PET Bottle Blowing Compressed Air Solutions
PET bottle blowing is widely used in the food and beverage packaging industry, especially for carbonated drinks, bottled water, juice, tea beverages, and edible oils. PET bottles are also used in pharmaceuticals, chemicals, and personal care packaging.
The bottle manufacturing process relies on high pressure compressed air to expand heated PET preforms into molds. Therefore, the quality, pressure stability, and purity of compressed air are critical factors affecting production efficiency and bottle quality. 
ADEKOM provides oil-free high pressure air compressor systems specifically designed for PET bottle blowing machines, ensuring stable pressure supply, clean air quality, and high energy efficiency for modern bottle production lines.

PET Bottle Blowing Process and Air Pressure Requirements
The PET blow molding process normally includes two blowing stages:
Primary Blow
Pressure: 10 – 12 bar
Compressed air expands the heated preform to around 70–80% of the final bottle shape.
Secondary Blow
Pressure: 35 – 40 bar
High-pressure air completes the final bottle forming process to achieve the required shape and strength.
Cooling Blow (Hot-Fill Bottles)
Pressure: 35 – 40 bar
For hot-fill applications, an additional cooling step is required to reduce bottle temperature and maintain structural stability. 
Because of these requirements, PET blow molding systems must provide stable medium-to-high pressure compressed air with large flow capacity.

Why Compressed Air Quality Matters in PET Blow Molding
Compressed air quality directly impacts product appearance, yield rate, and production cost.
Poor air quality can cause several problems:
Insufficient pressure

• bottle deformation
• unclear bottle shape
• orange peel surface defects

Air contamination

• particles may cause surface spots or pitting
• oil contamination can affect food safety

Moisture in compressed air

• water stains on bottles
• hygiene and packaging risks

Excessive pressure

• preform bursting during blowing
• increased production waste

For beverage packaging applications, compressed air should meet ISO 8573-1 Class 0 oil-free air quality standards to ensure product safety and hygiene.

Oil-Free High Pressure Air Compressor for PET Bottle Blowing
ADEKOM has developed oil-free screw + piston tandem compressors specifically for PET bottle blowing applications.
The system integrates:

• Oil-free screw compressor technology
• Oil-free piston booster technology
• High efficiency permanent magnet VFD motor
• Integrated compressed air treatment system

This configuration provides stable high pressure air up to 40 bar while maintaining completely oil-free air quality.
Key Performance Specifications

• Flow range: 4 – 30 Nm³/min
• Discharge pressure: up to 4.0 MPa (40 bar)
• Air quality: ISO 8573-1 Class 0 Oil-Free
• Energy savings: up to 20% with VFD control

Advantages of ADEKOM PET Blowing Compressor System
Compared with traditional piston compressors, ADEKOM systems offer several advantages:
100% Oil-Free Air
Ensures clean compressed air for beverage and food packaging production.
High Energy Efficiency
Permanent magnet variable frequency motors reduce energy consumption.
Stable High Pressure Supply
Consistent pressure improves bottle molding accuracy and production efficiency.
Low Vibration Design
Foundation-free installation reduces installation costs and simplifies system layout.
Low Maintenance
Optimized piston structure reduces wear parts and maintenance frequency.

Recommended Compressed Air System Configuration
For high-capacity PET bottle blowing production lines, ADEKOM recommends the following compressed air system configuration:

• Oil-free screw compressor (base air supply)
• Oil-free piston booster compressor (high pressure air)
• Refrigerated air dryer
• Desiccant dryer (optional for low dew point)
• high efficiency compressed air filters
• air receiver tank

This configuration ensures:

• stable high pressure air supply
• clean oil-free compressed air
• improved energy efficiency
• reliable operation for high-speed bottle blowing machines

PET bottle blowing requires clean, stable, and high-pressure compressed air systems. ADEKOM’s oil-free screw-piston compressor solutions provide reliable air supply for high-speed PET bottle manufacturing while meeting the strict hygiene standards of the food and beverage industry.
With advanced compressor technology, energy-efficient design, and customized system solutions, ADEKOM helps manufacturers improve production efficiency, product quality, and operational reliability.

Sopragem de Garrafas PET / Soplado de Botellas PET / نفخ زجاجات PET（أو: عملية تشكيل زجاجات PET بالنفخ）