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Product Overview
Zeren manufactures custom stainless steel pump housings using silica sol investment casting combined with precision CNC machining. This pump housing features an integrated cast structure with internal cavities, connecting ports, mounting feet and accurately machined functional surfaces.
Critical areas such as the internal bore, flange face, mounting holes and sealing surfaces can be CNC machined according to customer drawings to ensure reliable assembly and dimensional consistency.
Category: Pump & Valve Parts
Material: Stainless Steel
Manufacturing Process: Investment Casting + CNC Machining
Surface Finish: As Cast / Bead Blasted / Machined
Application: Pumps, Fluid Handling Equipment, Industrial Machinery
Customization: Drawing-Based OEM Manufacturing
Pump housings often combine complex internal flow passages with demanding assembly and sealing requirements. Investment casting provides an effective way to manufacture these complex geometries while reducing the amount of material that must be removed during machining.
For this type of component, Zeren uses silica sol investment casting to produce the near-net-shape housing before CNC machining the critical functional areas.
Typical machined features include:
Internal bores and circular cavities
Flange faces
Sealing surfaces
Mounting holes
Port connections
Locating and assembly surfaces
This casting-plus-machining approach helps achieve both complex geometry and reliable dimensional control.
Key Product Features
The pump housing incorporates multiple ports, mounting features and internal cavities within one cast component, reducing the need for welded or separately assembled parts.
The internal circular bore and related fitting surfaces are machined after casting to achieve the dimensional accuracy required for assembly.
Critical flange and sealing areas can be CNC machined to meet drawing requirements for flatness, fit and sealing performance.
Mounting features are formed directly during casting and subsequently machined where necessary for stable installation.
Stainless steel provides suitable corrosion resistance and mechanical performance for many pump, valve and industrial fluid-handling applications.
Material grade, dimensions, tolerances, machining requirements and inspection criteria can all be manufactured according to customer drawings and technical specifications.
Manufacturing Process
Customer drawings and 3D models are reviewed before tooling to evaluate casting feasibility, machining allowances, parting considerations and critical tolerance requirements.
Tooling is manufactured according to the approved casting design, followed by wax pattern production and inspection.
The pump housing is produced using the silica sol investment casting process to achieve complex geometry, internal features and consistent surface quality.
After casting, gates and feeding systems are removed. Castings are cleaned, ground and prepared for machining.
Critical internal bores, flange faces, holes, sealing surfaces and locating features are machined according to the drawing.
Finished components are inspected using appropriate measuring equipment to verify critical dimensions and machining features before shipment.
Material Options
Material selection can be adjusted according to corrosion resistance, mechanical requirements and the operating environment of the pump system.
Typical stainless steel grades available include:
304 / 304L Stainless Steel
316 / 316L Stainless Steel
CF8 / CF8M Cast Stainless Steel
Duplex Stainless Steel
Other stainless and alloy steels according to specification
Material composition can be verified by spectrometer testing when required.
For custom pump housings and similar fluid-handling components, we can provide:
Silica sol investment casting
Complex internal cavity casting
CNC turning
CNC milling
Precision boring
Drilling and tapping
Flange machining
Sealing surface machining
Bead blasting
Heat treatment where required
Dimensional inspection
Material verification
First Article Inspection upon request
Our manufacturing process can be adjusted according to the geometry, quantity and technical requirements of each project.
Quality Control
For pump housings, dimensional accuracy is particularly important around the areas that affect installation, sealing and component alignment.
Typical inspection items include:
Internal bore dimensions
Flange dimensions and flatness
Hole diameter and position
Mounting dimensions
Critical wall thickness
Machined surface dimensions
Casting surface condition
Material composition
Overall dimensional conformity
Depending on project requirements, inspection can include CMM measurement, 3D scanning, hardness testing, spectrometer analysis and dimensional reports.
Custom investment cast pump housings can be used in a wide range of industrial fluid-handling systems, including:
Industrial pumps
Centrifugal pump assemblies
Fluid transfer equipment
Water treatment equipment
Chemical processing equipment
Marine fluid systems
Industrial machinery
Pump and valve assemblies
Each component is manufactured according to the customer's actual operating conditions and engineering specifications.
Pump housings often contain curved surfaces, ports, internal cavities and integrated mounting structures that would require substantial machining if produced entirely from solid material.
Investment casting allows these features to be formed close to their final geometry.
Compared with machining the complete component from billet, this can provide:
Reduced material waste
Lower machining volume
Greater design freedom
Integrated complex structures
Consistent repeat production
Better suitability for medium-volume manufacturing
Critical functional surfaces can then be CNC machined to achieve the accuracy required for final assembly.
Send us your 2D drawing, 3D model, material specification, quantity and machining requirements.
Our engineering team can review the casting structure, machining allowances, tolerances and production requirements before quotation and tooling.
