OEM Stainless Steel Pump Housing for Rotary Pumps

The OEM Stainless Steel Pump Housing for Rotary Pumps is a custom-engineered solution designed to meet the exacting requirements of gear pumps, screw pumps, and lobe pumps in diverse industrial applications. Crafted from premium-grade stainless steels such as 304 (UNS S30400), 316L (UNS S31603), or duplex 2205 (UNS S32205), these housings undergo precision manufacturing—including investment casting, CNC machining, or forge welding—to ensure seamless integration with pump internals and optimal fluid dynamics.

Engineered for tight tolerance fits (ISO H7/g6) and leak-free operation, the housings feature smooth internal surfaces (Ra ≤ 1.6μm) to minimize friction and enhance volumetric efficiency. They are available in both split-case and monolithic designs, with customizable port configurations (flanged, threaded, or hygienic clamp) to accommodate OEM specifications and international standards like ASME B16.5 and DIN EN 1092-1.

This casting part is a pump housing, produced for lobe pumps. For the inlet and outlet sides, it has a very special inside structure, which needs soluble cores. We can meet the high quality requirements of this kind of pumps.

Customizable Geometry for OEM Integration: Tailored to match legacy pump designs or new-engineered systems, with reverse-engineering capabilities for exact fitment of shafts, bearings, and seals.

Enhanced Corrosion Resistance: Alloy selection targets specific media—316L for chloride-laden fluids, duplex 2205 for high-temperature seawater—paired with optional electropolishing or passivation to extend service life in aggressive environments.

Structural Rigidity: Reinforced ribbing and stress-relieved construction withstand differential pressures up to 50 bar (725 PSI), reducing deformation and ensuring stable operation at speeds up to 3,000 RPM.

Hygienic Design Options: Smooth bore transitions and crevice-free surfaces meet 3A Sanitary Standards for food-grade applications, while bead-blasted finishes offer superior abrasion resistance in industrial settings.

The rotor pump housings are the main body of a lobe pump.

The rotor pump casing has an internal space, which contains the lobes. When the pump starts working, the rotors rotate inside the lobe pump housing. It can transport many kinds of fluids, solid particles or slurry.

The rotor pump combines several important parts working together for efficient fluid flow. It plays a crucial role in ensuring the pump operates efficiently. Such pump housings are commonly applied in industries such as food & beverage equipment, petrochemical, water treatment, shipbuilding, energy and medical equipment industry, etc

Chemical Processing: Used in gear pumps for transferring corrosive solvents, adhesives, and polymer melts, with 316L housings resisting degradation from sulfuric acid and amine solutions.

Food & Beverage: Integral to sanitary lobe pumps for handling dairy products, syrups, and viscous sauces, ensuring compliance with FDA 21 CFR Part 117 and EHEDG guidelines.

Marine & Offshore: Installed in screw pumps for bilge water management and fuel transfer, where duplex 2205 housings withstand chloride-induced pitting in seawater environments.

Lubrication Systems: Forms the core of oil circulation pumps in industrial machinery, with 304 housings providing cost-effective corrosion resistance in lubricating oil applications.

Q: Can these pump housings be customized for non-standard pressure ratings?

A: Yes—our engineering team uses FEA to optimize wall thickness and rib design for pressure ratings from 10 bar to 100 bar, validated via hydrostatic testing at 1.5x operating pressure.

Q: What is the lead time for OEM-specific housing modifications?

A: Typical lead time is 4-6 weeks, including 3D modeling, prototype casting, and dimensional verification against customer-provided blueprints or samples.

Q: Are the housings compatible with magnetic drive pumps?

A: Yes—non-magnetic alloys like 316L are available, and internal surfaces can be machined to precise clearances for seamless integration with magnetic coupling systems.