Horizontal centrifugal pump orders built around one defined flow and pressure
We supply single-stage, single-suction fire-water pumps for project procurement. The published family covers 150–750 US gpm, with electric-motor or diesel-engine drive selected for the required duty. Pump, driver, coupling arrangement and controller are identified together in the offer.
| Pump family | Single-stage, single-suction centrifugal fire-water pump |
|---|---|
| Catalog casing | Ductile iron |
| Driver | Electric motor or diesel engine, selected for the actual duty |
| Catalog pressure range | 40–151 psi across the published family; selected-unit performance follows its curve |
| Selected table speed | Approximately 3,000 rpm |
| Included equipment | Pump, driver, coupling/base arrangement and controller stated in the offer |
These bands help locate a catalog selection before the actual curve and driver are chosen.
| Flow (US gpm) | Converted flow (m³/h) | Catalog pressure band (psi) | Approx. speed (rpm) |
|---|---|---|---|
| 150 | 34.1 | 40–139 | 3000 |
| 200 | 45.4 | 40–138 | 3000 |
| 250 | 56.8 | 41–136 | 3000 |
| 300 | 68.1 | 48–134 | 3000 |
| 400 | 90.8 | 42–146 | 3000 |
| 450 | 102.2 | 54–146 | 3000 |
| 500 | 113.6 | 65–150 | 3000 |
| 750 | 170.3 | 63–151 | 3000 |
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Selected entries from our single-stage single-suction catalog show pressure bands across selections at approximately 3,000 rpm. Metric flow is converted using 0.227125 m³/h per US gpm. The supplied unit retains its actual curve, speed, impeller and driver data, including the selected configuration for a 60 Hz order.
The published speed is approximately 3,000 rpm. A US 60 Hz order states voltage, phase and motor speed, with the performance curve for that actual pump and driver selection.
This horizontal end-suction selection uses a positive, permanently flooded suction supply. The accepted arrangement accounts for water level, suction losses and required inlet head. A source below the pump requires a separately accepted pump and water-source arrangement.
The project installation specification identifies the applicable NFPA 20 requirements. Orders requiring UL Listing or FM Approval also identify the exact pump, duty, driver and controller configuration covered by the corresponding product evidence.
An end-suction arrangement brings flow into the impeller along its axis. The inlet approach, reducer and nearby fittings need room in the pump-room layout and must follow the approved installation detail.
A separately coupled driver uses a defined base and coupling arrangement. The package drawing identifies the coupling alignment references, guarding and adjustment access at that mechanical interface.
The layout reserves space for the specified service method and removal path. Access around the bearing housing, coupling and casing affects maintenance even when the pump footprint fits the room.
A motor or diesel engine changes electrical, fuel, ventilation and control interfaces. Our offer separates the included driver/controller equipment from site services and installation work.
A new installation coordinates the selected pump curve, general arrangement and driver data before adjacent pipework is fixed. The purchase schedule carries those interfaces together as the defined unit.
A replacement matches the existing duty, suction and discharge interfaces, foundation and driver requirements. We compare those mechanical and electrical details alongside the required flow and pressure.
The offered curve states the actual model, speed and impeller configuration. Required performance test points and witnessing are agreed as part of the order.
Pressure-test records identify the selected pump’s test conditions and acceptance basis. Hydraulic performance is documented on its selected curve and required performance-test records.
General arrangement checks cover nozzle locations, mounting points and the coupling/driver arrangement supplied. Piping loads and installation supports remain defined project interfaces.
Pump and driver identification connect the delivered package to its curve, datasheet and required approval records. Controller documentation is included when it is part of the purchased scope.
The package is supported at the intended structural points and restrained for transport. Flange protectors keep loose material away from the waterway, while coupling and shaft areas remain protected.
Controllers and loose accessories are packed and identified against the package list. The receiving team can distinguish supplied equipment from site-installed services.
Our quote returns the selected duty, pump and driver configuration, included controller and test documents. Packing, delivery destination and commercial terms stay attached to that exact selection.
Select the required flow and pressure together on the actual model’s curve, using its impeller and speed. The family maxima may come from separate catalog selections; the offered configuration identifies the duty that the selected unit supplies.
Use the viewing direction stated on the selected pump drawing or manual. Clockwise viewed from the back of the driver appears opposite when viewed from the suction end. The selected rotation and viewing direction stay together; the word clockwise on its own is incomplete.
The offer identifies the bare pump and each included package item: controller, driver, coupling/base arrangement and loose accessories. Each line states its supplied configuration and quantity.
The horizontal fire-water selection here requires a positive, flooded suction supply. A source below the pump uses a separately accepted water-source and pump arrangement with the required inlet conditions established for that selection.
Provide the required duty, old curve or nameplate details, water-source conditions, nozzle connections, mounting dimensions, driver and electrical data. The replacement is checked against the installed interfaces as well as flow and pressure.
NFPA 20 addresses installation requirements. A UL Listing or FM Approval requirement uses the product evidence for the supplied model and configuration, retained alongside the installation and package documents.
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Send the required flow and pressure, water-source conditions, power supply or engine requirement, package scope and destination. Add the pump-room layout and project approval criteria. We return a selected curve, configuration and included-equipment list.