Ama-drainer

Summary

Product identification

The KSB Ama-Drainer N is a submersible waste water pump available in models 301, 302, 303, and 358.

Main applications:

• Drainage
• Disposal
• Drainage systems
• Lowering groundwater levels
• Maintaining groundwater levels

Designation Key (Example: Ama-Drainer N 301 S E / C):

• Ama-Drainer N: Type series
• 301: Code number (301, 302, 303)
• 35: Free passage (35 mm for N 358 only)
• 8: Motor rating in kW x 10 (0.85 kW for N 358 only)
• S: Float switch (S = with float switch, N = without float switch)
• E: Motor (E = single-phase a.c. motor)
• C: Material (C = version for aggressive water; without material code = version for waste water (standard))

Operating limits

• Head:
  • Ama-Drainer N 301: 6.5 m max.
  • Ama-Drainer N 302: 10 m max.
  • Ama-Drainer N 303: 12.5 m max.
  • Ama-Drainer N 358: 8.5 m max.
• Flow rate:
  • Ama-Drainer N 301: 10 m³/h max.
  • Ama-Drainer N 302: 12 m³/h max.
  • Ama-Drainer N 303: 14 m³/h max.
  • Ama-Drainer N 358: 16.5 m³/h max.
• Fluid temperature: 0 to 50 °C (continuous)
• Max. immersion depth: 2 m
• Particle size (max. diameter):
  • Ama-Drainer N 301, 302, 303: 10 mm
  • Ama-Drainer N 358: 35 mm
• Residual water level (Type NE for manual operation):
  • Ama-Drainer N 301, 302, 303: 15 mm min.
  • Ama-Drainer N 358: 37 mm min.
• Frequency of starts: 30 maximum [starts/hour]

Feed water

The pump is designed for handling clean to turbid water not containing aggressive, abrasive or solid substances (standard version).

Fluids handled (standard version):

• Solid particles with a particle size of up to 10 mm (301, 302, 303)
• Solid particles with a particle size of up to 35 mm (358)
• Faecal-free waste water
• Grey water
• River, lake and groundwater

Ama-Drainer N C-Version (for aggressive water):

• Seawater
• Brackish water
• Water containing salt

A comprehensive selection table for various fluids (e.g., antifreeze agent, edible oil, sodium chloride up to 3% concentration, lime water) is available in the official PDF. See the official PDF for exact tabulated values.

Electrical

• Voltage/frequency: 230 V/50 Hz
• Power input (P1):
  • Ama-Drainer N 301: 430 W max. (0.43 kW)
  • Ama-Drainer N 302: 750 W max. (0.75 kW)
  • Ama-Drainer N 303: 1050 W max. (1.05 kW)
  • Ama-Drainer N 358: 850 W max. (0.85 kW)
• Starting current:
  • Ama-Drainer N 301: 4.1 A
  • Ama-Drainer N 302: 9.5 A
  • Ama-Drainer N 303: 11.5 A
  • Ama-Drainer N 358: 9.5 A
• Power cable: H 07 RN-F.G. or H 05 RN8-F.G. (depending on model and length, e.g., 5 m or 10 m)
• Motor: Jacket-cooled single-phase AC motor with integrated temperature switch.

Mechanical / hydraulic

Design details:

• Fully floodable submersible motor pump
• Close-coupled design
• Vertical installation
• Single-stage
• Integrated swing check valve (models 301, 302, 303)
• Pump controlled by integrated float switch (S version)
• Enclosure: IP68 (permanently submerged) to EN 60529 / IEC 529
• Types of installation: Transportable models

Shaft seal:

• Drive-end: 1 shaft seal ring
• Pump end: two shaft seal rings
• A lubricant reservoir in-between the seal elements ensures cooling and lubrication.

Bearing assembly:

• Enclosed bearings, grease-packed for life

Materials:

• Pump casing: Polypropylene, glass fibre reinforced (30 %)
• Discharge casing: Polypropylene, glass fibre reinforced (30 %)
• Casing cover: Noryl GNF3 (N 301/302/303), Noryl GNF2 (N 358)
• Impeller: Noryl GNF2 (N 301/302/303), Polyamide (N 358)
• Motor housing:
  • Standard: Chrome nickel steel (1.4301)
  • Material variant C: Chrome nickel molybdenum steel (1.4571)
• Shaft:
  • Standard: 1.4028
  • Material variant C: Chrome nickel molybdenum steel (1.4571)
• Float switch (float): Polypropylene

Discharge connection (ISO 7/1 Rp):

• Ama-Drainer N 301, 302, 303: Rp 1 1/4
• Ama-Drainer N 358: Rp 1 1/2

Free passage:

• Ama-Drainer N 301, 302, 303: 10 mm
• Ama-Drainer N 358: 35 mm

Certification

• Germany: All sizes
• Europe: All sizes

Accessories and Control Units

The product line offers a range of accessories and control units, including:

• Pump accessories: Swing check valves, lift check valves, socket gate valves, Y-pipes for dual-pump sets, cover plates, drain hose sets, Storz couplings, bellmouths, and pipe extensions.
• Switchgear: MSE motor protection switchgear, LevelControl Basic 2 control units for single-pump and dual-pump stations (with features like high water alert, alarm buzzer, operating hours counter, phase monitoring), and various alarm switchgears (AS 0, AS 1, AS 2, AS 4, AS 5).
• Control unit accessories: Float switches (available in 3 m, 5 m, 10 m, 15 m, 20 m, 25 m, 30 m lengths, including oil-resistant and NC contact versions), leakage sensors, horns, safety switches, and rechargeable battery retrofit kits for LevelControl Basic 2.

See the official PDF for exact tabulated values, material numbers, and detailed specifications of accessories and control units.

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Disclaimer: This summary is based on extracted text and may not include all figures, footnotes, or the latest revisions from the complete OEM PDF datasheet. Contractual data must always match the specific OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror