How to Reduce Pressure Drop in a Compressed Air System

Pressure drop is a common problem in compressed air systems and can have a significant impact on efficiency, productivity and operating costs.

When pressure falls between the compressor and the point of use, equipment may not receive the pressure it needs to operate correctly. The natural reaction can be to increase compressor pressure, but this can increase energy consumption without addressing the underlying problem.

At PCM Engineering, we help businesses identify and resolve compressed air system issues, from leaks and restrictive pipework to poorly sized components and inefficient system layouts.

What Causes Pressure Drop?

Pressure drop occurs as compressed air travels through pipework, hoses, fittings, filters and other components.

Some pressure loss is unavoidable, but excessive pressure drop can indicate that the distribution system needs attention.

Common causes include:

Undersized Pipework

Pipework that is too small for the required airflow can restrict the system and increase pressure loss.

As air demand increases, this restriction becomes more noticeable and can result in inadequate pressure reaching machinery and pneumatic equipment.

Correctly sizing compressed air pipework for both current and future demand can significantly improve system performance.

Compressed Air Leaks

Leaks waste compressed air before it reaches the point of use.

Even relatively small leaks throughout a factory or workshop can contribute to reduced system pressure while forcing the compressor to work harder to maintain demand.

Regular leak detection and repair can therefore improve both pressure stability and energy efficiency.

Restrictive Fittings and Couplings

Every fitting, valve, coupling and connection creates some resistance to airflow.

Poorly sized components, unnecessary bends and restrictive fittings can create bottlenecks within the system.

Selecting components with appropriate flow capacities helps compressed air move efficiently throughout the network.

Blocked or Poorly Maintained Filters

Compressed air filtration is essential for protecting downstream equipment, but contaminated or blocked filter elements can restrict airflow.

Regular inspection and replacement of filter elements helps maintain air quality without creating excessive pressure loss.

Long or Poorly Designed Pipe Runs

Long pipe runs, excessive bends and poorly designed distribution systems can all contribute to pressure drop.

A well-designed ring main can provide compressed air from multiple directions, helping maintain more consistent pressure across larger industrial sites.

How Can Pressure Drop Be Reduced?

Reducing pressure drop usually starts with assessing the complete compressed air system rather than simply increasing compressor pressure.

This may include checking for leaks, measuring pressure at different points in the system, inspecting filters and fittings, reviewing pipe diameters and identifying areas where the distribution network could be improved.

Modern aluminium compressed air pipework can also provide an efficient alternative to ageing or restrictive installations, offering smooth internal surfaces, corrosion resistance and flexible system design.

Why Increasing Compressor Pressure Isn’t Always the Answer

If equipment is suffering from low pressure, increasing the compressor set point can appear to be an easy solution.

However, producing compressed air at a higher pressure requires additional energy. If the real problem is a leak, restriction or poorly designed distribution system, increasing compressor pressure may simply increase operating costs while leaving the underlying fault unresolved.

Finding and correcting the source of the pressure loss is usually the more efficient long-term approach.

Compressed Air System Support from PCM Engineering

PCM Engineering supplies, installs and maintains compressed air equipment and pipework for businesses across Belfast, Northern Ireland and throughout the UK.

Whether you’re experiencing pressure problems, planning a new compressed air installation or looking to improve the efficiency of an existing system, our team can help assess your requirements and recommend a suitable solution.

Need help improving your compressed air system?

Contact PCM Engineering to discuss compressed air pipework, compressor servicing, leak detection, pneumatic components and system upgrades.

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