Inspect & Repair of a Six Stage Boiler Feed Water Pump

Repair of a Six-Stage Boiler Feed Water Pump

Alongside our recognized machining and manufacturing capabilities, customers trust us at American Precision Services with advanced repair services, as outlined in the project highlighted here. A customer in the water pump industry contracted us to service a six stage boiler feed water pump which had failed inspection. After careful inspection by our experts to determine necessary repairs, we reverse engineered the required components, drafting them in 3D modeling software. The software was used to virtually assemble the total unit, confirming clearances, fits, and sizes. A range of equipment was employed for the custom manufacturing process including CNC lathes, CNC mills, grinding machines, vertical boring mills, horizontal bar mills, dynamic balancing equipment and assembly fixtures. The parts were composed of 420 stainless steel, 410 stainless steel, CA-6NM alloy, 4150 HT steel, and 932 bronze all machined to tolerances of ±0.001″.

Functionality tests, visual and dimensional inspections were carried out to verify accuracy. Overall dimensions of the finished pump were 84″ in length by 26″ in diameter, with a weight of 2,200 lbs. Features of the upgraded water pump include a capacity of 1,400 gpm, 3,600 rpm speed, 250°F liquid temperature, discharge pressure of 1,500 psig, and total head of 3,588 ft. Turnaround time for this project was 120 days, shipped to the customer in East Chicago, IN. For more details about this six-stage boiler feed water pump inspection and repair project, or the other manufacturing and repair capabilities available please see the table below or contact us directly.

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Inspect & Repair of a Six Stage Boiler Feed Water Pump Project Highlights:

Project Scope

Inspect failed (6) Stage Boiler Feed Water Pump and determine repairs necessary to bring back to OEM tolerances. Work with customer to implement upgrades. Provide pricing and delivery of completed project.

Capabilities Applied/Processes


  • Reverse engineer components.
  • Draft all components in 3D modeling software.
  • Assemble unit in 3D modeling software, confirm clearances, fits, and correct sizes.
  • Manufacture new components.
  • Assemble unit and verify.
Equipment Used to Manufacture Part

CNC Lathes
CNC Mills
Grinding Machines
Vertical Boring Mills

Horizontal Bar Mills
Dynamic Balancing Equipment
Assembly fixtures

Overall Equipment Dimensions

26” Diameter x 84” Long
Assemble Weight: 2,200 lbs.

Equipment Parameters

Capacity: 1,400 gpm
250°F liquid temperature
Total Head 3,588 ft.

Discharge Pressure: 1,500 psig
Speed: 3,600 RPM
(6) stages

Tightest Tolerances

± 0.001”

Material Used

420 Stainless Steel
410 Stainless Steel

4150 HT Steel
932 Bronze

Material Finish

Up to 4 RMS Burnished

In process testing/inspection performed

Dimensional Inspection, Visual Inspection, Functionality Tests

Industry for Use

Water Pump

Delivery/Turnaround Time

120 Days

Delivery Location

East Chicago, IN

Standards Met

Customer Specifications, 2D CAD Drawing

Product Name

Boiler Feed Water Pump