High-pressure scuba air compressor

Professional high-pressure air solutions for diving

Minnuo, as one of the professional high pressure air compressor manufacturers and suppliers in China, has 30 years + experience in manufacturing and selling energy-saving, efficient and stable high pressure air compressors!

MINNUO high-pressure breathing air compressors are professionally engineered for reliable, high-purity air supply across critical scenarios. Adopting precision multi-stage compression technology and a high-efficiency air cooling system, the units ensure stable, continuous operation without overheating risks. Integrated triple protection mechanisms guard against overload, overheating and low voltage issues, while intelligent automatic components minimize manual maintenance efforts. Designed to meet strict international breathing air standards, our compressors deliver clean, safe air for diverse applications including breathing support, emergency rescue, scientific research and professional diving services.

Select Your Model

680L

Charging rate (L/min)

680

Max. pressure (bar)

420

Power (kw)

Number of stages

Speed (rpm)

1320

Weight (kg)

484

720L

Charging rate (L/min)

720

Max. pressure (bar)

420

Power (kw)

Number of stages

Speed (rpm)

1350

Weight (kg)

484

810L

Charging rate (L/min)

810

Max. pressure (bar)

420

Power (kw)

Number of stages

Speed (rpm)

1430

Weight (kg)

585

Product Introduction

This series is a stationary, automatic and silent air compressor,which has fully enclosed structure and low noise. It’s applicable for use in
firefighting, diving, chemical, mining, rescue,etc. This series is driven by three-phase motor.

Features

The 680L/720L/810L series stationary automatic compressor is developed for high-demand breathing air filling stations that require stable, continuous performance. Designed with a fully enclosed structure, it delivers low-noise operation while protecting key components during long working hours. Driven by a three-phase motor, this stationary breathing air compressor is ideal for multi-cylinder filling and intensive duty cycles, making it a reliable solution for firefighting departments, diving centers, mining sites, and emergency rescue teams that need efficient SCBA cylinder filling with minimal supervision.

Air quality conforms to EN12021
CE, CCS, ISO9001 certificates
4 stage compression design
Cooling method: air cooling
Lubrication method: oil pump
PLC intelligent control
Functions:emergency switch, automatic start, automatic stop
automatic condensate drain,low oil level protection, phase
sequence protection, filter expiration reminder,etc

Standard Configuration

Filling hose 1.2M
4PCS

Activated carbon
filter cartridge

Intake filter

Oil filter

Filling valve 4PCS

4 Filling connections

Lubricating oil 5L

Sewage collection
barrel

Optional Configuration

DIN/INT Adaptor

6 Filling connections

300L

Charging rate (L/min)

100

Max. pressure (bar)

225/330

Power (kw)

2.2

Number of stages

Speed (rpm)

2300

Weight (kg)

400L

Charging rate (L/min)

100

Max. pressure (bar)

225/330

Power (kw)

2.2

Number of stages

Speed (rpm)

2300

Weight (kg)

Product Introduction

This series is silent high-pressure air compressor,which has fully enclosed structure and low noise. It’s applicable for use in firefighting, diving, chemical, mining, rescue,etc. This series can be driven by three-phase motor or single-phase motor.

Features

The 300L/400L series silent high-pressure air compressor is built for users who need a quiet yet powerful solution for breathing air cylinder filling. Its fully enclosed design helps reduce operating noise while offering enhanced protection for key components, making it suitable for indoor use and noise-sensitive environments. With both single-phase and three-phase motor options available, this breathing air compressor can be easily integrated into different workplaces or service stations, providing stable performance for firefighting support, diving operations, and emergency rescue applications.

Air quality conforms to EN12021
CE, CCS, ISO9001 certificates 3 stage compression design
Cooling method: air cooling
Microcomputer control panel with Chinese/English languages
Functions:emergency switch, automatic start, automatic stop,
automatic condensate drain, low oil level protection, phase sequence protection,filter expiration reminder,etc

Standard Configuration

Filling hose 1.2M
2PCS

Activated carbon
filter cartridge

Intake filter

Lubricating oil 2L

Filling valve 2PCS

2 Filling connections

Optional Configuration

DIN/INT Adaptor

4 Filling connections

400L

Charging rate (L/min)

400

Max. pressure (bar)

420

Power (kw)

Number of stages

Speed (rpm)

1640

Weight (kg)

525

450L

Charging rate (L/min)

450

Max. pressure (bar)

420

Power (kw)

Number of stages

Speed (rpm)

1740

Weight (kg)

531

Product Introduction

This series is a stationary, automatic and silent air compressor,which has fully enclosed structure and low noise. It’s applicable for use in firefighting, diving, chemical, mining, rescue,etc. This series is driven by three-phase motor.

