A pump body is not only a shaped casting. The useful part is decided by sealing faces, threaded holes, fluid passages, material choice, machining allowance, and inspection requirements.
This article is written for buyers preparing a casting RFQ. The best answer still depends on the drawing, material, quantity, machining areas, and inspection requirements.
What Buyers Usually Worry About
- Whether the sealing face can be machined cleanly and inspected.
- Whether porosity or shrinkage may appear near pressure-related areas.
- Whether threaded holes, flanges, and mounting faces will align after machining.
- Whether material documents, pressure test, or leakage test are needed.
Process Points to Review
- Material selection around fluid, pressure, corrosion, and working temperature.
- Casting route and tooling direction around wall thickness, internal cavities, and hot spots.
- CNC machining allowance for sealing faces, ports, flanges, holes, and threads.
- Packing protection for machined sealing surfaces and threaded areas.
RFQ Information to Send
- Pump body drawing, 3D file, material grade, and working medium.
- Pressure or leakage requirement if applicable.
- Machined surfaces, thread notes, roughness, and tolerance requirements.
- Quantity, surface treatment, inspection report, and delivery expectations.
Related Pages
Pump, Valve & Fluid ComponentsCNC Machining for Cast PartsQuality ControlPump Body Casting with CNC-Machined Sealing Surface
FAQ
Which material is common for pump body castings?
It depends on fluid, pressure, corrosion, temperature, and cost. Cast iron, ductile iron, cast steel, stainless steel, aluminum, or bronze may be discussed by drawing.
Is CNC machining usually needed for pump bodies?
Often yes, especially for sealing faces, flanges, threaded holes, mounting faces, ports, and inspection-critical areas.
