Variable Frequency Drive Vertical Multistage Pump

Vertically mounted, multistage stainless-steel pump engineered for pressurised water systems and industrial liquid transfer. Designed for integration with a variable frequency drive (VFD), this pump delivers smooth, energy-efficient constant-pressure control when paired with an external pressure sensor and controller in a closed-loop system.

Key features

• Vertical multistage centrifugal design for high head in a compact footprint
• Wetted parts fabricated from stainless steel (SS304) — stamped and welded construction for durability and resistance to mildly corrosive media
• CDLF variants suitable for slightly corrosive liquids; CDL variants for non-corrosive liquids
• Optimised for VFD operation: VFD provides speed/frequency control, soft start/stop, direction control and protection while the external pressure controller and sensor maintain constant network pressure
• Energy savings and improved system reliability through frequency conversion speed regulation
• Suitable for a wide range of media (from potable/tap water to many industrial liquids) across varying temperatures, flows and pressure requirements
• Direct replacement option for common vertical stainless-steel multistage models such as CR/CRN-style pumps

Typical applications

• Building pressure boosting and constant-pressure water supply
• HVAC systems, boiler feed, and circulation systems
• Industrial water supply and processing where mild corrosion resistance is required
• Municipal and commercial water distribution systems that require stable outlet pressure

Control and installation notes

• The VFD acts as the actuator; install an independent pressure sensor and controller external to the VFD for true closed-loop constant-pressure control
• System settings can be customised to maintain different pipe network pressures at different times (time-based setpoints) to balance supply and demand
• VFD-based control reduces inrush current and mechanical stress during starts/stops, extending equipment life and reducing maintenance

Benefits

• Stable, adjustable outlet pressure for improved end-user supply quality
• Reduced energy consumption compared with fixed-speed pumping systems
• Lower mechanical wear and longer service life through soft-start/frequency control
• Compact vertical arrangement saves floor space and simplifies installation