Tel: +0086-180-175-638-21
Home > Blog > What is a 2-Stage Air Compressor?

What is a 2-Stage Air Compressor?

What Defines a Two-Stage Screw Air Compressor?

When it comes to industrial applications requiring efficient and reliable compressed air, two-stage air compressors, such as DEHAHA Two-stage PM VSD Screw Air Compressor, stand out as an excellent choice. These sophisticated machines offer superior performance, enhanced energy efficiency, and greater durability compared to their single-stage counterparts. In this comprehensive article, we will delve into the intricacies of two-stage air compressors, exploring their design, functionality, benefits, and specific features that set them apart.

Understanding Two-Stage Air Compressors

DEHAHA PM Two Stage Screw Air Compressor 100Hp 8 Bar IP65 Energy Saving
DEHAHA PM Two Stage Screw Air Compressor 100Hp 8 Bar IP65 Energy Saving

How Does a Two-Stage Screw Air Compressor Work?

A two-stage screw air compressor compresses air in two distinct stages, unlike a single-stage compressor which completes the compression in one step. The process in a two-stage compressor can be broken down into the following phases:

  1. Initial Compression: Air is drawn into the compressor and compressed to an intermediate pressure level.
  2. Intercooling: The compressed air is passed through an intercooler, where it is cooled down. This step reduces the temperature of the air, making it denser and easier to compress in the second stage.
  3. Secondary Compression: The cooled air is then compressed further to reach the final desired pressure level.
  4. Delivery: The fully compressed air is delivered to the storage tank or directly to the application point.

This two-step process has several advantages:

  • Efficiency: By cooling the air between compression stages, the compressor can perform more efficiently, as cooler air requires less energy to compress.
  • Energy Savings: The DEHAHA Two-stage PM VSD Screw Air Compressor achieves nearly 15% energy savings due to its efficient design.
  • Reduced Wear and Tear: Lower temperatures and balanced workload reduce the strain on components, enhancing the compressor’s lifespan.

Key Components of a Two-Stage Screw Compressor

A typical two-stage screw compressor consists of the following key components:

  • Air Intake: The entry point for atmospheric air into the compressor.
  • First Stage Compressor: The initial compression unit that compresses the air to an intermediate pressure.
  • Intercooler: A heat exchanger that cools the compressed air between the first and second stages.
  • Second Stage Compressor: The unit that further compresses the cooled air to the final pressure.
  • Storage Tank: A reservoir for storing compressed air until it is needed.
  • Control System: An intelligent control unit, such as the touchable LED controller in the DEHAHA model, that monitors and regulates the compressor’s operations.

Benefits of Two-Stage Screw Air Compressors

Dehaha Rotary Screw Compressor PM VSD Type Compressor Industrial Two Stage Screw Air Compressors
Dehaha Rotary Screw Compressor PM VSD Type Compressor Industrial Two Stage Screw Air Compressors

Enhanced Efficiency and Energy Savings

One of the most significant benefits of two-stage screw air compressors is their enhanced efficiency. The DEHAHA Two-stage PM VSD Screw Air Compressor, for instance, improves efficiency by approximately 15%. This efficiency gain translates into substantial energy savings, reducing operational costs. The two-stage compression process requires less energy because the air is cooled between stages, making it easier to compress further.

Superior Performance and Reliability

Two-stage screw compressors are known for their superior performance and reliability. The DEHAHA model’s low vibration and noise levels make it an excellent choice for work environments that prioritize minimal operational disruptions. The durable construction and advanced features, such as the IP65 PM motor, ensure the compressor can handle demanding conditions and deliver consistent performance over time.

Longevity and Reduced Maintenance

The design of two-stage screw air compressors results in lower operating temperatures and balanced workloads across stages. This reduces wear and tear on the components, leading to enhanced durability and a longer lifespan. With fewer maintenance issues and extended operational life, DEHAHA Two-stage PM VSD Screw Air Compressor offers excellent long-term value.