Features

The 400L/450L Series is designed for fixed-site operations where quiet performance and automatic control are essential. With a fully enclosed structure, it effectively reduces noise and protects internal components, making it suitable for indoor stations and long-term standby use. Driven by a three-phase motor, this stationary breathing air compressor delivers stable and continuous air supply for SCBA cylinder filling and other breathing air applications, supporting firefighting teams, diving centers, and industrial rescue units with reliable and low-maintenance operation.

Air quality conforms to EN12021
CE, CCS, ISO9001 certificates
4 stage compression design Cooling method: air cooling
Lubrication method: oil pump
PLC intelligent control
Functions:emergency switch, automatic start, automatic stop,
automatic condensate drain,low oil level protection, phase sequence protection, filter expiration reminder,etc

Standard Configuration

Filling hose 1.2M
2PCS

Activated carbon
filter cartridge

Intake filter

Oil filter

Filling valve 2PCS

2 Filling connections

Lubricating oil 3L

Sewage collection barrel

Optional Configuration

DIN/INT Adaptor

4 Filling connections

300L

Charging rate (L/min)

300

Max. pressure (bar)

330

Power (kw)

9.5

Number of stages

Speed (rpm)

1250

Weight (kg)

180

200L

Charging rate (L/min)

200

Max. pressure (bar)

330

Power (kw)

6.6

Number of stages

Speed (rpm)

1100

Weight (kg)

160

400L

Charging rate (L/min)

400

Max. pressure (bar)

330

Power (kw)

9.5

Number of stages

Speed (rpm)

1360

Weight (kg)

195

Product Introduction

This series air compressor adopts compact frame structure design. This series is widely used in firefighting,diving, chemical,
mining, etc. The models are available with three-phase motor, single-phase motor or petrol engine, which can meet
different application needs.

Features

The 200L/300L/400L series air compressor is developed for users who require higher air output and stable performance in continuous operations. With a compact frame structure, it remains easy to transport and protects key components during outdoor use. Widely applied in firefighting, diving support, mining, and chemical rescue tasks, this breathing air compressor helps ensure a dependable air supply for cylinder filling and emergency response. Multiple power configurations, including three-phase motor, single-phase motor, and petrol engine drive, allow flexible installation and fast deployment across different working environments.

Air quality conforms to EN12021
CE, CCS, ISO9001 certificates
3 stage compression design, 2nd and 3rd stage oil-water
separation
Cooling method: air cooling
Lubrication method: Splash lubrication
Final stage double filter cartridges is optional
Automatic stop is optional

Standard Configuration

Filling hose 1.2M
4PCS

Activated carbon
filter cartridge

Intake filter

Lubricating oil 2L

Filling valve 2PCS

2 Filling connections

Optional Configuration

DIN/INT Adaptor

Filling hose 1.2M 4PCS

Filling valve 4PCS

4 Filling connections

Final stage double filter cartridges

Automatic stop device

265Y

Charging rate (L/min)

265

Max. pressure (bar)

225/330

Power (kw)

5.5

Number of stages

Speed (rpm)

1550

Weight (kg)

120

200Y-G

Charging rate (L/min)

200

Max. pressure (bar)

255/330

Power (kw)

5.1

Number of stages

Speed (rpm)

1300

Weight (kg)

115

300Y

Charging rate (L/min)

300

Max. pressure (bar)

225/330

Power (kw)

7.5

Number of stages

Speed (rpm)

1800

Weight (kg)

120

Product Introduction

This series air compressor adopts compact frame structure design. This series is widely used in firefighting,diving, chemical, mining, etc. The models are available with three-phase motor, single-phase motor or petrol engine, which can meet different application needs.

Features

The 200Y-G/265Y-G/300Y-G series is designed for reliable field operation with a compact frame structure that offers better protection and easy transport. It is an ideal choice for firefighting, diving support, mining sites, and chemical emergency applications where power supply may be limited. With flexible drive options including petrol engine, single-phase motor, and three-phase motor, this portable breathing air compressor can quickly adapt to different job sites, providing stable performance for on-site cylinder filling and continuous air support.

