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 VOS Pump ensures a smooth transition without the need to modify external mounting, piping, or electrical systems.

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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.

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Tech Specs  

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

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

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

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

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Operating Speed:
900 – 1800 RPM

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

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

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

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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

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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

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Typical Applications:

• Municipal Wastewater Treatment Plants

• Industrial Wastewater Transfer

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

• Flooded Suction Pumping Stations

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