Versatility and Adaptability

Two-stage screw compressors are highly versatile and adaptable to various industrial applications. The DEHAHA compressor’s IP65 PM motor, for example, is designed to perform well even in poor and dusty working conditions. This adaptability makes two-stage compressors suitable for a wide range of environments and industries.

Advanced Features of the DEHAHA Two-Stage Screw Compressor

IP65 PM Motor

DEHAHA 2 stage compressor
DEHAHA 2 stage compressor

The DEHAHA Two-stage PM VSD Screw Air Compressor features an IP65-rated permanent magnet motor. This motor offers several advantages:

  • Higher Efficiency: The permanent magnet motor is more efficient than standard motors, contributing to the overall energy savings of the compressor.
  • Protection: The IP65 rating ensures the motor is protected against dust and water ingress, making it suitable for harsh working conditions.
  • Reliability: The high protection level and efficient design enhance the motor’s reliability and longevity.

Intelligent Touchable LED Controller

The compressor is equipped with a touchable LED controller for intelligent control. This advanced control system offers several benefits:

  • User-Friendly Interface: The touchable LED screen provides an easy-to-use interface for operators, simplifying the monitoring and adjustment of the compressor’s performance.
  • Optimal Operation: Intelligent control ensures the compressor operates at peak efficiency, adjusting parameters as needed to maintain optimal performance.
  • Motor Protection: The control system includes high-efficiency motor protection, safeguarding the motor against potential issues and extending its operational life.

Low Vibration and Noise Levels

The DEHAHA Two-stage PM VSD Screw Air Compressor is designed to operate with low vibration and noise levels. This feature is particularly beneficial in work environments where noise reduction is essential. The low vibration also contributes to the overall durability and reliability of the compressor by reducing the mechanical stress on components.

Applications of Two-Stage Screw Compressors

Two-stage screw compressors are ideal for a variety of industrial applications where continuous, high-pressure air is required. Some common applications include:

  1. Manufacturing Plants: Used to power pneumatic tools, machinery, and equipment, ensuring smooth and efficient operations.
  2. Automotive Shops: Essential for tasks such as painting, tire inflation, and powering air tools.
  3. Construction Sites: Provide the necessary air pressure for operating heavy-duty tools and equipment.
  4. Food and Beverage Industry: Used for packaging, bottling, and other processes requiring clean and consistent compressed air.
  5. Pharmaceutical Industry: Critical for maintaining sterile environments and powering production machinery.

Benefits in Specific Industries

  • Manufacturing: In manufacturing plants, the reliable performance and energy efficiency of two-stage screw compressors like the DEHAHA model help maintain productivity while reducing operational costs.
  • Automotive: In automotive shops, the low noise and vibration levels create a more pleasant working environment, while the consistent air pressure ensures high-quality work.
  • Construction: On construction sites, the durability and adaptability of the compressor make it a valuable asset, capable of handling the rigors of outdoor and dusty environments.
  • Food and Beverage: In the food and beverage industry, the clean and consistent air provided by two-stage screw compressors is essential for maintaining product quality and safety.
  • Pharmaceutical: In pharmaceutical applications, the compressor’s reliability and efficiency support critical processes, ensuring smooth production and adherence to stringent industry standards.variety of industrial applications with DEHAHA SCREW COMPRESSOR

Choosing the Right Two-Stage Screw Compressor

When selecting a two-stage screw compressor for your needs, consider the following factors:

Airflow and Pressure Requirements

Determine the specific airflow (CFM) and pressure (PSI) requirements for your application. Ensure the compressor you choose can meet these demands consistently.

Motor and Protection Features

Look for compressors with high-efficiency motors and appropriate protection ratings, such as the IP65 PM motor in the DEHAHA model. These features enhance performance and durability, especially in challenging environments.

Control Systems

Advanced control systems, like the touchable LED controller in the DEHAHA compressor, provide user-friendly interfaces and intelligent control. These systems help maintain optimal performance and protect the motor from potential issues.

Noise and Vibration Levels

Consider the noise and vibration levels of the compressor, especially if it will be used in environments where noise reduction is important. Low vibration and noise contribute to a more pleasant and safe working environment.

