In modern surface finishing operations, energy efficiency is more than a sustainability goal – it’s a commercial necessity. Yet many facilities still depend on legacy air- operated pumps, which can be surprisingly inefficient, costly to operate, and maintenance-intensive. Rising energy prices, tighter margins, and increasing pressure to optimise performance mean engineering teams are looking for practical ways to cut energy use without compromising process quality.

The Hidden Cost of Compressed Air

Air-operated diaphragm pumps (AODDs) are widely used in surface finishing because they can safely transfer aggressive fluids such as hydrochloric acid pickling solutions and surfactant-containing cleaners, across a broad range of viscosities and temperatures. However, their reliance on compressed air introduces significant inefficiencies. With operating efficiencies often as low as 10–15%, a large portion of energy is lost during operation. Generating compressed air is expensive, and issues such as moisture-related icing, noise, and complicated maintenance can increase the true lifecycle cost of these pumps. Many facilities continue to use them simply because they are familiar – not because they are efficient.

Transferable Lessons from a Real-World Upgrade

A recent engineering project conducted by CDR Pumps demonstrates the measurable impact of replacing AODDs with electric diaphragm pumps. While the project was conducted for a national corrugated cardboard manufacturer, the lessons are fully transferable to surface finishing operations: significantly improved energy efficiency and reduced maintenance, while maintaining reliability in chemical handling applications.

CDR Pumps initially conducted a detailed engineering assessment, evaluating air consumption, energy use, and operational performance. Following successful trials, seven AODDs at one manufacturing site were replaced with QUANTMTM electric pumps. The proven performance and efficiency gains led to a wider rollout, ultimately resulting in the installation of 96 QUANTMTM pumps across all UK manufacturing sites.

Measurable Results

Energy use was monitored using direct measurements – air consumption for the AODDs and kilowatt usage for the QUANTM^TM pumps – confirming substantial efficiency improvements:

• Average saving of 7.5 kWh per pump – translating to 334,687 kWh saved annually across the pilot site
• Annual energy costs reduced by c. £80k across the pilot site
• When rolled out across all manufacturing sites – significant energy savings of c. £1 million within a single year

Operational benefits were equally compelling. Eliminating compressed air removed icing issues, noise was reduced, and fewer moving parts simplified maintenance. Importantly, thanks to their matching footprints, the pumps were installed quickly with minimal adjustments or disruption to operations.

Beyond Equipment — An Engineering Partnership

Focused engineering-led assessments often reveal straightforward opportunities to reduce energy use and improve performance. CDR Pumps guides manufacturers through every stage – from initial enquiry and performance analysis to installation and ongoing support – helping facilities adopt more efficient pumping solutions.

Take the Next Step

If your surface finishing operations rely on air-operated pumps, substantial savings could be within reach.

Contact CDR Pumps today on 01933 674777 or at sales@cdrpumps.co.uk to discuss how your facility can reduce energy costs, improve reliability, and achieve measurable efficiency gains.