Grundfos Booster Modules BM, BMS and BMSX

Energy Savings and Efficient Operation

The range of BM and BMS pumps offers numerous advantages for industrial pressure boosting. These pumps feature a simplified design ensuring energy savings and efficient operation across various applications, such as reverse osmosis for desalination and water reuse, and for circulating liquids in systems operating under high static pressure. All BM and BMS pumps are available in high differential pressure (hs) and high inlet pressure (hp) variants.

• High efficiency and energy savings
• Easy maintenance and alignment
• Extreme durability and reliability
• Very small footprint
• Easily integrated into any water treatment system
• Constructed in stainless steel and Super Duplex for critical parts
• Some pumps feature a built-in non-return valve

In principle, the pumps are maintenance-free if motors are greased and pumps are rinsed with clean water when not running.

A Wide Range to Meet Your Industrial Pressure Boosting Requirements

BM booster pump: Offers a unique and solid construction combined with a reliable and noiseless pump. The BM booster pumps clean and aggressive liquids trouble-free, can handle an inlet pressure of up to 60 bar (on request), and can be operated with a Variable Frequency Drive (VFD), which can also be supplied by Grundfos.

BMS booster pump: A complete range designed for applications requiring high differential pressure or high system pressure, constructed in high-grade stainless steel, resulting in up to 120 bar in discharge and 90 bar in inlet pressure. Typical applications include reverse osmosis for desalination and industrial water reuse.

BMSX booster system: This pump system has a unique design dedicated to seawater and brackish water desalination. It consists of a BMS hs pump, a BMS hp pump, and an isobaric pressure exchanger with an efficiency of up to 98%, leading to the lowest possible power consumption per cleaned cubic meter of liquid.

Ideal for Demanding Applications

The BM, BMS, and BMSX pumps and systems are designed for high efficiency, easy installation and commissioning, and to be as maintenance-free as possible. They can be easily integrated into any water treatment system. Applications where these industrial pressure-boosting solutions are used include:

• Desalination: For desalination reverse osmosis systems, where pumping water with a high chloride content is necessary. In seawater desalination plants, regardless of system setup, high-grade steel pumps requiring minimum maintenance that can operate 24/7 are essential, which is precisely what the BMS is designed for. They are engineered for the pressure challenges in these systems, featuring pumps with very high differential pressure and pumps for high system pressure. BMS pumps are available for systems with isobaric energy recovery devices or turbocharger systems.
• Water reuse: For reverse osmosis systems and nanofiltration, where process water needs to be reused. Water reuse enables industrial facilities to save water, reduce costs, and meet compliance targets. The BM and BMS boosters, especially in high-pressure solutions, are optimally designed for this, with requirements similar to desalination. Bundling them with digital dosing pumps, monitoring, measurement, and control devices creates a perfect package for these systems.
• Industrial pressure boosting: For water supply, circulation of aggressive liquids, and demanding applications such as lithium mining and high-pressure washing systems in industry.

For desalination and water reuse applications in a reverse osmosis installation, a packaged solution with high differential pressure (hs/xl) and high inlet pressure (hp) booster, combined with a pressure exchanger, such as the BMSX system, is recommended.

BMSX System Configuration Description: The BMSX system is a comprehensive package for reverse osmosis (RO) desalination. A schematic illustrates a typical setup where feed seawater enters the system. It is pressurized by a high-pressure pump (e.g., BMS 30-23 HS-E-C-P-A-A). The pressurized flow then passes through an isobaric pressure exchanger, which recovers energy with up to 98% efficiency, separating the feed into concentrate and permeate streams. A booster pump (e.g., BMS 60-4 HP-C-C-P-A-A) may further enhance pressure. The diagram indicates various pressure (P) and flow (F) sensors at critical points to monitor and control the system, highlighting potential energy savings per cubic meter of produced water.

Materials Chosen for Durability:

• Duplex and Super Duplex stainless steel, ideal for use in seawater and brackish water applications.
• The shaft seal is made from Silicon carbide/Resin impregnated carbon, specifically designed for high pressure.
• The thrust bearing material is ceramic and carbon.
• Pump bearings and seal rings are made of NBR/LSR rubber.

Connections are standard with Victaulic coupling, with alternatives available upon request.

