BM BMhp series

Summary

Product identification

• Grundfos BM, BMhp Booster Modules
• Available for 50/60 Hz operation.

Applications

The Grundfos BM booster module is suitable for industrial and water supply applications requiring increased system pressure. It is an optimum solution for applications needing:

• Sealless pumps
• Pumps capable of coping with high system pressures
• High heads
• Quiet operation
• Minimum maintenance

Typical applications include:

• Water treatment:
  • Reverse osmosis in domestic water supply systems
  • Hospitals, laboratories, chemical, electronics, and metal industries
  • Ultra-filtration in chemical and galvanic industries
  • Painting workshops, metal and mineral industries
• Liquid transfer
• Pressure boosting
• Closed circulation systems with a high static pressure

Standard pumps available for BM booster modules:

• SP 3A, SP 5A, and SP 9 in 4" sleeve
• SP 17, SP 30, SP 46, and SP 60 in 6" sleeve
• SP 30, SP 46, SP 60, SP 77, SP 95, SP 125, SP 160, and SP 215 in 8" sleeve. Note: BM booster modules are supplied without non-return valves.

Type Key

The type key for BM modules follows the format: BM [Rated pump flow rate] (A) [Number of stages] [Reduced impeller] [Materials].

• BM: Booster module
• Rated pump flow rate: [m³/h]
• (A): Generation
• Number of stages
• Reduced impeller
• Materials: N, NE, R versions. NE indicates pump rubber parts in FKM.

Operating limits

• Flow rate:
  • 50 Hz: Max. 265 m³/h, 1166 US gpm
  • 60 Hz: Max. 310 m³/h, 1364 US gpm
• Temperature: Max. 40 °C / 104 °F. Contact Grundfos for higher temperatures.
• Outlet pressure: Max. 80 bar / 1160 psi.
• Rated speed:
  • 50 Hz: 2870 min⁻¹
  • 60 Hz: 3450 min⁻¹
• Sound pressure level:
  • BM 4" and 6" booster modules: below 70 dB(A)
  • BM 8" booster modules: below 80 dB(A)

Recommended Pressure at 25 °C / 77 °F

Maximum Permissible Liquid Temperature

Feed water

• Pumped liquids: Thin, non-explosive liquids not containing abrasive particles or fibres. The liquid must not attack the pump materials chemically or mechanically.
• If the density and/or viscosity of the pumped liquid is higher than that of water, motors with a higher output than the standard output may be necessary.

Electrical

• Motor type: Asynchronous submersible squirrel-cage motor of the canned type with water-lubricated bearings.
• Voltages:
  • 3 x 380-415 V -10 %/+6 %
  • 3 x 440-480 V -10 %/+6 %
  • Special versions: Voltages up to 1000 V available on request.
• Enclosure class:
  • IP58 (MS 4000, MMS 8000)
  • IP68 (MS 6000)
• Insulation class: MMS wet-wound with PE/PA winding wires.

Mechanical / Hydraulic

• Construction: Modified standard submersible pumps are used. Pump and motor are centered in a stainless-steel sleeve. Both sleeve ends can be connected to piping via Victaulic couplings. A terminal box for electrical connection is at the discharge end.

  • BM 4", 6", and 8" modules: Supplied with straight pipe inlet and outlet.
  • BM 4" modules: Also available with 90° bends at suction and discharge ends.

• Connections (Victaulic coupling, style 77):

  • BM 4" (BM 3A - BM 9): 1 1/4" / ∅42
  • BM 6" (BM 17 - BM 60): 3" / ∅89
  • BM 8" (BM 30 - BM 46): 3" / ∅89
  • BM 8" (BM 60): 4" / ∅114
  • BM 8" (BM 77 - BM 95): 5" / ∅139
  • BM 8" (BM 125 - BM 215): 6" / ∅168

• Material Specification:

  • Pump components (e.g., Valve seat, Top chamber, Impeller, Sleeve): Primarily Stainless steel (1.4301/304, 1.4401/316, 1.4539/904L, 1.4462/SAF 2205) and NBR/PPS.
  • Motor components (e.g., Shaft, Motor sleeve, Motor end shield): Stainless steel (1.4057/304, 1.4462/SAF 2205, 1.4401/316, 1.4539/904L), Cast iron (EN-JL1040 for BM motor end shield), Tungsten carbide/ceramic, Ceramic/carbon, NBR/Buna N.
  • Specific material grades vary by component and N/R version. See the official PDF for exact tabulated values.