Air quality conforms to EN12021
CE, CCS, ISO9001 certificates
3 stage compression design
The motor has overload, overheating and low voltage protection
Providing 225 Bar/330 Bar filling pressure for options
Lubrication method: oil pump
Cooling method: air cooling
Manual stop is standard
Automatic stop is optional
Automatic condensate drain is optional

Standard Configuration

Filling hose 1.2M
2PCS

Filling valve 2PCS

Activated carbon
filter cartridge

Air filter

Lubricating oil 2L

Optional Configuration

DIN/INT Adaptor

Automatic stop

265L

Charging rate (L/min)

265

Max. pressure (bar)

225/330

Power (kw)

5.5

Number of stages

Speed (rpm)

1550

Weight (kg)

120

200L

Charging rate (L/min)

200

Max. pressure (bar)

255/330

Power (kw)

4.0

Number of stages

Speed (rpm)

1300

Weight (kg)

120

300L

Charging rate (L/min)

300

Max. pressure (bar)

225/330

Power (kw)

7.5

Number of stages

Speed (rpm)

1800

Weight (kg)

120

Product Introduction

200L-265L-300L series Gasoline air compressor has relatively light weight and small size which allows mobility and portability. It’s equipped
with two filling hoses and two filling valves, which can simultaneously inflate two cylinders to improve efficiency. It’s applicable for use in
firefighting, diving, chemical, mining,rescue,etc. This series can be driven by three-phase motor or gasoline engine to meet different
application needs.

Features

The 200L-265L-300L series gasoline air compressor is engineered for mobile operations where fast cylinder filling and flexible deployment are required. Its lightweight design makes it easy to transport and set up on site, while the dual filling system enables two cylinders to be refilled simultaneously for higher productivity. With gasoline engine drive for remote locations and optional motor power for stable workshops, this portable gasoline air compressor is well-suited for firefighting units, diving teams, and rescue services that need efficient breathing air support in both indoor and outdoor working conditions.

Air quality conforms to EN12021
CE, CCS, ISO9001 certificates
3 stage compression design
The motor has overload, overheating and low voltage protection
Providing 225 Bar/330 Bar filling pressure for options
Lubrication method: oil pump
Cooling method: air cooling
Manual stop is standard
Automatic stop is optional
Automatic condensate drain is optional

Standard Configuration

Filling hose 1.2M
2PCS

Activated carbon
filter cartridge

Air filter

Lubricating oil 2L

Filling valve 2PCS

Optional Configuration

DIN/INT Adaptor

Automatic condensate drain

Automatic start

265Y

Charging rate (L/min)

265

Max. pressure (bar)

225/330

Power (kw)

5.5

Number of stages

Speed (rpm)

1550

Weight (kg)

120

200Y

Charging rate (L/min)

200

Max. pressure (bar)

255/330

Power (kw)

4.0

Number of stages

Speed (rpm)

1300

Weight (kg)

120

300Y

Charging rate (L/min)

300

Max. pressure (bar)

225/330

Power (kw)

7.5

Number of stages

Speed (rpm)

1800

Weight (kg)

120

Product Introduction

Features

The 200Y/265Y/300Y series air compressor features a compact frame structure that improves stability and protection for long-term outdoor and industrial use. Designed for demanding applications such as firefighting, diving support, chemical operations, and mining sites, it provides a reliable air source for breathing equipment and cylinder filling tasks. With flexible power options including three-phase motor, single-phase motor, or petrol engine drive, this portable air compressor can easily adapt to different working environments, ensuring consistent performance wherever it is deployed.

Air quality conforms to EN12021
CE, CCS, ISO9001 certificates
3 stage compression design
The motor has overload, overheating and low voltage protection
Providing 225 Bar/330 Bar filling pressure for options
Lubrication method: oil pump
Cooling method: air cooling
Manual stop is standard
Automatic stop is optional
Automatic condensate drain is optional

Standard Configuration

Filling hose 1.2M
2PCS

Activated carbon
filter cartridge

Air filter

Lubricating oil 2L

Filling valve 2PCS

Optional Configuration

DIN/INT Adaptor

Automatic condensate drain

Automatic stop

265-GG

Charging rate (L/min)

265

Max. pressure (bar)

225/300

Power (kw)

Number of stages

Speed (rpm)

1550

Weight (kg)

115

200-GG

Charging rate (L/min)

200

Max. pressure (bar)

225/330

Power (kw)

5.1

Number of stages

Speed (rpm)

1300

Weight (kg)

115

300-GG

Charging rate (L/min)

300

Max. pressure (bar)

225/330

Power (kw)

Number of stages

Speed (rpm)

1800

Weight (kg)

115

Product Introduction

200-GG/265-GG/300-GG series Gasoline air compressor has relatively light weight and small size which allows mobility and portability.
It’s equipped with two filling hoses and two filling valves, which can simultaneously inflate two cylinders to improve efficiency. It’s
applicablefor use in firefighting, diving, chemical, mining,rescue,etc. This series can be driven by three-phase motor or gasoline engine
to meet different application needs.