Introducing the BMS Range

The BMS range differs from the BM range with flexible motor options for use with a variable frequency converter (VFD), either integrated in the Grundfos MGE motor or as an external Grundfos CUE.

Simplified Design and Solid Construction

• Simplified design for easier access to the shaft seal and thrust bearing for trouble-free maintenance.
• The built-in non-return valve is suitable for high pressure and required in combination with many applications.
• Built-in thrust bearing ensures no axial forces on the motor shaft and no load on motor bearings, resulting in simpler motor construction.

The flow path through the pump is designed to minimize stagnant areas. This design philosophy, combined with the chosen materials, ensures optimal performance. High flow areas utilize 1.4539 (AISI 904L), while areas prone to stagnation use the higher-grade steel 1.4410 (SAF 2507).

BMS hs – High Speed Pressure Boosting

Grundfos BMS hs is a complete range of booster modules for reverse osmosis and other high-pressure applications. The directly coupled pump is powered by a high-speed motor; this high speed makes a variable frequency drive mandatory. High speed is chosen to reach the needed pressure, leading to more compact pumps instead of adding more impellers.

Specifications

• Five flow sizes: 7, 17, 30, 46, and 60
• Differential pressure: 0-82.7 bar (maximum 120 bar discharge)
• Inlet pressure: Maximum 65 bar (BMS 7: 20 bar)
• Motor range: 30-180 kW
• Speed: 1700-5500 rpm

Performance Curves Description: The charts display the performance characteristics of BMS hs pumps, plotting Head (pH/m/psi) against Flow Rate (Q [m³/h] and Q [US GPM]) for various models. Efficiency (Eta [%]) is also shown against flow rate. These curves help in selecting the appropriate pump for specific operating conditions.

High Pressure Solution with Two Pumps in Series

Connect two BMS hs pumps in series for a high-pressure solution. Inlet pressure: Max 65 bar. Discharge pressure: Max 120 bar.

Performance Curves Description (Series): Similar to the single pump curves, these charts illustrate the combined performance of two BMS hs pumps operating in series, showing Head and Efficiency against Flow Rate.

Motor Options

• Nidec PM motor with CUE (pre-programmed): 44-180 kW, for all BMS hs sizes.
• Siemens AC motor with any VFD: 30-180 kW, for all BMS hs sizes.

The CUE is included in the package when purchasing a BMS hs pump with a PM motor. If a BMS hs pump with a Siemens AC motor is chosen, the customer can opt to purchase a CUE or supply their own VFD.

BMS hp – High Inlet Pressure Performance

The BMS hp booster module is suitable for high-pressure industrial and water supply applications. It can increase system pressure up to 82.7 bar (1200 psi) and handle equally high inlet pressure. The BMS hp is an optimal solution for:

• Reverse osmosis applications
• Second stage pump for high pressure applications
• Pumps capable of handling high system pressures

The BMS hp can be fitted with a fully enclosed, fan-cooled 2-pole Grundfos MG standard motor or an MGE motor with an integrated VFD.

Specifications

• Nine flow sizes: 17, 30, 46, 60, 77, 95, 125, 160, and 215
• Differential pressure: 0-12 bar (maximum 120 bar discharge)
• Inlet pressure: Maximum 82.7 bar (variant maximum 90 bar)
• Motor range: 3-37 kW
• Speed: 1700-3600 rpm

Performance Curves Description: These performance charts display the Head (pH/m/psi) and Efficiency (Eta [%]) against Flow Rate (Q [m³/h] and Q [US GPM]) for the various BMS hp models.

Motor Options

• Grundfos MGE motor: 3-22 kW, for all BMS hp sizes.
• Grundfos MG motor: 3-22 kW, for all BMS hp sizes.
• Siemens AC motor: 30-37 kW, for all BMS hp sizes.

BMS xl – For Challenging Applications Requiring High Pressure Flow up to 400 m³/h

The large BMS xl booster pumps introduce extended flow ranges up to 400 m³/h in three flow sizes while maintaining high pressure. They are perfect for applications like industrial water reuse and desalination, helping to meet Minimal Liquid Discharge (MLD) and Zero Liquid Discharge (ZLD) strategies.

Specifications

• Three flow sizes: 125, 160, and 215
• Differential pressure: 0-60 bar
• Inlet pressure: Maximum 30 bar
• Motor range: 160-355 kW
• Speed: 1700-3550 rpm

Performance Curves Description: These charts illustrate the performance of BMS xl pumps, showing Head (pH/m/psi) and Efficiency (Eta [%]) as a function of Flow Rate (Q [m³/h] and Q [US GPM]).

BMS xl pumps offer the same high quality build, reliability, and variants as the standard BMS range. They are also available as combined systems with a dedicated CUE frequency converter.

• Built in high-grade stainless steel
• Same high durability and robustness
• Highest efficiency maintained for both the hydraulics and motor
• Uses standard IE4 motors

Motor Options

The BMS xl comes with a standard norm IE4 motor with a maximum speed of 3550 rpm.

• Siemens AC motor: 160-355 kW, for all BMS xl sizes.

Find sizing information for BMS xl on the Grundfos Product Center: https://product-selection.grundfos.com/

BMS Installation with Variable Frequency Drive

The BMS (hs/hp/xl) is a directly coupled pump powered by a high-speed motor, where the high speed makes a variable frequency drive mandatory. With a permanent magnet (PM) motor, the Grundfos CUE variable frequency drive is included. If an asynchronous (AC) motor is chosen, a variable frequency drive is still required, and the Grundfos CUE is recommended. If a different brand is preferred, customers are free to choose. The improved design makes maintenance and service easier than ever.

When receiving a BMS PM with a CUE or any BMS pump with an MGE motor:

• Motor data are pre-programmed.
• Ramp-up and ramp-down are set.
• Set to 'Open Loop' without feedback.

'Open Loop' means that when the VFD is activated, it will speed up to the nominal speed for the pump/motor combination with pre-programmed ramp times. This can be changed if speed control according to the system is needed.

Available Variants

BMS (hs/hp/xl) pumps are highly configurable. If a specific solution for your application cannot be found, contact Grundfos. Variants are available with:

• High pressure
• Industrial motor, 690 Volt
• Over- and under-sized motor
• Certificates
• Clean and dried
• Base frame
• Different paint classes
• Higher IP class
• Standstill heating
• Customer specific nameplate
• More on request

VFD Installation Diagram Description: This schematic illustrates a typical electrical installation for a BMS pump using a Variable Frequency Drive (VFD). It shows the connection from the power supply through screened cable to the VFD (e.g., Grundfos CUE), potentially with a sine-wave filter, and then to the pump motor. It also indicates voltage considerations for different supply ranges (400-480 V, above 480 V).

BMSX – Unbeatable and Complete High-Efficiency RO Package

The Grundfos BMSX pump system is a package consisting of the required high-pressure pumps, booster pumps, energy recovery device, VFDs, and sensors for reverse osmosis systems up to 1,500 m³/day. All components can be easily sized in Grundfos Product Center with basic system information.

Try the powerful BMSX configuration engine in GPC to see recommended selections and potential energy savings. You will also see an installation illustration for the complete bundled solution, including sensors.

• Capable of up to 1,500 m³/day with an energy consumption starting as low as 2 kWh/m³ of produced water.
• Features components made of Super Duplex stainless steel, polymer, and ceramic, making them extremely resistant to their operating environment.
• Isobaric pressure exchanger with an efficiency up to 98%.
• Super-efficient and highly dependable regardless of the application.
• Compact design and a very small footprint.

Grundfos Product Center: https://product-selection.grundfos.com/

BMSX System Configuration Example Description: This diagram depicts an example configuration of the BMSX system for a reverse osmosis process. It shows a feed flow of 100 m²/h at 70 bar pressure. The system includes a high booster pump (BMS 30-23 HS-E-C-P-A-A), an isobaric pressure exchanger for energy recovery (achieving up to 98% recovery), and a booster pump (BMS 60-4 HP-C-C-P-A-A). The diagram details the flow rates and pressures for feed, concentrate, and permeate streams, along with sensor locations (F for flow, P for pressure). It highlights the significant energy savings achieved compared to standard systems.

BM/BM hp 50/60 Hz – For Industrial Boosting

The BM booster offers trouble-free pumping of clean and aggressive liquids and for circulation of liquids in systems working under high static pressure. Grundfos BM booster pumps are available in various high-grade stainless-steel qualities and designs for in-line mounting and high system pressure in a leak-free construction.

BM Features:

• Various steel qualities: 1.4301 (AISI 304), 1.4401 (AISI 316), and 1.4539 (AISI 904L).
• Silent operation, less than 70 dB(a).
• Modular design, capable of up to 80 bars at a given flow.
• Compact design with pipe diameters of 114.3, 168.8, or 273 mm.
• Leak-free construction with no shaft seal.

The BM is perfect for desalination and water reuse applications as part of a reverse osmosis system.

BM Specifications

• Twelve flow sizes: 3A, 5A, 9, 17, 30, 46, 60, 77, 95, 125, 160, and 215
• Differential pressure: 0-40 bar
• Inlet pressure: Maximum 50-60 bar (version dependent)
• Motor range: 0.75-92 kW
• Speed: 50-60 Hz
• Liquid temperature: 40 °C

BM Performance Curves Description: These charts illustrate the performance of BM pumps at 50 Hz and 60 Hz, plotting Head (HH [ft]/[m]) and Efficiency (Eta [%]) against Flow Rate (Q [m³/h] and Q [US GPM]).

BM hp Specifications

• Nine flow sizes: 17, 30, 46, 60, 77, 95, 125, 160, and 215
• Differential pressure: 0-12 bar
• Inlet pressure: Maximum 82.7 bar (variant maximum 90 bar)
• Motor range: 5.5-30 kW
• Speed: 50-60 Hz
• Liquid temperature: 40 °C

BM hp Performance Curves Description: These charts show the performance of BM hp pumps at 50 Hz and 60 Hz, plotting Head (H [ft]/[m]) and Efficiency (Eta [%]) against Flow Rate (Q [m³/h] and Q [US GPM]).

Motor Options

The BM uses a submersible motor, available in different voltages and temperature classes depending on application demands.

Notes for Sizing or Ordering BM Booster Pumps:

• Size CUE according to motor current, not power size; submersible motors typically draw higher current than a standard norm motor.
• Size the CUE for 10% higher current than the motor needs, if with a T60 motor this is not required.
• If thermal protection of the motor is desired, order with PT100 sensors.

BM Variants and Installations

• High pressure
• Industrial motor (T60)
• Over- and under-sized motor
• Certificates
• Clean and dried
• Different materials
• No terminal box
• Customer specific nameplate
• Straight pipe or elbow
• More on request

Go to Grundfos Product Center to size the pressure boosting system ideal to your needs: https://product-selection.grundfos.com/

Combining BM/BMS Pumps for Higher Flow and/or Pressure Requirements

Parallel Combination for Higher Flow Requirements: Pumps are arranged side-by-side, with their inlets connected to a common supply and their outlets to a common discharge, increasing the total flow rate.

Diagram Description (Parallel): A schematic shows four pumps connected in parallel, illustrating how their individual flows combine to achieve a higher total flow output.

Serial Combination When Higher Pressure is Required: Pumps are connected in a line, where the discharge of one pump feeds the inlet of the next, increasing the total head (pressure).

Diagram Description (Serial): A schematic shows four pumps connected in series, demonstrating how the pressure from each pump adds up to achieve a significantly higher discharge pressure.

Parallel/Serial Combination for Both Higher Pressure and Flow Requirements: A hybrid configuration that combines parallel and serial arrangements to meet complex demands for both increased flow and pressure.

Diagram Description (Parallel/Serial): A schematic illustrates a mixed arrangement of pumps, showing some in parallel groups and these groups then connected in series, or vice-versa, to achieve both higher flow and pressure.

BM Installation with Variable Frequency Drive: It is always recommended to use an output filter when installing a BM pump with a VFD.

Diagram Description (BM VFD Installation): This diagram shows a BM pump connected to a Variable Frequency Drive (VFD), such as a Grundfos CUE. It includes recommended components like a sine-wave filter and screened cable, illustrating a typical setup for speed control and system protection.

Contact Information

Grundfos Holding A/S
Poul Due Jensens Vej 7
DK-8850 Bjerringbro
Tel: +45 87 50 14 00
www.grundfos.com