vertical motorpump

The BHS Series vertical motor pumps are compact, close-coupled units specifically engineered for the continuous transfer of corrosive and abrasive liquids in confined installations where a horizontal layout is impractical.

Key design features:

  • Vertical Monobloc Construction: Integrates the motor and hydraulic body into a single, compact assembly, ensuring perfect shaft alignment and significantly reducing the mechanical footprint.

  • Sealless Overflow Principle: Designed with an innovative overflow system based on the “communicating vessels” principle, eliminating the need for mechanical seals and providing superior dry-running capability.

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

Space-efficient vertical engineering

The BHS Series is the ideal solution for industrial processes requiring a low-footprint installation without sacrificing hydraulic power. By employing a vertical monobloc design, the pump and motor are integrated into a single rigid assembly. This ensures perfect alignment between the motor and the pump shaft, which drastically reduces mechanical wear and vibration, while simplifying the overall installation process in tight plant layouts.

Sealless reliability and shaft protection

A standout feature of the BHS (flanged) and BXS (threaded) models is their ability to operate without a mechanical seal. By utilising an overflow design, these pumps are far less sensitive to liquids with high particle loads and offer full dry-running capability. To ensure long-term durability, the high-resistance metallic shaft is completely protected by a removable thermoplastic sleeve, preventing any contact with corrosive media. Fully compliant with ISO 2858 and EN 22858, the BHS series brings heavy-duty performance to vertical configurations.

  • Pump Type: Vertical, single-stage, close-coupled centrifugal pump.

  • Standardisation: Designed to fit ISO 2858 / EN 22858 standards for high-performance service.

  • Maximum Flow Rate: Up to 90 m³/h (≈ 396 gpm).

  • Maximum Discharge Head: Up to 50 mcl (≈ 164 ft).

  • Materials of Construction: Machined from solid blocks of PP, PE, PVDF, PVC, and E-CTFE.

  • Shaft Protection: High-strength metallic shaft encased in a compatible thermoplastic sleeve.

  • Temperature Range: Operates effectively up to 90 °C, depending on the selected thermoplastic material.

  • Surface Protection: Standard RAL 6011 green (ISO 12944), available with C5M protection for aggressive atmospheres.

  • Mechanical Seal Configurations: While the sealless overflow design is standard, SF (single external), DE (double external), IP (internal SiC/SiC), and IF (internal PTFE/Ceramic) seals are available for specific process requirements.

  • Drive Options: Full compatibility with IEC (50/60 Hz) and NEMA (60 Hz) motor frames.

  • Safety Certifications: Optional ATEX-certified versions for operation in potentially explosive atmospheres.

  • Piping Connections: Standardised flanges per EN 1092-1 PN16 or ANSI B16.5 150#.

  • Advanced Accessories: Variseal systems, internal PVDF gaskets, dry-run protectors, and automated level floats.

Dimensional drawings and mounting parameters

The specialized BHS (flanged) and BXS (threaded) vertical motor pumps are designed with a standardized dimensional architecture compliant with ISO 2858 and EN 22858 standards. These technical drawings provide the physical parameters and fundamental connection details required for precise system design and installation in confined spaces.

Drawing legend:

  • BHS / BXS: Compact vertical pump variants with flanged and threaded connections, respectively.

  • Connections (DNi / DNs): Standardised nominal diameters for suction and discharge ports to ensure perfect coupling.

  • f (Total Height): The critical dimension determining the total physical height of the integrated motor-pump unit.

  • Coordinate q: Precise position coordinate for the exact alignment and orientation of the discharge connection.

  • Heights a, b, c, d: Essential dimensional coordinates required to verify component clearances and intermediate support levels.

  • Mounting Base (h1, h2, Px, pd): Support plate dimensions and support hole configurations to ensure a structurally rigid and vibration-free drop-in installation.

Motor pump bhs
motorpump bhs

The BHS series selection charts and dimensional schematics provide a comprehensive technical overview for the precise integration of these compact vertical motor pumps. The hydraulic curves define operational limits for flow rates up to 90 m³/h and discharge heads up to 50 metres at standard motor speeds.

Together with the detailed mounting parameters, these tools enable plant engineers to identify the optimal pump size and ensure secure installation in space-restricted industrial environments.

Frequently asked questions – BHS Vertical Motor Pumps

The BHS Series is widely utilised in the chemical and environmental industries for the continuous transfer of aggressive reagents and effluents. It is particularly valued in surface treatment and electroplating facilities for managing acid baths in confined spaces.

Additionally, its robust design makes it a preferred choice for pollution control systems (scrubbers) and wastewater treatment (WWTP) where abrasive or corrosive particles are present in the fluid.

By removing the mechanical seal, the BHS series eliminates the single most common cause of pump failure in corrosive environments.

This sealless design allows the pump to run dry without damage and handle liquids with suspended solids more effectively than horizontal pumps. This translates to higher operational availability and a significant reduction in long-term maintenance costs.

Yes. The BHS series features a “no-metal-contact” design. The high-strength metallic drive shaft is entirely encased in a thermoplastic sleeve that is fully compatible with the pumped liquid.

This ensures that no internal metallic component is ever exposed to corrosion, maintaining the mechanical integrity of the drive system.

Absolutely. The BHS series is specifically designed to comply with ISO 2858 and EN 22858 hydraulic and dimensional performance standards. This allows for easy integration into existing industrial infrastructures, providing a “drop-in” high-performance solution for vertical transfer needs.

The BHS is a close-coupled (monobloc) unit, meaning it is designed for rigid, space-saving mounting. It features flanged suction and discharge connections for secure piping integration. For environments with volatile fumes, we also offer various vapour protection seals to protect the motor and the surrounding workspace.

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