/4 SOW or SOOW
- Maximum Submergence: 200 ft
- Maximum Working Pressure: 100 PSI
- Maximum Unsubmerged Runtime: 15 min
- Control Requirement: external 3-phase control panel required (simplex or duplex); no float switch or integral control included
- Moisture Sensor: two-wire dual moisture-sensing probes in oil-filled seal chamber; requires connection to control panel with optional Moisture Detection System/alarm relay to be functional
- Certification: Tested to UL 778 and CSA 22.2 No. 108 by CSA (Canadian Standards Association), File #LR38549; CSA-certified motor (cCSAus mark)
Construction & Features:
- Impeller: two-vane enclosed (closed) design; material: cast iron ASTM A-48 Class 30 (optional bronze ASTM B584 C87600 impeller available)
- Wear Ring: replaceable bronze wear ring
- Casing: cast iron ASTM A-48 Class 30, volute type, 4-inch 125# ANSI flanged discharge
- Shaft: one-piece 416 stainless steel
- Bearings: ball, single-row angular-contact Conrad type (radial upper / thrust lower), Class 3 fit per AFBMA Std 20, grease-for-life polyurea grease, L10 30,000 hr min
- Fasteners: 300 series stainless steel
- Motor: NEMA design B, copper windings, Class F insulation rated for inverter duty, air-filled, CSA certified
- Thermal Protection: two normally-closed automatic-reset on-winding thermostats in series (embedded in adjoining phases), open at 320F/160C, reset close at 221F/105C; Class 10 ambient-compensated quick-trip overload protection REQUIRED in external control panel (not integral)
- Mechanical Seal: tandem mechanical seals, standard: upper carbon/rotary + ceramic/stationary, lower carbon/rotary + ceramic/stationary, BUNA-N elastomers, 304 SS metal parts, oil-filled seal chamber between seals
Applications: Municipal and industrial wastewater lift stations, sewage collection systems, and heavy-duty non-clog pumping duty.
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