Stainless Steel Pump Casing for Liquid Ring Vacuum Pumps

The Stainless Steel Pump Casing for Liquid Ring Vacuum Pumps is a robust, corrosion-resistant housing designed to create the annular space where liquid ring formation occurs, enabling efficient vacuum generation in challenging environments. Manufactured from 304 (UNS S30400), 316L (UNS S31603), or specialty alloys like 254 SMO (UNS S31254), these casings feature precision-bored cylindrical chambers and tangential porting for optimal liquid-gas interaction.

Engineered to withstand high-speed liquid rotation and cyclic pressure changes, the casings undergo stress analysis and surface treatment to ensure long service life in abrasive or corrosive media.

This is a vacuum pump casing with complicated structure.The pump casing has uneven wall thickness with many dispersed hot knots,which makes the feeding difficult.We design the pouring system and control production process to assure the good casting quality and meet the critical dimension tolerance.

The corrosion-resistant material of stainless steel helps ensuring the stability when the vacuum pump works under the rigorous condition and can extend the lifetime.

Superior Corrosion Resistance: High-nickel, high-molybdenum alloys (e.g., 254 SMO with 6% Mo) provide exceptional resistance to pitting and crevice corrosion in aggressive environments like seawater, concentrated acids, or bromide solutions.

Hydrodynamic Chamber Design: Smooth internal surfaces (Ra ≤ 1.6μm) and precise clearance between the rotor and casing (0.2-0.5mm) minimize friction losses, allowing vacuum levels as low as 33 mbar (abs) and gas handling capacities up to 5,000 m³/h.

Structural Reinforcement: Ribbed exterior and thickened flanges resist deformation under differential pressure (up to 1 bar vacuum), with finite element analysis (FEA) optimizing wall thickness for weight reduction without compromising strength.

Easy Maintenance Access: Split-case designs with bolted covers enable quick inspection of rotor and seal components, while replaceable wear rings in the casing bore extend service life in abrasive applications.

The vacuum pump casing part is the main body of a vacuum pump or a compressor.

It houses the impeller and forms the chamber where the liquid ring is created to generate a vacuum.The casing is used to manage fluid flow and maintain the vacuum by converting mechanical energy into fluid energy efficiently.

The vacuum pump casing is assembled together with other important parts to ensure the vacuum pumps and compressors working right.

This kind of pump casings are widely applied in pulp and paper industry, nuclear industry,food equipment industry, semiconductor industry, energy industry, and medical industry,etc.

Chemical Industry: Used in vacuum distillation, drying, and filtration processes, handling aggressive solvents like hydrochloric acid, formaldehyde, or phenol without surface degradation.

Pharmaceutical Manufacturing: Creates sterile vacuum environments for tablet coating, lyophilization, and solvent recovery, with electropolished 316L casings meeting cGMP and FDA 21 CFR Part 117 requirements.

Power Generation: Deployed in condenser air extraction systems of thermal power plants, resisting corrosion from oxygenated water and improving vacuum efficiency for steam turbine performance.

Mining & Minerals: Handles abrasive slurries and acidic leachates in mineral processing, with tungsten carbide-lined casings enduring particle erosion from silica and iron ore suspensions.

Q: What liquids are typically used in liquid ring vacuum pumps with these casings?

A: Common liquids include water, ethylene glycol, silicone oil, or process-specific solvents, selected based on temperature, viscosity, and chemical compatibility with the casing material.

Q: Can the casing be customized for non-standard vacuum ratings?

A: Yes—our engineering team modifies chamber dimensions, material thickness, and port configurations to achieve target vacuum levels (10-1000 mbar) and gas flow rates for unique applications.

Q: How is thermal expansion managed in high-temperature services?

A: Expansion joints or flexible flanges are integrated into the casing design, while material selection (e.g., Inconel 625 for 500°C) balances thermal conductivity and dimensional stability.