Energy Efficiency

Energy efficiency is a critical factor, as it directly impacts operational costs. The DEHAHA Two-stage PM VSD Screw Air Compressor’s energy-saving capabilities make it an economical choice in the long run.

Maintenance and Care for Two-Stage Screw Compressors

Proper maintenance and care are essential to ensure the longevity and reliable performance of two-stage screw compressors. Here are some key maintenance tips:

Regular Inspections

Conduct regular inspections of the compressor and its components. Check for any signs of wear, leaks, or damage, and address issues promptly to prevent further complications.

Air Filter Maintenance

Keep the air filters clean and replace them as needed. Clean filters ensure optimal airflow and prevent contaminants from entering the compressor.

Oil Changes

If your compressor is oil-lubricated, perform regular oil changes according to the manufacturer’s recommendations. Clean oil ensures smooth operation and reduces wear on moving parts.

Belt Tension and Alignment

Check the tension and alignment of belts regularly. Properly tensioned and aligned belts reduce strain on the motor and improve efficiency.

Draining Moisture

Regularly drain any moisture from the air receiver tank to prevent rust and corrosion. This is particularly important in humid environments.

Cooling System Maintenance

Ensure the intercooler and other cooling components are clean and functioning correctly. Proper cooling is essential for maintaining efficiency and preventing overheating.

Intelligent Control System Checks

If your compressor has an intelligent control system, like the DEHAHA’s touchable LED controller, ensure it is functioning correctly and update any software or firmware as needed.


In summary, a two-stage air compressor, such as the DEHAHA Two-stage PM VSD Screw Air Compressor , offers numerous advantages over single-stage compressors. These include increased efficiency, energy savings, and lower operational noise and vibration. The advanced features, such as the IP65 PM motor and intelligent touchable LED controller, make the DEHAHA compressor a reliable, efficient, and durable choice for a wide range of industrial applications.


Related Articles

DEHAHA Compressor's Dealer Partner
Exciting Visit from Pakistan: Welcoming a Prospective Dealer Partner
DEHAHA 15kw Air Compressor for laser cutting
How to Choose the Air Compressor for Laser Engraver?
Dehaha Rotary Screw Compressor PM VSD Type Compressor Industrial Two Stage Screw Air Compressors
What is a 2-Stage Air Compressor?
Ecuadorian Clients Visit DEHAHA Screw Compressor Factory on May 24, 2024
Ecuadorian Clients Visit DEHAHA Screw Compressor Factory on May 24, 2024
Electric Driven Portable Screw Air Compressor
Electric Driven Portable Screw Air Compressor
37kW Industrial PM VFD Screw Air Compressor
37kW Industrial PM VFD Screw Air Compressor
low pressure screw compressor
Low Pressure Screw Air Compressor for Textile Industry
nitrogen generator
99.999% High Purity PSA Nitrogen Generator System
DEHAHA CPM30AAS Air Compressor for Laser Cutting
DEHAHA Compressor:How Can We Master the Evolution of Laser Cutting Machines in Just 1 Minute ?
DEHAHA DC30AAS Air Compressor for laser cutting
How can DEHAHA Air Compressor optimize laser cutting efficiency?


Stay updated with the latest from DEHAHA! Subscribe to our newsletter for exclusive insights, product launches, and industry news in the world of air compressors.

