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Compressed Air Predictive & Preventative Maintenance Strategies

​Keith Atkinson, EMEAI Sales Manager at Gardner Denver, advises on the most effective predictive and preventative maintenance strategies for compressed air users.

​Keith Atkinson, EMEAI Sales Manager at Gardner Denver

Keith Atkinson, EMEAI Sales Manager at Gardner Denver

Businesses of all sizes have become increasingly wary of purchasing a compressed air system that’s available for a lower upfront cost, only for issues to arise further down the line that means any savings originally realised have been lost on service and maintenance costs.

As a result, owners are moving away from considering the initial purchase price for a piece of equipment alone and starting to focus more on whole life costs.

Servicing and maintenance costs are no longer seen as separate entities, but rather parts of a greater whole.

Effective maintenance strategies can help businesses save money, improve operational efficiencies, reduce downtime, increase productivity and deliver peace of mind.

What, then, are the most effective strategies that compressed air users can implement?

Compressed Air Predictive & Preventative Maintenance Strategies

The real cost of using non-genuine compressed air system parts

Non-genuine spare parts and lubricants are typically cheaper than a manufacturer’s original parts and, when trying to cut back on costs, it can be tempting to opt for these.

Nevertheless, it is widely accepted that using non-genuine parts can be detrimental to a compressed air system’s overall performance and can have a negative impact on a machine’s efficiency and energy consumption.

In some cases, the wrong spare part can cause real damage. This can potentially result in the system failing completely. The outcome? Not only an expensive repair bill, but costly unexpected downtime too.

Of course, any compressed air system – whether a new or existing one – will need components such as filters, valves, seal and oil to be periodically replaced. But by replacing these with a non-genuine alternative, there can be no guarantee that the manufacturer’s warranty will be upheld.

Genuine parts will have been manufactured to meet the same standards as the compressor that they are intended for. So, they will have passed the manufacturer’s stringent testing regimes, in a quality-controlled environment, to ensure your system continues to operate reliably.

Components to be particularly mindful of are filters and seals. Filters ensure dust and particles cannot enter the compressor system, helping to protect components from unnecessary corrosion and wear.

This encompasses everything from the pipework that carries the compressed air around the plant to the equipment at the point of use.

Non-genuine filters are more likely to have a reduced dust and dirt-holding capacity, resulting in more contaminants entering the system. 

Meanwhile, seals are designed to handle compressor oil, high temperatures over prolonged periods and varying pressure levels. These provide protection against the ingress of dirt and other contaminants, and therefore should be selected carefully to ensure efficiency levels are maintained.

The same is true of genuine lubricants, which are formulated with additives to improve performance and optimised to work with all of the system’s component parts. This ensures that the correct lubrication, cooling and anti-wear qualities are maintained.

If specified incorrectly, the lubricant can place extra demands on the filter element, which can result in dust and other particles coming into contact with internal compressor components.

Furthermore, using the right lubricants and filters can help to extend oil change intervals. This not only reduces the cost and frequency of oil changes but helps to, reduce the environmental impact associated with oil disposal too.

Compressed Air Predictive & Preventative Maintenance Strategies

Minimising pipework leaks, maximising profit

Did you know industry averages suggest energy costs represent over 80 per cent of a compressor’s whole life costs? As such, operators need to make sure performance is not being affected by any issues such as pipework leakages.

Pipework leakages are a large factor in compressed air energy wastage, accounting for 35 per cent of total air consumption. There are many reasons for leaks in a compressed air system, including shut-off valves and manual condensate valves being left open, and leaking hoses, couplings, pipes, flanges and pipe joints.

Such oversights and deterioration can be expensive. According to the Carbon Trust, just one 3mm leak could cost a company over £700 a year in wasted energy.

Data-logging equipment can help pinpoint inefficiencies, identify any compressed air leaks and manage equipment performance. In the case of pipework leakages, using a flow meter is a reliable method of evaluating compressed air generation and downstream inefficiency costs.

Indeed, finding and repairing one 3mm leak could potentially save enough money to cover the cost of purchasing one.

It might also be worthwhile carrying out an energy audit, which can deliver a range of benefits to help ensure compressed air operations are maintained to a suitably high standard.

A pre-assessment survey would be undertaken in the first instance, which would consider a range of variable factors that might affect compressed air usage.

This would include: compressor kW sizes; the flow, pressure dew point, pressure and temperature required; the time needed to perform a leak survey; shift patterns; cost of electricity on site; and any obvious signs of leaks.

From here, it can be assessed whether an energy audit would be worthwhile undertaking. For an example, a typical report from we would include an overview of the compressed air system, a power and flow report, temperature data, an air leakage survey, a report on any pipework issues, potential energy-saving opportunities, and a proposal on how to implement these recommendations. 

Compressed Air Predictive & Preventative Maintenance Strategies

Smart digital insights improve compressed air performance

With Industry 4.0 driving companies to share and analyse data every step of the way, this is creating a real opportunity for compressed air users to consider how data can improve performance and help identify and inefficiencies.

One of the biggest changes in Industry 4.0 is the move from closed, proprietary products to open ones. Traditionally, a product operates and connects to a brand’s own proprietary protocols and data transfer mechanisms.

This closed system can be problematic for those using compressors. Most businesses, over time and throughout various product lifecycles, will have purchased units from a range of brands.

To meet this need, we have introduced a new digital platform, iConn. iConn is a cloud-based, air management platform, which has been developed to deliver advanced analytics, enabling you to stay in control of your compressed air installation.

The system provides historic, real-time, predictive and cognitive analytics, allowing users to rectify potential issues before they happen.

Crucially, iConn is an open platform, supporting ancillary and compressed air products from other brands. iConn can help provide a platform that delivers truly meaningful compressed air insights, no matter who the manufacturer is.

Process Industry Informer

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