How Vacuum Packaging Protects Food Safety and Freshness

Every day, millions of tons of food are produced, transported, and consumed around the world. Behind this massive global supply chain is a critical technology that most consumers never see: vacuum packaging.

Vacuum packaging extends shelf life, preserves nutritional value, prevents contamination, and reduces food waste. At the heart of every vacuum packaging machine is a vacuum pump – the unsung hero that makes it all possible.

Oil-lubricated rotary vane vacuum pumps are the standard in vacuum packaging, achieving vacuum levels of 0.1 mbar. They are the backbone of the food packaging industry, delivering the reliable, consistent vacuum performance that food safety demands.

This article explores how vacuum technology – particularly oil-sealed rotary vane pumps like Wordfik's PVX series – protects food safety and freshness from farm to table.

Food spoilage is caused by three primary factors:

Vacuum packaging removes oxygen from the package, creating an environment that:

• Inhibits growth of aerobic bacteria and mold

• Prevents oxidation of fats, oils, and vitamins

• Extends shelf life by 3-5 times compared to conventional packaging

• Preserves nutritional value of food products

• Reduces food waste throughout the supply chain

• Food waste accounts for approximately one-third of all food produced globally

• Vacuum packaging can reduce food waste by 50-80% for many perishable products

• Extended shelf life means less product loss at retail and in the home

1. Product Placement: Food product is placed in a packaging film or bag

2. Air Evacuation: Vacuum pump removes air from the package

3. Sealing: Package is hermetically sealed under vacuum

4. Quality Check: Package is inspected for seal integrity

The vacuum pump is the heart of the packaging machine. It must:

• Achieve target vacuum within the machine's cycle time

• Maintain stable vacuum throughout the sealing process

• Handle continuous operation in high-speed production lines

• Deliver consistent performance day after day

Oil-sealed rotary vane pumps are the most widely used vacuum technology in food packaging for several reasons:

Deep Vacuum Capability

Oil-sealed rotary vane pumps achieve ultimate pressures as low as 0.5 mbar (single-stage) and even lower with two-stage configurations. This deep vacuum is essential for removing virtually all oxygen from packages, maximizing shelf life.

Proven Reliability

Oil-sealed rotary vane pumps have been the workhorse of the packaging industry for decades. They are trusted by packaging machine manufacturers worldwide for their consistent, dependable performance.

Cost-Effectiveness

Compared to dry vacuum technologies, oil-sealed rotary vane pumps offer a lower initial investment and proven reliability, making them the most economical choice for many packaging applications.

High Pumping Speed

Packaging machines operate on tight cycle times. Oil-sealed rotary vane pumps deliver the high pumping speeds needed to achieve target vacuum quickly, maximizing production throughput.

Continuous Duty Capable

Packaging lines often run 24/7. Oil-sealed rotary vane pumps are built for continuous operation in demanding industrial environments.

Gas Ballast Valve

Allows the pump to handle moisture and condensable vapors that may be present in food packaging applications.

Oil Mist Separator

Ensures clean exhaust, preventing oil mist from contaminating the production environment.

Anti-Suck Back Valve

Prevents oil from flowing back into the packaging machine during power interruptions, protecting both the product and the pump.

Wordfik's PVX series oil-sealed rotary vane vacuum pumps are specifically designed to meet the demanding requirements of food packaging applications.

For specific packaging applications, Wordfik offers:

PVDT Series (Dual-Inlet)

• Two separate suction ports for servicing multiple production lines

• Ideal for facilities with multiple packaging machines

Multi-Pump Vacuum Systems

• Pre-assembled, pre-piped modular systems

• 1-3 pumps configurations for scalability

• Intelligent pump sequencing for energy efficiency

Consistent vacuum levels ensure uniform sealing across all packages. This means:

• Fewer leakers and returns

• Consistent product appearance

• Extended shelf life across all packages

• Higher customer satisfaction

Modern vacuum pumps deliver faster pump-down times, enabling shorter cycle times and higher throughput. In packaging operations, faster cycle times mean:

• More packages per hour

• Lower cost per package

• Higher return on equipment investment

Energy-efficient vacuum pumps can dramatically reduce operating costs. Up to 50% energy savings are possible with variable speed drive technology. During breaks, Eco-mode can reduce energy use by an astonishing 94%.

Oil-sealed rotary vane pumps with advanced design features require less frequent maintenance, reducing downtime and labor costs.

A major dairy producer switched from five individual vacuum pumps to a single central vacuum system:

A thermoforming packaging facility replaced four conventional oil vane pumps with a modern efficient alternative:

At the DMK Group's largest cheese production site, a new vacuum system delivered:

• One vacuum pump instead of five

• More than 50% energy savings

• Significantly reduced maintenance costs

Atlas Copco vacuum pumps enabled an Italian food packaging machine manufacturer to:

• Achieve better packaging speeds and cycle times

• Explore new levels of vacuum efficiency with Industry 4.0 capabilities

• Higher productivity across the packaging line

Vacuum packaging plays a critical role in meeting food safety regulations. Proper vacuum packaging:

• Reduces pathogen growth by removing oxygen

• Prevents cross-contamination through hermetic sealing

• Extends shelf life safely without preservatives

• Maintains cold chain integrity through reduced moisture loss

For dairy and food processing applications, equipment must meet 3-A Sanitary Standards. Wordfik vacuum pumps are designed to meet these rigorous requirements, ensuring:

• Cleanable surfaces

• No product contamination

• Compliance with food safety regulations

While vacuum packaging is the most visible application, vacuum pumps play critical roles throughout the food industry:

• Vacuum conveying – Moving ingredients and finished products

• Vacuum drying – Removing moisture from heat-sensitive foods

• Vacuum cooling – Rapid cooling of cooked products

• Modified Atmosphere Packaging (MAP) – Replacing air with protective gases

1. Pumping Speed

Must be sufficient to achieve target vacuum within the machine's cycle time.

2. Ultimate Vacuum

Must be deep enough for the specific packaging application. Most packaging requires 0.5-10 mbar.

3. Duty Cycle

Must match the machine's operating schedule – intermittent or continuous.

4. Maintenance Requirements

Consider the cost and frequency of maintenance, including oil changes and vane replacement.

5. Energy Efficiency

Consider both initial cost and lifetime energy consumption.

Wordfik offers:

• Complete product range – from 40 m³/h to 360 m³/h

• Proven reliability – trusted by packaging machine manufacturers worldwide

• Expert support – selection assistance and system design

• Global service – after-sales support in over 80 countries

From farm to table, vacuum packaging protects the safety and freshness of the food we eat. At the heart of this essential technology is the oil-sealed rotary vane vacuum pump – a proven, reliable, and cost-effective solution that has served the food packaging industry for decades.

Wordfik's PVX series offers food packaging manufacturers:

• Deep vacuum down to 0.5 mbar for maximum shelf life

• Right-sized pumping speeds for any packaging application

• Energy-efficient operation to reduce operating costs

• Proven reliability for 24/7 continuous operation

• Expert support from selection to after-sales

Whether you're packaging fresh produce, dairy products, meat, or processed foods, Wordfik has the vacuum solution to help you protect food safety, extend shelf life, and reduce operating costs.