Electric Driven Portable Screw Air Compressor
Electric Driven Portable Screw Air Compressor
Electric Driven Portable Screw Air Compressor   Electric Driven Portable Screw Air Compressor
Scroll compression principle Compressor sucks air through air inlet located at outer scroll.Compression chamber goes smaller with rotary movement and trapped air is compressed.Compression chamber becomes minimum volume at the center of the scroll and air is pumped out through air outlet located at the center of scroll.These, suction, compression & discharging, process is repeated continuously. Long maintenance cycle with long life consumable parts. Compressor head replacement at every 10,000 hours or 4 years whichever comes earlier. Scroll oil free screw air compressor, 100% oil free for food industry, dental and medical industry. Technical parameter Model Capacity (m³/min ) Power (kW) Host architecture Exhaust pressure (Mpa) Noise (dB) Outlet diameter Dimensions (mm) L*W*H Weight (kg) DHH2OS 0.24 2.2 2.2*1 0.8 58±2 1/2 640*660*890 200 DHH3OS 0.41 3.7 3.7*1 0.8 58±2 1/2 640*660*890 220 DHH3OS 0.36 3.7 3.7*1 1 58±2 1/2 640*660*890 220 DHH5OS 0.60 5.5 5.5*1 0.8 58±2 1/2 640*660*890 240 DHH7OS 0.82 7.5 3.7*2 0.8 58±2 3/4 1000*690*990 300 DHH7OS 0.72 7.5 3.7*2 1 58±2 3/4 1000*690*990 300 DHH11OS 1.25 11 5.5*2 0.8 58±2 3/4 1000*690*990 340 DHH11OS 1.25 11 3.7*3 0.8 58±2 3/4 1150*690*1700 430 DHH11OS 1.08 11 3.7*3 1 58±2 3/4 1150*690*1700 430 DHH15OS 1.66 15 3.7*4 0.8 62±2 1 1490*1150*1290 620 DHH15OS 1.44 15 3.7*4 1 62±2 1 1490*1150*1290 620 DHH16OS 1.80 16.5 5.5*3 0.8 62±2 1 1150*690*1700 490 DHH18OS 2.14 18.5 3.7*5 0.8 65±2 1 1490*1150*1700 840 DHH18OS 1.77 18.5 3.7*5 1 65±2 1 1490*1150*1700 840 DHH22OS 2.55 22 5.5*4 0.8 65±2 1 1490*1150*1290 700 DHH22OS 2.55 22 3.7*6 0.8 65±2 1 1490*1150*1700 910 DHH22OS 2.11 22 3.7*6 1 68±2 1 1490*1150*1700 910 DHH30OS 3.40 30 3.7*8 0.8 68±2 5/4 1490*1150*2140 1140 DHH30OS 2.81 30 3.7*8 1 68±2 5/4 1490*1150*2140 1140 DHH33OS 3.60 33 5.5*6 0.8 68±2 5/4 1490*1150*1700 1010 Clean oil free compressed air Adopt 74 degree conicity dry seamless, more reliable seamless, eliminate air leakage. Not just compression process is oil free, but also on the afterward transportation adopt stainless steel pipe, stainless steel check valve, stainless steel air receiver(for air receiver mounted), ensure the quality of compressed air. High efficiency scroll air end Adopt the advanced oil free scroll airend, reliable bearing and grease, make sure the reliability and long life-span of airend, high precise machine for motivated scroll, fixed scroll and housing, ensure high efficiency of airend. Reliable seamless material, ensure compression chamber and lubricated transmit 100% be separate, ensure compressed air is oil free. High Reliability Cooling fan adopt integrated centrifugal impeller, low noise, high cooling air pressure, high cooling air, ensure the cooling air is enough, ventilation fan adopt silence axial fan, ensure the heat inside of cabinet could be eliminated in time. Heat exchange has been increased 20%-30%, anticorrosive treatment inner structure, after strict testing, ensure the exhausting air less than environment temp.+10-15ºC, reduce the burden of downstream equipment. Adopt direct driven, not belt driven, improve transmission efficiency & reliability, reduce the maintenance cost of changing belt. Project case 30Kw 120CFM compressor 8bar pressure oil free rotary scroll air compressor
DEHAHA Oil Free Rotary Scroll Air Compressor
DEHAHA Oil Free Rotary Scroll Air Compressor       Technical parameter Model Capacity (m³/min...
Centrifugal Compressor for Oil refining
Centrifugal Compressor for Oil Refining
Centrifugal Compressor for Oil Refining   Technical Parameter   Applications



1199 Xiyuan Road, Qidong City, Jiangsu Province

Copyright © 2024 DHH
Powered by DHH Compressor

Scroll to Top