JESX / JESXM

Summary

Product Identification

The EBARA JESX series consists of 2-pole, 50 Hz centrifugal pumps. Models include JESX 5, JESX 6, and JESX 8, with single-phase variants designated JESXM.

Operating Limits

• Liquid Temperature: min. +5 °C to max. +45 °C
• Maximum Working Pressure: 0.6 MPa
• Maximum Suction Depth: 8 m
• Rotation Speed: ≈ 2800 min⁻¹
• Noise Data: <70 dB(A) (mean value at 1m distance, tolerance ± 2.5 dB)
• Operating Range: Pumps should not be used at a flow rate below 10% of the best efficiency point to avoid overheating.

Feed Water

• Type of Liquid: Clean water
• Performance Curve Conditions: Measurements were carried out with clean water at 20 °C and a kinematic viscosity of ν = 1 mm²/s (1 cSt).

Electrical

• Motor Type: Electric - TEFC (Totally Enclosed Fan Cooled)
• Number of Poles: 2
• Insulation Class: F
• Protection Degree: IP 54 (standard), IP 55 (on request)
• Power Rating:
  • 0.37 ÷ 0.6 kW
  • 0.5 ÷ 0.8 HP
• Frequency: 50 Hz
• Voltage:
  • Single Phase: 230 ±10% V
  • Three Phase: 230/400 ±10% V
• Capacitor (Single Phase only): Built-in
  • JESXM 5: 10 µF, 450 V
  • JESXM 6: 10 µF, 450 V
  • JESXM 8: 12.5 µF, 450 V
• Overload Protection: Built-in (Single Phase), Provided by the user (Three Phase)
• Currents: Full load and locked rotor currents are tabulated for each model and phase configuration. See the official PDF for exact tabulated values.

Mechanical / Hydraulic

• Pump Type: Closed centrifugal type
• Shaft Seal Type: Mechanical seal
• Bearing Type: Sealed ball bearing
• Pipe Connection:
  • Suction: G 1” UNI ISO 228
  • Discharge: G 1” UNI ISO 228
• Materials:
  • Casing: AISI 304
  • Impeller: PPE+PS glass fibre reinforced
    • JESX 5, JESX 6: Impeller diameter = 104 mm
    • JESX 8: Impeller diameter = 110 mm
  • Casing Cover: AISI 304
  • Shaft Seal (Standard): Ceramic/Carbon/NBR
    • Rotary seal ring: Ceramic
    • Stationary seal ring: Carbon graphite
    • O Rings: NBR
    • Self driving spring: AISI 316
    • Frame: AISI 304
  • Shaft: AISI 303 (Wet extension)
  • Ejector: PPE+PS glass fibre reinforced
  • Bracket: Aluminium
  • Diffuser: PPE+PS glass fibre reinforced
  • Motor Casing: Aluminium
  • Motor Support: Aluminium
  • Impeller Nut: AISI 304
• Bearings:
  • Pump side: 6201 2RSH
  • Fan side: 6201 2RSH
• Dimensions and Weight: Pump dimensions (H3, H4 in mm) and packing dimensions (X, Y, Z in mm) are tabulated. Pump weights (kgf) are also provided. See the official PDF for exact tabulated values.
• Installation Recommendation: Install a foot valve or check valve at the suction pipe to prevent air ingress and potential overheating when the pump stops. Support both suction and delivery pipes to prevent stress on 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 complete OEM PDF datasheet. Contractual data must always match the specific OEM PDF revision used for the project.

Official datasheet (PDF)

Lenntech datasheet mirror