Air Compressors in the Packaging Industry

J Ll Leach is supporting the packaging industry with reliable Atlas Copco compressors, supplied and installed from our Stoke, Birmingham and Shrewsbury branches.

Compressed air isn’t an afterthought; it’s the lifeblood of your packaging line.

It’s as critical to your production process as electricity or water. From forming and filling to sealing and palletising, compressed air and vacuum systems power your packaging line. Your system’s reliability, quality, and efficiency affect uptime, operating costs, and product safety.

Selecting the right air compressor isn’t a simple equipment purchase; it’s a strategic business decision. This buying guide delivers the technical information production managers, site engineers, and QA/compliance officers need to specify a system that meets the exacting requirements of the modern food and beverage industry and packaging sector.

Why Your Choice of Compressor Matters: Applications in Packaging

Compressed air is used at nearly every stage of the packaging process, categorised generally as non-contact “power air” to drive machinery, or “active air” that directly contacts the product being packaged. Most common applications for compressed air include:

Package Creation: High-pressure air jets blow mould PET bottles in their preform shape. With the rise of rPET (recycled PET) driven by the UK Plastic Packaging Tax, pressure stability is even more critical to prevent defects. Pneumatic systems power the case erectors that make cardboard boxes.
Form-Fill-Seal (FFS): In high-speed Vertical (VFFS) or Horizontal (HFFS) lines, compressed air actuates the sealing jaws and cutting knives. Precise pressure prevents seal failures and product spoilage.
Product Handling: Pneumatic conveyors safely transport fragile items, such as snacks or cereals, without causing damage. Vacuum suction cups on robotic arms, driven by compressed air, palletise cases at high speeds with precision.
Processing and Sealing: Pneumatic controls are the most common in filling machines for precise metering. The sealing jaws that apply an airtight seal to the bag are almost always driven by compressed air.
Atmosphere Modification: On-site Nitrogen generators utilise a feed of clean, compressed air to produce nitrogen gas for Modified Atmosphere Packaging (MAP). This process prolongs the shelf life of fresh produce, coffee, meats, and other products while significantly reducing gas costs compared to bottled delivery.

Oil-Free vs Oil-Injected: Why It Matters for Packaging Compliance

The fundamental choice for any packaging application is between an oil-free and an oil-injected compressor. Understanding the difference between oil and oil-free air compressors comes down to your tolerance for the risk of oil aerosols or contamination.

For any process where air is classified as “active”, touching the product or its primary packaging, an oil-free model is the only way to eliminate risk. Only oil-free compressors, like the Atlas Copco ZR/ZT series, can deliver air certified to ISO 8573-1 Class 0, which guarantees zero risk of oil contamination at the point of use.

This is particularly vital for meeting HACCP and BRCGS Global Standards for Food Safety.

While some systems utilise an oil-injected compressor with downstream filters to produce “technically oil-free” air, this approach carries a high risk. A single filter failure can release oil directly into your production line, leading to product recalls and severe brand damage. Choosing a certified oil-free machine removes this risk entirely.

Choosing the Right Compressor for Each Packaging Application

As a leading compressed air equipment provider and official Premier Distributor for Atlas Copco, J Ll Leach has decades of experience specifying the right technology for the UK packaging industry and beyond, including food packaging, pharmaceutical, and logistics.

Atlas Copco Applications & Recommended Series
Application	Recommended Technology	Atlas Copco Series
Food/Pharma Packaging	Oil-Free, Class 0	ZR / ZT
General Pneumatics	Oil-Injected Screw	GA VSD+, GA FF
PET Bottles & rPET	High-Pressure + Booster	ZR + ZD
Labs / Quiet Rooms	Scroll / Piston	SF / LZ
Vacuum for Pick-and-Place	Variable-Speed Vacuum	GHS VSD+
Nitrogen Generation for MAP	PSA / Membrane	NGP / NGM

Oil-Free Rotary Screw (Atlas Copco ZR/ZT): The ultimate solution for critical applications where compressed air purity is vital. Variable Speed Drive (VSD) versions provide significant energy efficiency savings.
Oil-Injected Rotary Screw (Atlas Copco GA VSD+): The workhorse of compressors for general plant air to run pneumatic tools and end-of-line automation with no product contact. These units feature SMARTLINK technology for remote monitoring.
Scroll & Piston Compressors (Atlas Copco SF/LZ): Scroll and piston compressors deliver quiet, compact, and inherently oil-free air. They are ideal for labs and point-of-use applications within packaging plants.

Achieving Verified Air Quality and UK Compliance

A compressor is only one part of the system. To deliver air that is fit for purpose, a complete air treatment system and management strategy is essential.

ISO 8573-1: The Global Standard for Air Purity

This standard specifies the levels of compressed air quality, according to three contaminants: solid particles, water, and total oil. Purity classes are represented as a three-digit number (for example, 1.2.1). Class 0 is user-defined but is stricter than Class 1, requiring absolute purity. The standards must be proven at the point of use, not just at the compressor outlet. The Importance of compressed air quality and filters cannot be overstated in a regulated environment.

