Exploring Water-Injected Screw Technology for Reliable Oil-Free Compressed Air

Oil-free compressed air is central to quality and safety across pharma, food, beverage, and electronics. This whitepaper explains how water-injected screw compressors deliver Class ‘0’ oil-free compressed air steady performance, and predictable ownership costs for sites that prioritise space and uptime.

It outlines the engineering choices that separate strong designs from fragile ones: water handling, rotor materials, sealing systems, and bearings. The paper also clarifies ISO 8573-1 Class ‘0’ and ISO 8573-7 requirements with practical guidance.

In this whitepaper, you will learn about:

Why compressed air purity standards matter for mission-critical lines: A concise look at ISO 8573-1 Class ‘0’ and the limits of filtration-heavy oil-lubricated systems.
Technology options compared: Dry screw and dry tooth compressors for higher kW ranges versus water-injected designs.
Water-injected fundamentals: How water acts as the sealing and cooling medium to achieve oil-free compression with simpler service requirements.
Design choices that dictate reliability: Stainless-steel rotors, triple-layer sealing, and thermal control that avoid complex Reverse Osmosis circuits.
Implementation guidance: Selecting systems that lower operational risk in pharma, F&B, and electronics with a focus on uptime and lifecycle value.

ELGi’s water-injected oil-less air compressor range is built for long-term reliability and compressed air quality assurance in demanding environments.

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