CAT CLASS: HQ-10779

3-4 in Centrifugal Dewatering Pump

The 3-4 inch centrifugal dewatering pump represents the high-volume tier of portable centrifugal pumps designed for clean or lightly contaminated water. With flow rates ranging from 290 to 423 gallons per minute and heads up to 85 feet, this size class delivers greater volume than trash pumps of similar port diameter, making it the standard choice for applications where debris content is minimal but water volume is critical. This is the largest band in the centrifugal dewatering pump ladder.

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Elija una clase de tamaño — la capacidad y el alcance varían en la gama.

Especificaciones clave

Especificación	Rango típico	Qué significa
Flow rate	290–423 gpm	Substantially higher volume output than trash pumps with 3-4 inch ports, optimized for clean water applications.
Discharge and suction port diameter	80–100 mm (3.1–3.9 in)	Port sizing balances flow volume with hose compatibility and head capacity.
Max head	82–85 ft (25.0–25.9 m)	Sufficient lift to move water vertically or across moderate distances with minimal elevation change.
Operating weight	26–78 kg (57–172 lb)	Lightweight enough for two-person manual handling; heavier models may include wheeled frames.
Fuel tank capacity	3.1–6.1 L	Runtime varies; larger tanks reduce refueling frequency during extended pumping operations.

Cómo elegir

The 3-4 inch centrifugal dewatering pump is suited to high-volume clean water applications where debris is minimal and flow rate is the primary concern—typical scenarios include trench dewatering, washdown operations, and sites where water clarity allows centrifugal impeller operation without clogging. When solids content increases or debris larger than fine sediment is present, the Up to 3 in Centrifugal Dewatering Pump or a trash pump becomes the appropriate choice, as centrifugal pumps lack the solids-handling capability of semi-trash or trash designs. This is the top rung of the centrifugal dewatering ladder; no larger size class exists for this pump type.

Lo que maneja este tamaño

Deep trench dewatering on utility or pipeline projects with groundwater infiltration
High-volume washdown operations at concrete plants or aggregate processing facilities
Site flooding response where standing water is free of significant debris
Foundation excavation dewatering with clean groundwater seepage
Temporary water transfer from holding ponds to discharge points
Swimming pool or reservoir draining where clarity is high and volume is substantial

Seguridad y operación

Centrifugal impellers require priming and will not self-prime if air enters the suction line; verify water seal before starting
Clean water specification means solids larger than fine silt will damage the impeller or cause performance loss
Discharge hose must be secured; high flow rates at these volumes can cause unsecured hoses to whip under pressure
Engine exhaust requires adequate ventilation; never operate in confined spaces without verified airflow

Transporte y logística

Most models within the 26–78 kg weight range are manually portable by two workers or liftable by one operator using proper technique
Heavier models often feature integrated wheel kits or skid frames for hand-truck style movement on site
Lightweight enough to load into pickup beds or small trailers without lift equipment

Alimentación

All models in this class use gasoline engines, typically in the 5–8 horsepower range
Fuel tank capacities of 3.1–6.1 liters provide 2–4 hours of runtime under typical load conditions
Requires on-site fuel storage and routine engine maintenance including oil checks and air filter service

Preguntas frecuentes

What distinguishes a centrifugal dewatering pump from a trash pump of the same port size?

Centrifugal dewatering pumps prioritize flow rate and efficiency with clean water, achieving higher GPM than trash pumps of similar size. Trash pumps sacrifice some flow capacity for impeller designs that handle solids and debris without clogging, making them better suited to contaminated water.

What is the maximum solids size this pump can handle?

Centrifugal dewatering pumps are designed for clean to lightly contaminated water with only fine sediment. Solids larger than sand particles will cause wear or clogging; applications with debris require a trash or semi-trash pump instead.

How much vertical lift can a 3-4 inch centrifugal dewatering pump provide?

Maximum head for this size class ranges from 82 to 85 feet, though actual lift capacity diminishes as flow rate increases. For lifts exceeding 60 feet or applications requiring both high flow and high head, consult pump curves to verify performance at the specific operating point.

Comparar modelos populares

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Normalizado a las mismas unidades. Un guion significa que el valor no fue publicado.

Modelo	Caudal	Altura manométrica máx	Potencia del motor
Honda WB30	290 gpm	85 ft (25.9 m)	163 cm3
Honda WT30	317 gpm	82 ft (25.0 m)	-
Belle WPX 3/30	1,000 gpm	98.4 ft (30.0 m)	6 hp
Cornell 3WHA-F	835 gpm	242 ft (73.8 m)	-
Generac MCP5515-1	-	50 ft (15.2 m)	-
Generac MCP5515-3	-	50 ft (15.2 m)	-