Description

Technical Parameters

Product Overview

Pump housings enclose the impeller and volute, so casting quality directly determines flow efficiency, pressure containment, and vibration behavior in service. We produce carbon steel pump housings cast parts using investment casting for smaller, geometrically complex bodies and water glass casting for larger housings, followed by precision CNC machining of the bore, flange faces, and mounting points. This combination gives you internal soundness with no porosity at pressure-critical wall sections, along with the tight tolerances a pump assembly needs at the seal, bearing, and flange interfaces.

Technical Parameters

Item	Specification
Casting process	Investment casting (smaller housings); Water glass casting (larger housings)
Secondary process	CNC turning, milling, boring, drilling, tapping
Material	WCB, WCC, 20#, 45#, 42CrMo, 304, 316, 316L, CF8M, A356
Single part weight	0.5 kg – 200 kg
Max casting dimension	Up to 1000 mm
Casting tolerance	±0.2 mm (CT6–CT9 depending on size)
Machining tolerance	±0.02–0.05 mm on bores, seal faces, and flange faces
Surface roughness	Ra 3.2–6.3 μm as cast; Ra 1.6 μm or better on machined sealing faces
Pressure/leak testing	Hydrostatic test per customer-specified pressure
Heat treatment	Normalizing, quenching and tempering, stress relieving
Surface treatment	Shot blasting, painting, epoxy coating, zinc plating
Inspection	Spectrometer, CMM, hardness test, dimensional report, PT/UT/X-ray on request

Figures above reflect our general casting and machining capability range. Exact parameters for your housing are confirmed against your drawing and pressure rating during engineering review.

Manufactured According to Customer Drawings

All carbon steel pump housing castings are produced strictly to your engineering data. We accept STEP, IGS, and PDF/2D drawing formats and hold ±0.2mm as our standard casting tolerance, with tighter tolerances on machined bores and sealing faces. If you have only a sample housing and no drawing, our engineers can reverse-engineer it into a CAD model before tooling begins.

Typical Materials

Grade selection depends on the pumped medium, pressure rating, and operating temperature:

Carbon steel: WCB, WCC, 20#, 45#
Alloy steel: 42CrMo
Stainless steel: 304, 316, 316L, CF8M
Aluminum alloy: A356

WCB is the standard grade for general water and moderate-pressure service; 316/316L or CF8M are used where the pumped fluid is corrosive; alloy steel suits higher-pressure or higher-temperature duty. Our engineers can recommend a grade based on your fluid, pressure, and temperature data.

Production Process Introduce

3233

RFQ handle process

Get contact

You can find our contact info for further communication in "Contact US" column.
Send drawing

The 2&3D drawing format can be PDF, STEP, DWG, DXF and soon, can be sent via email. Wechat, WhatsApp, link.
Get quotation

After clear the demand of customer, we can send you the quotation with PDF format for documentation.
Sign NDA

For requirements for confidentiality of drawings, we can signed the NDA before you send drawing.
Finish feasibility study

The feasibility study of drawing is most key point to ensure the part can be fully meet drawing specifications, which is include material, dimension, surface treatment, and testing request.

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