N 3127.160

Summary

Product identification

The Flygt N-pump Series are self-cleaning pumps designed for sustained high efficiency.

Operating limits

• Power Ratings: 2.2 hp to 870 hp
• Discharge Sizes: Up to 20” (500 mm)
• Flow Rates: Up to 16,000 US GPM (1,000 l/s)
• Heads: Up to 400 ft (120 m)
• Solids Handling: Can handle dry solids up to 8%

Model-Specific Ratings (60 Hz)

Low Capacity Pumps (Models 3085, 3102, 3127) These models handle capacities up to 1,600 US GPM (100 l/s).

• Model 3085
  • Rating: 2.2–4 hp
  • Discharge: 3" (80 mm), 4" (100 mm)
• Model 3102
  • Rating: 5–6 hp
  • Discharge: 3" (80 mm), 4" (100 mm), 6" (150 mm)
• Model 3127
  • Rating: 7.5–11 hp
  • Discharge: 4" (100 mm), 6" (150 mm)

Medium Capacity Pumps (Models 3153, 3171, 3202, 3301, 3315) These models handle capacities up to 8,000 US GPM (500 l/s).

• Model 3153
  • Rating: 12–23 hp
  • Discharge: 3" (80 mm), 4" (100 mm), 6" (150 mm)
• Model 3171
  • Rating: 25–35 hp
  • Discharge: 4" (100 mm), 6" (150 mm), 10" (250 mm)
• Model 3202
  • Rating: 35–75 hp
  • Discharge: 4" (100 mm), 6" (150 mm), 10" (250 mm)
• Model 3301
  • Rating: 60–105 hp
  • Discharge: 6" (150 mm), 8" (200 mm), 12" (300 mm)
• Model 3315
  • Rating: 85–160 hp
  • Discharge: 8" (200 mm), 12" (300 mm), 14" (350 mm)

Large Capacity Pumps (Models 3231, 3306, 3312, 3356, 3400, 3531)

• Model 3231
  • Rating: 90–335 hp
  • Discharge: 8" (200 mm)
• Model 3306
  • Rating: 70–280 hp
  • Discharge: 12" (300 mm)
• Model 3312
  • Rating: 90–470 hp
  • Discharge: 12" (300 mm)
• Model 3356
  • Rating: 70–280 hp
  • Discharge: 14" (350 mm)
• Model 3400
  • Rating: 60–470 hp
  • Discharge: 16" (400 mm)
• Model 3531
  • Rating: 60–870 hp
  • Discharge: 20" (500 mm)

Feed water

Flygt N-pumps are designed for applications including:

• Wastewater
• Stormwater
• Sludge
• Industrial effluent
• Raw water
• Cooling water
• Abrasive applications and waters with high oxygen content (Hard-Iron™ version recommended).

Electrical

• Motor Type: Class H squirrel-cage induction motor.
• Temperature Rating: NEMA Class B maximum operating temperature rise of 80°C (176°F).
• Stator Windings: Trickle impregnated in resin (Class H insulation), rated at 180°C (355°F).
  • Low and Medium capacity pumps: Enable up to 30 starts per hour.
  • Large capacity pumps: Enable up to 15 starts per hour.
• Variable Frequency Drive (VFD): Motors are capable of fully utilizing available power when operating on a VFD.
• Efficiency: Premium efficiency motors (IE3) are available.
• Compliance: Tested and approved in accordance with national and international standards, including 60034-1, CSA, and IEC60034-1. Explosion-proof versions are available and approved by Factory Mutual, European Standard, and IEC.
• Cable Entry: Water-resistant cable entry provides both sealing and strain relief.
• Sensors:
  • Thermal sensors embedded in stator windings prevent overheating.
  • Optional leakage sensors in stator and oil housings (for low/medium capacity pumps).
  • Analog temperature sensor monitors the lower bearing (for large capacity pumps).
  • Leakage sensors in the stator housing/leakage chamber and junction box (for large capacity pumps).

Mechanical / hydraulic

• Design: Patented N-technology with innovative self-cleaning impeller, modular design.
• Installations: Submersible and dry installations.
• Impeller Options:
  • Cast iron impeller with hardened edges and insert ring (for typical pumping applications).
  • Chopper ring (for cutting long fibers or solids).
  • Hard-Iron™ (60 HRC) (for abrasive and erosion corrosion applications).
  • Adaptive N-impeller (Flygt N3085 – N3127 models) can move axially for easy passage of large solids.
• Shaft: Short shaft overhang to minimize vibration and deflection, promoting quiet operation and prolonging seal and bearing life.
• Seals:
  • Durable tungsten carbide seals offer exceptional mechanical strength and sliding properties.
  • Spin-out™ seal protection expels abrasive particles from the seal chamber.
  • Griploc™ seal (for N3085 – N3127 models): Robust design with solid seal rings and patented griplock spring. Consists of two sets of mechanical shaft seals.
  • Flygt Plug-in™ seal with Active Seal™ system (for medium and large capacity pumps): Patented zero-leakage double-seal system. Inner seal features laser-cut grooves for hydrodynamic pumping effect.
• Bearings:
  • Minimum service life of 50,000 hours (for low and medium capacity pumps).
  • Minimum service life of 100,000 hours (for large capacity pumps).
• Cooling Systems:
  • Cooled by surrounding water (for submersible installations).
  • Cooled by surrounding liquid or with an internal closed-loop cooling system (for medium and large capacity pumps).
  • Available options: w/o cooling jacket, Closed Loop Cooling, Pump media, External.
• Installation Methods:
  • P: Semi-permanent installation within a vertical steel or concrete column.
  • S: Semi-permanent wet well installation with twin guide bars on a discharge connection.
  • T: Vertically-mounted, permanent dry well or in-line installation with flange connections for suction and discharge pipework.
  • Z: Horizontally-mounted, permanent dry well or in-line installation with flange connections for suction and discharge pipework.
  • L: Semi-permanent freestanding installation (transportable version with pipe or hose connection), available for low capacity pumps.

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Disclaimer: This summary is based on the provided text extract. It may not include all figures, footnotes, or the latest revisions present in the official OEM PDF datasheet. Contractual data must always match the specific OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror