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*Patent Pending

DRY-PIT SOLIDS HANDLING VERTICAL OPEN SHAFT PUMP

The United Flo Dry Pit Vertical Open Shaft Pump is part of our exclusive drop-in replacement line, engineered for seamless integration with existing systems. This high-performance, non-clog horizontal centrifugal pump excels in solids handling for wastewater applications, offering unmatched reliability, efficiency, and durability. With advanced hydraulics and a best-in-class bearing design, it delivers outstanding performance, even in low-suction-pressure environments. Whether you’re upgrading or replacing legacy pumps, our Dry Pit HBB Pump ensures a smooth transition without the need to modify external mounting, piping, or electrical systems.

Key features include:

  • Vertical Open Shaft orientation for dry pit installations.

  • Superior solids-handling capability for tough wastewater challenges.

  • Suction port range from 4” to 54” to handle various flow requirements.

  • Industry-leading NPSHR for optimal performance in low-suction-pressure settings.

  • More efficient hydraulics for enhanced performance and energy savings.

  • Improved non-clog design to tackle clogging issues.

  • Best-in-class bearing arrangement for extended pump life.

  • Dimensionally and hydraulically interchangeable with legacy pumps, making it an ideal drop-in replacement.

  • Multiple configurations available, including horizontal (HBB), vertical pedestal mount, vertical turbine, and vertical open shaft (VOS).

  • Designed with CFD and CFX technologies to optimize hydraulic performance.

Tech Specs  

Design Type:
Vertical Open Shaft, Dry Pit Mounted, Single-Stage Non-Clog Centrifugal Pump

Flow Capacity:
Application-specific, with suction sizes ranging from 4" to 54"

Total Dynamic Head (TDH):
10 – 110 feet (depending on impeller trim and duty point)

Solids Handling:
Capable of passing up to 6" diameter solids (model dependent)

Operating Speed:
900 – 1800 RPM

Hydraulics:
Engineered with CFD/CFX for optimized flow paths, energy efficiency, and clog resistance

NPSHr Performance:
Industry-leading low Net Positive Suction Head Required for enhanced performance in flooded suction systems

Mounting Configuration:
Vertical open shaft configuration with above-grade motor and coupling access

Bearings:
Radial and thrust bearings arranged for long-life, high-load vertical applications

Seal Arrangement:
Available with single, double, or split mechanical seals; seal water or oil chamber optional

Materials of Construction:

  • Impeller & Volute: Cast Iron Class 30/40 or optional stainless steel

  • Shaft: 416 or 17-4PH stainless steel

  • Wear Rings & Components: Bronze, stainless steel, or hardened alloys available

 

Installation:
Drop-in replacement for legacy VOS pumps; no piping, mounting, or electrical modifications required

Typical Applications:

  • Municipal Wastewater Treatment Plants

  • Industrial Wastewater Transfer

  • Return Activated Sludge (RAS) and Waste Activated Sludge (WAS) Systems

  • Flooded Suction Pumping Stations

Proudly U.S.-owned and operated, United Flo offers innovative, reliable, and cost-effective pump solutions—ensuring superior performance for your wastewater needs.

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