e-HM, P, S, N Series

Summary

Product identification

The e-HM™ Series consists of threaded horizontal multistage centrifugal electric pumps, equipped with IE3 motors and designed for 50 Hz operation. These are non-self-priming, end-suction pumps with an axial threaded inlet and radial threaded outlet, featuring a close-coupled design and mechanical seals.

The series is available in two main configurations:

• "Compact" design: For sizes 1HM, 3HM, and 5HM up to 6 stages.
• "Sleeve" design: For sizes 1HM, 3HM, and 5HM from 7 stages and above, and all models of 10HM, 15HM, and 22HM.

Three different material combinations are offered:

• HM..P: Stainless steel pump body (EN 1.4301/AISI 304) with Noryl™ impellers for sizes 1HM, 3HM, 5HM, and 10HM up to 6 stages.
• HM..S: Full stainless steel (EN 1.4301/AISI 304) for all models.
• HM..N: Full stainless steel (EN 1.4401/AISI 316) for all models.

The pumps are suitable for applications such as:

• Pressure boosting and water supply systems.
• Washing and cleaning industry, including vehicle washing.
• Circulation of hot and cold liquids (e.g., water, water and glycol) for heating, cooling, and conditioning systems.
• Water treatment applications.
• Handling of moderately aggressive liquids.

All pumps are certified for drinking water use (WRAS and ACS).

Operating limits

• Flow rate: Up to 29 m³/h.
• Head: Up to 159 m.
• Ambient temperature:
  • From -15°C to +50°C for three-phase versions.
  • From -15°C to +45°C for single-phase versions (from -15°C to +40°C for models 1HM06S/N, 3HM03S/N, 3HM02P, 5HM02S/N, and all models with 0,95 kW motors).
• Storage and transport temperature: From -40°C to +60°C.
• Maximum operating pressure:
  • 10 bar (PN 10) for pumps with Noryl™ impellers.
  • 16 bar (PN 16) for pumps with stainless steel impellers.
• Noise: Mean sound pressure (Lp) measured as per Curve A (Standard ISO 1680) with a tolerance of 3 dB (A).
  • For specific power (kW) values, noise levels (LpA dB) are tabulated in the official PDF. For example, 0,30 kW is 60 dB, 0,75 kW is 55 dB, 5,5 kW is 60 dB.

Feed water

• Temperature of the pumped liquid:
  • Minimum from -10°C to -30°C, depending on gasket material.
  • Maximum +90°C for three-phase versions and uses according to EN 60335-2-41.
  • Maximum +120°C for three-phase versions with stainless steel impellers (HM..S, HM..N) and uses other than EN 60335-2-41.
  • Maximum +60°C for single-phase versions.
• A compatibility chart for materials in contact with commonly used liquids is available in the official PDF, providing recommendations for elastomers and seal types based on liquid concentration and temperature.

Electrical

• Motor type: Electric short-circuit squirrel-cage motor (TEFC), enclosed construction, air-cooled, 2-pole.
• Protection grade:
  • IP 55 as motor only (EN 60034-5).
  • IP X5 as electric pump (EN 60335-1).
• Insulation class: 155 (F).
• Performances: According to EN 60034-1.
• Efficiency class: Three-phase motors from 0,75 to 5,5 kW are efficiency class IE3.
• Standard voltage (50 Hz):
  • Single-phase: 220-240 V.
  • Three-phase: 220-240/380-415 V for powers up to 3 kW.
  • Three-phase: 380/415/660-690 V for powers above 3 kW.
• Overload protection:
  • Single-phase versions: Built-in automatic reset overload protection up to 2,2 kW.
  • Three-phase versions: Overload protection to be provided by the user.
• A comprehensive table of available voltages for 50 Hz and 60 Hz, indicating standard or upon-request options, is provided in the official PDF.

Mechanical / hydraulic

• Connections:
  • Standard: Rp threaded for both suction and discharge manifold.
  • On request: NPT thread or DN Victaulic®.
• Nominal connection sizes (Rp thread / DN Victaulic®):
  • 1HM, 3HM: Suction 1" (25), Delivery 1" (25).
  • 5HM: Suction 1 1/4" (32), Delivery 1" (25).
  • 10HM: Suction 1 1/2" (40), Delivery 1 1/4" (32).
  • 15HM, 22HM: Suction 2" (50), Delivery 1 1/2" (40).
• Hydraulic performances: Compliant with ISO 9906:2012 - Grade 3B (formerly ISO 9906:1999 - Annex A).
• Mechanical seals:
  • Standard: Ceramic / Carbon / EPDM.
  • Other types available, including Silicon Carbide/Carbon/EPDM for PN16 applications.
  • Elastomers: EPDM, FPM, FFPM (Kalrez®).
• Design features:
  • Pump body thickness increased by 20% for heavy-duty operation.
  • "Essential O-ring design" reduces sealing weaknesses (1 O-ring for Compact, 2 for Sleeve designs).

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. For contractual data and complete specifications, always refer to the specific OEM PDF revision used on your project.

Official datasheet (PDF)

Lenntech datasheet mirror