AirSpace Medium-Pressure and PET Blowing Screw Air Compressor Series (30 HP to 200 HP, 25 bar to 40 bar) delivers high-pressure pneumatic stability and contamination-free performance engineered specifically for high-speed stretch blow molding and industrial pressure testing. By pairing a robust primary screw stage with a heavy-duty reciprocating booster architecture, this series eliminates the pressure drops and energy waste common in legacy auxiliary setups. Operating under ISO 8573-1 Class 0 integrity standards, these units provide the precise 25 to 40 bar working pressure required for beverage bottling, edible oil packaging, and high-pressure component validation.
Engineering Summary and Executive Verdict
For industrial packaging plants and bottling facilities, selecting the correct high-pressure air architecture dictates both operating margin and container quality. AirSpace Machinery addresses this with integrated medium-pressure compressor and booster packages ranging from 22 kW to 160 kW. Backed by CE and ISO 9001 quality standards and 100 million yuan annual sales, our systems guarantee stable 25–40 bar output with a 35 percent energy delta compared to conventional legacy multi-stage setups.
Key Technical Specifications At-a-Glance
- Power Range: 30 HP to 200 HP (22 kW to 160 kW)
- Working Pressure: 25 bar to 40 bar (362 to 580 psi)
- Flow Capacity (FAD): 3.5 m³/min to 25.0 m³/min (123 to 883 CFM)
- Motor Efficiency: Permanent Magnet Variable Frequency (PMV) / IE5 ultra-premium efficiency drive options
- Air Purity Option: ISO 8573-1 Class 0 oil-free configurations for food and pharmaceutical grade PET packaging
- Duty Cycle: 100 percent continuous industrial duty rated for 24/7 manufacturing operations
Core Architectural Features of the AirSpace Medium-Pressure Series
Two-Stage Screw and Booster Integration
Traditional high-pressure setups require separate low-pressure compressors feeding external, uncoordinated booster pumps. AirSpace integrates a precision primary screw compression stage with a heavy-duty reciprocating booster block inside a unified control framework. This eliminates pressure surging, reduces floor space requirements by 40 percent, and coordinates inter-stage cooling seamlessly.
Precision 25 to 40 Bar Working Pressure Regulation
PET bottle preform stretching and final blowing require exact pressure thresholds to prevent wall thinning or container burst defects. Our internal closed-loop pressure sensors maintain delivery pressure within a +/- 0.1 bar tolerance, ensuring consistent gram weight and structural integrity across high-speed rotary blow molders.
Specialized Intercooling and Thermal Management
Operating continuously at 40 bar generates intense thermal loads. Each unit incorporates oversized multi-stage copper-tubed intercoolers and aftercoolers, reducing compressed air temperature to within 10°C of ambient before it enters desiccant drying and filtration trains. This protects downstream pneumatic valves and mold seals from thermal degradation.
Contamination-Free Class 0 Air Purity
For food, beverage, and pharmaceutical packaging, oil carryover ruins entire production batches. Our oil-free medium-pressure models utilize grease-packed bearings separated by labyrinth seals and atmospheric vents, guaranteeing 100 percent oil-free air delivery certified under ISO 8573-1 Class 0 standards.