• Performance Data:

  • Performance curves are available for BM 3A, BM 5A, BM 9, BM 17, BM 30, BM 46, BM 60, BM 77, BM 95, BM 125, BM 160, BM 215 (50 Hz and 60 Hz).
  • Performance curves are available for BMhp 17, BMhp 30, BMhp 46, BMhp 60, BMhp 77, BMhp 95, BMhp 125, BMhp 160, BMhp 215 (50 Hz and 60 Hz).
  • The curves apply to actual speeds at 50 Hz or 60 Hz, based on average values according to ISO 9906 Annex A.
  • Test liquid: airless water at 20 °C. Kinematic viscosity: 1 mm²/s (1 cSt).
  • Conversion between head H (m) and pressure p (kPa) is for water with a density of ρ = 1000 kg/m³.

• Series and Parallel Operation:

  • Series operation (high pressure): Multiple modules connected in series. Resulting pressure is the sum of individual module pressures; flow rate remains the same as for one pump. Ensure maximum inlet pressure is not exceeded.
  • Parallel operation (high flow): Multiple modules connected in parallel. Resulting flow is the sum of individual module flows; pressure remains the same as for one pump.

Efficiency

• EuP ready: BM, BMhp pumps are energy-optimised and comply with the EuP Directive (Commission Regulation (EC) No 547/2012) effective from 1 January 2013.
• Minimum Efficiency Index (MEI): A dimensionless scale unit for hydraulic pump efficiency.
  • EU regulations: MEI ≥ 0.1 (from 1 Jan 2013), MEI ≥ 0.4 (from 1 Jan 2015).
  • Benchmark for best-performing water pumps (2012): MEI ≥ 0.70.
• Efficiency and MEI Index for BM pumps:
  • BM 3A-9: 58% efficiency, MEI ≥ 0.80
  • BM 5A -12: 60% efficiency, MEI ≥ 0.56
  • BM 9: 71% efficiency, MEI ≥ 0.70
  • BM 17-9: 74% efficiency, MEI ≥ 0.76
  • BM 30-9: 75% efficiency, MEI ≥ 0.50
  • BM 46-9: 76% efficiency, MEI ≥ 0.50
  • BM 60-9: 77% efficiency, MEI ≥ 0.60
  • BM 77-9: 78% efficiency, MEI ≥ 0.44
  • BM 95-9: 79% efficiency, MEI ≥ 0.50
  • BM 125-9: 79% efficiency, MEI ≥ 0.37
  • BM 160-9: 80% efficiency, MEI ≥ 0.39
  • BM 215-9: 83% efficiency, MEI ≥ 0.46

Automatic Control Devices

• The system must be fitted with flow and pressure control devices to protect pumps against dry running and ensure minimum cooling water flow past motors.
• A pressure switch on the suction side:
  • Triggers an alarm and stops pumps (max. 15 sec.) if pressure drops below 0.5 bar / 7.25 psi for BM 4" and BM 6", or 1 bar / 14.5 psi for BM 8".
• Flow switches on all discharge connections:
  • Stop the system at set minimum flows.
  • Cutting-in is adjusted for a minimum time delay equivalent to the maximum starting frequency of the system.

Checking of Operation

At suitable intervals, depending on operating hours, the following should be checked:

• Flow
• Starting frequency
• Control and protective devices
• Liquid temperature
• Minimum flow through modules during operation

Accessories

• CUE frequency converter
• MP 204 motor protector
• G100 gateway

Order Data

Order data tables for 50 Hz and 60 Hz models (BM 4", BM 6", BM 8", BMhp 6", BMhp 8") provide details on motor output, rated current, length, product numbers for different material versions (1.4301, N, NE, R), net/gross weight, and shipping volume. See the official PDF for exact tabulated values.

---

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