Common Air Quality Classes in Packaging

Class 0: For direct contact with food (food, pharma, dairy).
Class 1.2.1: For blow-moulding, MAP, and high-purity needs (Active Air).
Class 4: For general plant utility air, tools, and actuators (Power Air).

Air Treatment Equipment

Dryers: Compressed air systems naturally generate water vapour as air condenses under pressure. Refrigerated dryers are suitable for general plant air, while desiccant dryers are required to achieve the very low pressure dew points (-40°C) needed to inhibit microbial growth in food products.
Filtration: A multi-stage filtration setup, including coalescing and activated carbon filters, is needed to remove particulates and oil vapour to meet stringent air quality standards.

UK Legal Compliance

Packaging facilities must adhere to strict UK regulations and retail standards.

Pressure Systems Safety Regulations 2000 (PSSR): Most industrial air systems require a Written Scheme of Examination (WSE) to be drawn up and certified by a “Competent Person.” J Ll Leach provides this turnkey PSSR support to ensure you remain legally compliant.
BRCGS & HACCP: Under the BRCGS Global Standard (Issue 9), compressed air in direct contact with food is considered an ingredient. We provide air quality testing to ensure your system does not contaminate the final product.
Condensate Management: Condensate from compressed air often contains oil and particulates, classifying it as hazardous waste under UK regulations. You must learn how to manage Air Compressor Condensate and how to Manage It using an oil-water separator before it can be discharged legally.

How to Reduce Energy Costs in Your Packaging Operation

Compressed air can account for up to 10% of a plant’s total electricity bill. You can reduce these costs and minimise waste by implementing strategic system improvements.

Eliminate Air Leaks: A comprehensive ultrasonic leak detection survey identifies every leak in your facility. This provides a prioritised action plan to address the most costly leaks first.
Install a VSD Compressor: Variable Speed Drive (VSD) compressors automatically adjust motor speed to match actual air demand. This technology can reduce energy consumption by up to 50% during lighter production periods.
Optimise Piping (AIRnet): Replacing old galvanised piping with Atlas Copco’s AIRnet modular aluminium piping eliminates rust contamination and reduces pressure drops.
Capture Waste Heat: Energy recovery systems can capture up to 94% of the electrical energy lost as heat during compression. This thermal energy can be repurposed to pre-heat boiler feedwater or HVAC zones.

Frequently Asked Questions

Is oil-free air mandatory for food packaging?

While not strictly “mandatory” by law, it is the industry best practice for risk management. Using Class 0 oil-free air ensures you meet food safety standards (like BRCGS) and eliminates the risk of oil aerosols contaminating food products.

What compressor is best for Modified Atmosphere Packaging (MAP)?

MAP relies on high-purity nitrogen. An oil-free compressor feeding a nitrogen generator is the ideal setup to prevent oil from damaging the generator’s membrane or carbon molecular sieve.

How often should I service my packaging compressor?

To maintain regulatory compliance and uptime, a full service is recommended every 12 months, with quarterly checks on filters. We also recommend annual air quality testing to validate purity at the point of use.

Why are air leaks a major concern for packaging plants?

Leaks are often undetected due to background noise and can waste up to 30% of your total compressed air production. This forces your compressor to work harder, accelerating mechanical strain and increasing financial overhead.

How does a VSD compressor differ from a fixed-speed model?

A standard fixed-speed compressor runs at a single speed, either fully on or off wasting energy when demand varies. A VSD compressor matches its output to your real-time demand, nearly eliminating wasteful unloaded running cycles.

What are the benefits of aluminium AIRnet piping over traditional materials?

Aluminium pipes have smooth interior surfaces that maintain high air quality and reduce friction-based pressure drops. Unlike galvanised steel, aluminium is corrosion-resistant, ensuring clean air delivery for sensitive packaging processes.

What can recaptured waste heat be used for in a facility?

Thermal energy recovered from air compressors can be used for space heating in warehouses or to heat water for Clean-in-Place (CIP) washdown systems. This effectively converts a waste byproduct into a valuable resource that lowers your total energy bill.

Your Partner for High-Performance Packaging Operations

A contemporary compressed air system is an intricate and valuable asset. Specialist design, installation, and maintenance are essential. J Ll Leach offers a comprehensive package, including site audits and energy assessments, along with the complete installation of a turnkey system utilising Atlas Copco equipment, AIRnet pipework, and SMARTLINK remote monitoring, to ensure optimal energy use, performance, and predictive maintenance.

With depots in Stoke-on-Trent, Birmingham, and Shrewsbury, our experienced engineers offer proactive maintenance and 24/7 support to help keep your UK packaging lines running safely and productively. As an Atlas Copco Premier Distributor, we can provide technical excellence with a fast local response.

Contact our team today to arrange a complimentary site survey and compressed air audit. We’ll help you reduce energy costs, improve compliance, and achieve more reliable operations.