PRA

Summary

Product Identification

The Ebara PRA series consists of 50Hz, 2-pole centrifugal pumps. Available models include PRA 0.50, PRA 0.80, PRA 1.00, PRA 1.50, and PRA 2.00.

Operating Limits

• Liquid Handled: Clean water
• Liquid Temperature: min. +5 °C, max. +80 °C
• Maximum Working Pressure:
  • 0.6 MPa (PRA 0.50)
  • 0.75 MPa (PRA 0.80)
  • 1.2 MPa (PRA 1.00, PRA 1.50, PRA 2.00)
• Minimum Flow Rate: Pumps should not be used at a flow rate below 10% of the best efficiency point to avoid the risk of overheating.

Mechanical / Hydraulic

• Pump Construction:
  • Impeller Type: Peripheral turbine type
  • Shaft Seal Type: Mechanical seal
  • Bearing: Sealed ball bearing
• Pipe Connection:
  • Suction: G 1 UNI ISO 228
  • Discharge: G 1 UNI ISO 228
• Materials:
  • Casing: Cast iron
  • Impeller: Brass
  • Shaft Seal: Ceramic/Carbon/NBR
  • Shaft: Carbon steel - AISI 303 (wet extension)
  • Bracket: Cast iron
• Impeller Diameter:
  • PRA 0.50: 60 mm
  • PRA 0.80: 70 mm
  • PRA 1.00: 70.8 mm
  • PRA 1.50: 77 mm
  • PRA 2.00: 78.2 mm
• Mechanical Seal Components:
  • Up to 0.75 kW models: Rotary seal ring (Carbon graphite), Stationary seal ring (Ceramic), Gasket (NBR), Bellows (NBR), Ring (AISI 304), Self driving spring (AISI 304), Frame (AISI 304), Retainer ring (AISI 304).
  • 1.1 kW and above models: Rotary seal ring (Ceramic), Stationary seal ring (Carbon graphite), O Ring (NBR), O Ring (NBR), O Ring (NBR), Self driving spring (AISI 316), Frame (AISI 304).
• Bearings: Specific sealed ball bearings are used depending on the pump model, phase (single or three-phase), and location (pump side or fan side). For IE3 motors, specific ZZ C3 bearings are noted. See the official PDF for exact tabulated values.
• Dimensions and Weight: Detailed dimensions (mm) and weights (kgf) are provided per pump model and phase in the official PDF.

Electrical

• Motor Type: Electric - TEFC, 2-pole asynchronous motors.
• Phases: Single Phase, Three Phase
• Rotation Speed: ≈ 2850 min⁻¹
• Insulation Class: Class F
• Protection Degree: IP 44 (CEI EN 60034-5)
• Power Rating: 0.37 ÷ 1.5 kW (0.5 ÷ 2 HP)
• Frequency: 50 Hz
• Voltage:
  • Single Phase: 230 ±10% V
  • Three Phase: 230/400 ±10% V
• Efficiency Level (Reg. 640/2009):
  • Single Phase: Not specified (indicated by '-') from 0.37 kW up to 0.6 kW.
  • Three Phase: IE2 from 0.75 kW up to 1.5 kW; IE3 from 0.75 kW up to 1.5 kW.
• Capacitor: Built in for Single Phase models.
• Overload Protection: Built in for Single Phase models; Provided by the user for Three Phase models.
• Motor Casing Material: Aluminium
• Motor Base Material: Aluminium
• Cable Entry Dimensions: PG 11, PG 13.5, M16x1.5, M20x1.5.
• Motor Data: Detailed motor data including capacitor values, efficiency percentages (at 50%, 75%, 100% load), input power, full load current, and locked rotor current are available per model and phase. See the official PDF for exact tabulated values.

Performance Data

Performance curves are available for each PRA model (0.50, 0.80, 1.00, 1.50, 2.00) showing volume flow rate (Q) and total head (H). Measurements were carried out with clean water at 20 °C and a kinematic viscosity of ν = 1 mm²/s (1 cSt). Tolerances are according to ISO 9906:2012 – Grade 3B. A selection chart provides flow rate (l/min, m³/h) and total manometric head (m) for various models and power ratings. See the official PDF for exact tabulated values and performance curves.

Noise Data

• Sound Pressure Level (LpA): <70 dB(A) for all PRA models (0.37 kW to 1.5 kW).
• Tolerance: ± 2.5 dB.
• *Mean value of several measures at 1m distance around the pump.

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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 official OEM PDF datasheet. Contractual data must always match the specific OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror