The BH Series direct-coupled pumps are engineered to operate under the most demanding industrial conditions, ensuring absolute compatibility with corrosive and abrasive fluids through a robust, solid thermoplastic construction.

Key design features:

  • Compact integrated design: Features a direct-coupled motor configuration that eliminates the need for a separate bearing frame, significantly reducing the installation footprint and simplifying maintenance tasks.

  • Sealless vertical options: BHS and BXS models utilise an overflow principle to dispense with mechanical seals, providing exceptional dry-running capability and high resistance to liquids with suspended solids.

This serie is designed to fit on ISO2858 for high performance.
All internal components are manufactured in a material corrosive.

The BH Series represents a sophisticated engineering solution for the industrial transfer of highly corrosive and abrasive fluids. At its core, the series is designed to deliver exceptional mechanical robustness by utilising components precision-machined from solid thermoplastic blocks. Unlike standard moulded pumps, this solid-block construction ensures superior dimensional stability and structural integrity, even when subjected to significant thermal fluctuations or aggressive chemical environments.

Integrated Design and Compact Efficiency

A defining characteristic of the BH Series is its direct-coupled motor configuration. By mounting the pump directly to the motor frame, the need for a separate bearing housing and flexible coupling is eliminated. This integrated design results in a significantly reduced installation footprint—ideal for compact skid-mounted systems—and simplifies routine maintenance by removing the need for complex shaft alignment. Furthermore, the unit is fully interchangeable with standard IEC motor frames, ensuring global compatibility.

Sealless Innovation and Operational Safety

To ensure maximum service life, every internal metallic component, including the high-resistance drive shaft, is fully protected by a heavy-duty thermoplastic sleeve. This prevents any contact between the corrosive medium and sensitive internal parts. Fully compliant with EN 22858 and ISO 2858 standards, the BH Series provides a reliable, standardised solution for the most demanding chemical processing, wastewater treatment, and mining applications.

Design & Construction Standards

  • Standardisation: Hydraulic performance and dimensions are fully compliant with EN 22858 / ISO 2858 standards for high-performance process pumps.

  • Integrated Configuration: A single-stage centrifugal design featuring a direct motor coupling. This eliminates the need for a separate bearing frame, ensuring a compact footprint and perfect shaft alignment.

  • Shaft Protection: The high-resistance metallic shaft is completely encased in a heavy-duty thermoplastic sleeve, ensuring zero contact between the fluid and sensitive internal components.

  • Sealless Technology: The BHS and BXS variants utilise a vertical overflow design based on the communicating vessels principle, allowing for seal-free operation and full dry-running capability.

Performance and Range

  • Flow rate: up to 250 m³/h (1,100 gpm)

  • Head: up to 80 mcl (262 ft)

  • Configuration: single-stage centrifugal pump

  • Drive system: direct motor coupling

  • Operation: continuous duty under heavy industrial loads

  • This performance profile makes the BH Series ideal for process industries requiring robust, efficient, and chemically resistant pumping solutions.

Materials Available To ensure absolute chemical compatibility with a wide range of aggressive media, the following solid thermoplastics are available:

  • PP (Polypropylene)

  • PE (Polyethylene)

  • PVDF (Polyvinylidene Fluoride)

  • PVC (Polyvinyl Chloride)

  • E-CTFE (Ethylene Chlorotrifluoroethylene)

Surface Protection & Paint

  • Standard Finish: Finished in RAL 6011 green.

  • Normative Compliance: Applied according to ISO 12944 standards.

  • Environmental Resistance: Available in various treatment levels up to C5M, ensuring maximum protection in highly corrosive or marine atmospheres.

Operational Options

  • International Motor Configurations: Compatibility with standardised IEC (50/60 Hz) and NEMA (60 Hz) motor frames, ensuring the pump can be adapted to any global electrical grid.

  • Hazardous Area Safety: Optional ATEX certification available for all models, guaranteeing safe and compliant operation in environments with potentially explosive atmospheres.

  • Standardised Connection Systems: Flanges available in both EN 1092-1 PN16 and ANSI B16.5 150# standards to facilitate seamless integration into existing pipework.

  • Advanced Sealing Solutions: For processes requiring specific containment levels, the series offers the option to install a double mechanical seal.

Technical Accessories

  • High-Performance Sealing Components: Availability of Variseal® systems and internal gaskets manufactured in PVDF for maximum durability against high-concentration chemicals.

  • Vapour Protection Systems: Multiple configuration options for vapour protection seals, specifically designed to protect the motor and external environment from corrosive fumes.

  • Dry-Run Protection: Integrated electronic protectors to prevent thermal damage by automatically stopping the pump during suction loss or fluid absence.

  • Level Control: High-reliability float switches and level sensors to automate pumping cycles and protect tank integrity.

BHS Motor pumps
BHS Motor pumps

The selection charts illustrate the hydraulic performance range for the BH series at a standard motor speed of 1450 rpm. These curves map the relationship between flow rate and total discharge head, allowing engineers to identify the ideal pump size for specific process requirements.

By offering capacities up to 250 m³/h and heads of 80 metres, this range provides a reliable and space-saving solution for the transfer of corrosive and abrasive industrial fluids.

Frequently asked questions – BN Process Pumps

The BH Series is designed for high-performance transfer in environments where chemical aggression and abrasion are constant challenges. Key sectors include the chemical and petrochemical industries for handling acids and solvents, and water treatment (WWTP) for dosing and neutralisation cycles.

It is also widely used in surface treatment and electroplating for managing aggressive process baths, in mining and metallurgy for chemical effluents, and in fertiliser and acid production where continuous service under corrosive conditions is mandatory.

The BHS (flanged) and BXS (threaded) models utilise a vertical overflow principle that completely dispenses with mechanical seals. This design is a major advantage when pumping liquids containing suspended solids, as there are no seal faces to wear down.

Consequently, these pumps offer exceptional dry-running capability and significantly reduced maintenance requirements, as the most common point of failure—the mechanical seal—is eliminated.

The direct-coupled design offers a much more compact footprint, making it ideal for skid-mounted systems or facilities with limited space. By mounting the pump directly to the motor, the need for a separate bearing housing and flexible coupling is removed.

This not only simplifies installation but also eliminates the need for shaft alignment, reducing labour time during routine motor replacements or maintenance tasks.

Total protection is achieved through a “no-metal-contact” design. The high-resistance metallic drive shaft is entirely encased in a heavy-duty thermoplastic sleeve compatible with the fluid.

Furthermore, the pump body is machined from solid thermoplastic blocks (PP, PVDF, etc.) rather than being moulded, providing superior structural integrity. Optional vapour seals can also be fitted to prevent corrosive fumes from reaching the motor bearings.

Yes. For explosive atmospheres, the BH Series is available with full ATEX certification. For protection against environmental corrosion, the pumps are finished with high-quality RAL 6011 paint in accordance with ISO 12944.

We offer various treatment levels up to C5M, ensuring the equipment can withstand the harshest marine or high-salinity outdoor conditions without structural degradation.

Get in touch today

Receive your free quote