ZS (VSD(+)) oil-free screw blowers
Compressed Air Blowers
Description & Features
Atlas Copco’s ZS (VSD+) is a series of highly efficient, positive-displacement, oil-free rotary screw blowers designed to deliver reliable low-pressure compressed air. Certified ISO 8573-1 Class 0, they guarantee 100% pure, oil-free air for critical processes where contamination risks could ruin products or disrupt manufacturing. These units integrate advanced internal compression screw technology with Variable Speed Drive (VSD+) modifications to achieve up to 35% to 40% higher energy savings compared to conventional rotary lobe (Roots) blowers.
Technical Specifications Quick-View
For exact operating ranges, refer to Atlas Copco’s Blower Product Catalog:
| Specification | Operational Range |
|---|---|
| Working Pressure | 0.3 bar(e) to 1.5 bar(e) (or up to -0.65 bar(g) for vacuum) |
| Capacity (FAD Flow) | 64 l/s to 3,264 l/s (230 m³/h to 9,100 m³/h) |
| Installed Motor Power | 18 kW to 355 kW |
| Oil-Free Certification | ISO 8573-1 Class 0 (2010) |
Key Features and Innovation
1. Advanced Permanent Magnet Motor & VSD+ Technology
- IE4 Efficiency Level: The ZS VSD+ combines an in-house developed Permanent Magnet (PM) motor with a specialized liquid-cooled jacket to sustain optimal operation.
- Neos VSD Inverter: Smoothly scales the blower speed up or down to align with fluctuating air demand, preventing standard start-up spikes and minimizing energy waste.
- Constant Efficiency: Unlike standard machines, screw technology retains high air-compression efficiency levels across different operating speeds.
2. Superior Mechanical Reliability
- Durably Coated Rotors: The precision-engineered screw elements use specialized coatings to secure minimal operational clearance and reduce wear over time.
- Direct Drive Design: Eliminates belts or pulleys, resulting in fewer moving parts, less mechanical strain, and significantly reduced total cost of ownership.
- Harsh Environment Ready: Features an IP66-rated, fully enclosed motor housing alongside high-tier cooling layouts that withstand dust, moisture, and extreme industrial temperatures.
3. Optimized Cool Oil & Airflow Architecture
- Tuned Smart Lubrication: An integrated oil pump, driven directly by the drive shaft, sprays targeted amounts of filtered, cool oil straight to the bearings and gears.
- Intelligent Cooling Baffles: The canopy structure pulls fresh air from the rear, running it through optimized sound-attenuating baffles and standard oil coolers before exhausting out the top.
- Acoustic Silencing: Features a specialized discharge silencer that drops system pulse levels, lowering overall operational noise to as little as 75 dB(A).
4. Plug-and-Play All-In-One Package
- Ready-To-Run Assembly: Units ship fully equipped with a built-in air filter, check valve, blow-off valve, discharge silencer, and integrated converter.
- Elektronikon® Controller: Features a PLC-based electronic control module to continuously monitor vital operating parameters, protect your processes, and track maintenance cycles.
Core Applications
These low-pressure screw blowers are primarily deployed across Atlas Copco Industrial Frameworks including:
- Wastewater Treatment: Continuous aeration tank basins.
- Pneumatic Conveying: Safely moving powders, grains, and dry bulk materials.
- Fermentation Processes: Maintaining high-purity biological environments in pharma or food processing.
- Non-woven Textiles: Air-shaping fiber distribution systems.
Benefits
The ZS (VSD+) oil-free screw blowers by Atlas Copco offer superior energy efficiency (saving up to 30-40% compared to traditional lobe blowers), certified Class 0 oil-free air, and reliable, 24/7 continuous operation. These blowers significantly lower your total cost of ownership through minimal maintenance needs and optimized output across varying pressure requirements.
Key benefits of the ZS and ZS VSD(+) series include:
- High Energy Efficiency: By utilizing internal compression, screw blowers transfer significantly less energy to heat. Adding the Variable Speed Drive (VSD) adjusts the motor speed to match air demand, maintaining high efficiency over a wide range and reducing power consumption up to 40%.
- Class 0 Certified Oil-Free Air: This guarantees 100% pure, contaminant-free air, which is critical for sensitive applications in industries like wastewater treatment, food and beverage, and pneumatic conveying.
- Lower Total Cost of Ownership (TCO): Energy costs account for roughly 80% of a blower’s lifecycle cost. The massive energy savings coupled with reduced mechanical stress and fewer wear components result in a very fast return on investment.
- Smart VSD(+) Technology: Minimizes energy losses during the start-up phase and eliminates blow-off air waste.
- Reliability: Built for heavy-duty, robust operation in harsh industrial environments (up to 50°C ambient temperatures), with extended warranties (up to 5 years) on the screw element.
- Low Noise Levels: Refined internal acoustics and damping keep noise as low as 75 dB(A), making them suitable for indoor, operator-friendly environments.