Comparison Table: Standard 8-Bar Setup vs Integrated Medium-Pressure Screw + Booster Package
| Performance Metric | Standard 8-Bar Compressor + External Booster | AirSpace Integrated Medium-Pressure & Booster Package |
|---|---|---|
| System Architecture | Disjointed multi-vendor compressor and booster | Unified factory-engineered single skid system |
| Energy Efficiency | High losses due to inter-stage pressure drop | Optimized 35% energy delta via PMV drive & matched booster |
| Pressure Stability | Fluctuating feed pressure causing container defects | Exact +/- 0.1 bar regulation across 25–40 bar range |
| Footprint & Installation | Requires complex piping, dual wiring, large floor area | Compact modular skid design, plug-and-play installation |
| Air Purity Compliance | Risk of oil contamination without costly external scrubbers | ISO 8573-1 Class 0 oil-free options for food-grade safety |
| Maintenance Overhead | High downtime due to mismatched service intervals | Synchronized maintenance intervals with IoT diagnostic logging |
Comprehensive Model Specification Table
| Model Designation | Motor Power (HP / kW) | Working Pressure (bar / psi) | Capacity FAD (m³/min / CFM) | Drive Type / Cooling | Net Weight (kg) |
|---|---|---|---|---|---|
| ASP-MP30 | 30 HP / 22 kW | 30 bar / 435 psi | 3.6 m³/min (127 CFM) | PMV VSD / Air-Cooled | 1,250 kg |
| ASP-MP50 | 50 HP / 37 kW | 30 bar / 435 psi | 6.2 m³/min (219 CFM) | PMV VSD / Air-Cooled | 1,680 kg |
| ASP-MP75 | 75 HP / 55 kW | 35 bar / 507 psi | 9.4 m³/min (332 CFM) | PMV VSD / Water-Cooled | 2,150 kg |
| ASP-MP100 | 100 HP / 75 kW | 40 bar / 580 psi | 13.5 m³/min (477 CFM) | PMV VSD / Water-Cooled | 2,800 kg |
| ASP-MP150 | 150 HP / 110 kW | 40 bar / 580 psi | 19.0 m³/min (671 CFM) | PMV VSD / Water-Cooled | 3,650 kg |
| ASP-MP200 | 200 HP / 160 kW | 40 bar / 580 psi | 25.0 m³/min (883 CFM) | PMV VSD / Water-Cooled | 4,500 kg |
Application Suitability Across Heavy Industries
PET Bottle Blowing (Beverage, Edible Oil, and Cosmetics Packaging)
High-speed rotary blow molders demand instantaneous high-pressure air bursts at 30 to 40 bar. Our medium-pressure compressors maintain large receiver volumes and rapid response times, ensuring zero pressure starvation during multi-cavity mold cycles. For operations requiring specialized packaging environments, explore our dedicated Food & Pharma Solution <BLOG_POST:3f3f6411-6853-4867-b453-8d46eadd171a> and our Injection Molding Solution <BLOG_POST:8f458532-0bbb-4707-beab-bad119693ac0> for auxiliary plant air coordination.
High-Pressure Pipeline and Pressure Vessel Testing
Manufacturing facilities and engineering test benches require sustained 25 to 40 bar test pressures to validate valves, hoses, and pressure vessels. The continuous heavy-duty rating and precise throttling control of the AirSpace medium-pressure series provide stable test pressures without thermal overload.
Frequently Asked Questions (FAQ)
What exact working pressure is required for PET bottle blowing?
PET stretch blow molding typically requires plant service air at 7 to 8 bar for machine pneumatics, pre-blow air at 10 to 25 bar for initial preform stretching, and final high-pressure blowing at 25 to 40 bar depending on container wall thickness and volume. Standard CSD bottles utilize 25 to 35 bar, while heavy-duty or hot-fill containers approach 40 bar.
Should I choose a booster system or a dedicated high-pressure compressor?
If your facility already operates an efficient plant air network at 7 to 10 bar, adding a high-pressure booster compressor is significantly more capital-efficient and energy-saving than running a standalone high-pressure multi-stage compressor. Our integrated packages combine primary screw air supply with matched booster stages for optimal efficiency.
Are these compressors certified oil-free for food and beverage packaging?
Yes. AirSpace offers both oil-injected medium-pressure units with multi-stage high-efficiency filtration and certified Class 0 oil-free screw models. For food-contact PET bottles, our oil-free configuration guarantees zero hydrocarbon contamination in compliance with ISO 8573-1 standards.
How does the system maintain pressure stability during fluctuating mold demands?
The variable frequency drive (VSD) combined with intelligent PLC control monitors receiver pressure in real time. It automatically modulates motor speed and booster intake valves to match instant preform consumption, eliminating pressure droop.
What is the standard delivery lead time and export support?
Lead times depend on specific power configurations and cooling options (air vs water-cooled). AirSpace provides complete CE and ISO 9001 export documentation, rugged crating, and global logistics support. Please contact our engineering team for exact shipping schedules.
Download Product Documentation
To review full technical drawings, electrical schematics, and dimension tables, please access our official equipment library via the AirSpace Catalog Download Portal.
If you need air consumption calculation, energy-saving scheme and factory quotation, please send us an inquiry.
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