Features

The 200-GG/265-GG/300-GG series gasoline air compressor is built for high-efficiency cylinder refilling in tough field conditions. With a dual filling system, it allows two cylinders to be filled at the same time, helping teams reduce downtime during intensive operations. Powered by a gasoline engine or optional motor drive, this portable gasoline air compressor is an ideal solution for remote firefighting sites, mining areas, and emergency rescue missions where stable and continuous air supply is required for breathing equipment and SCBA cylinder filling.

Air quality confoms to EN12021
CE, CCS, ISO9001 certificates
3 stage compression design
Providing 225 Bar/330 Bar filling pressure for options
Cooling method: air cooling
Optional automatic shutdown

Standard Configuration

Filling hose 1.2M
2PCS

Activated carbon
filter cartridge

Intake filter

Lubricating oil 2L

Filling valve 2PCS

Optional Configuration

DIN/INT Adaptor

Automatic stop

720L

Charging rate (L/min)

100

Max. pressure (bar)

225/330

Power (kw)

2.2

Number of stages

Speed (rpm)

2300

Weight (kg)

680L

Charging rate (L/min)

100

Max. pressure (bar)

225/330

Power (kw)

Number of stages

Speed (rpm)

2300

Weight (kg)

720L

Charging rate (L/min)

100

Max. pressure (bar)

225/330

Power (kw)

Number of stages

Speed (rpm)

2300

Weight (kg)

Product Introduction

100L Series is a portable breathing air compressor. It has compact structure, light weight and high reliability. This series is widely used in firefighting,diving,paintball shooting,rescue,etc. The models areavailable with three-phase motor, single-phase motor or petrol engine , which can meet different application needs.

Features

Designed for fast on-site cylinder filling, the 100L Series breathing air compressor provides stable airflow and dependable performance for demanding operations. It is suitable for filling SCBA cylinders and other breathing air applications, making it a practical choice for firefighting teams, rescue units, and diving support. With multiple power options available, this portable breathing air compressor can adapt to different job sites and working conditions while maintaining safe and consistent air supply.

· Air quality complies with EN12021

· CE, CCS, ISO9001 certificates

· Main engine adopts 4 stage compression

· The motor has overload, overheating and low voltage protection

· Providing 225/330 Bar filling pressure for options

· Cooling method: air cooling

· Automatic stop is optional

· Automatic condensate drain is optional

Standard Configuration

Filling hose 1.2M

Activated carbon
filter cartridge

Air filter

Lubricating oil 0.5L

Optional Configuration

DIN/INT Adaptor

Autostop

Automatic sewage system

Filling valve

Specific Workflow

Step 1

Initial Compression & Filtration

Ambient air enters the first-stage cylinder through a special marine-grade intake filter with waterproof design, where it undergoes preliminary compression while removing salt particles and moisture.

Step 2

First Cooling & Separation

The compressed air flows into the stainless steel interstage cooler and oil-water separator, where it is cooled to ambient temperature and lubricating oil is separated.

Step 3

Second Compression Stage

The cooled and purified air then moves into the second-stage cylinder for further compression, increasing pressure while maintaining air quality.

Step 4

Additional Cooling & Purification

After secondary compression, the air passes through the second interstage cooler and high-efficiency separator, allowing for more intensive cooling and oil removal.

Step 5

Third Compression Stage

The pre-purified air enters the third-stage cylinder for higher pressure compression, preparing for final output pressure.

Step 6

Final Compression & Deep Cooling

The air undergoes final compression in the fourth-stage cylinder, then passes through the aftercooler to reach the optimal temperature for diving applications.

Step 7

Advanced Purification

The high-pressure air is processed through a multi-stage purification system including coalescing filters, activated carbon towers, and molecular sieve driers to eliminate oil, condensate, and contaminants to meet EN 12021 breathing air standards.

Step 8

Quality Monitoring & Storage

Finally, the purified high-pressure air passes through continuous quality monitoring and is stored in high-pressure diving cylinders or directly supplied to divers through distribution systems.

Step 9

Safety Assurance

The entire system includes multiple safety checks, emergency shutdown devices, and real-time air quality monitoring to ensure diver safety at all times.

Application Scenarios

Designed for a wide range of diving applications, delivering stable and safe breathing air under various operating conditions.

Diving and Underwater Engineering

Public Safety and Emergency Response

Marine Applications (Aboard Vessels)

Energy and Industrial Inspection

Pure Air. Proven Safety. Uncompromised Performance.

Explore our modern production facilities, professional assembly lines, and strict quality control system.

Why choose us?

Air Purification Standard

Compliant with EN 12021 breathing air standards

Anti-Corrosion Design

Engineered for reliable operation in marine environments

Safety Redundancy

Multiple protection systems ensure diver safety

Reliability

Compliant with EN 12021 breathing
air standards

Portability

Compliant with EN 12021 breathing
air standards

Frequently Asked Questions

1.What advantages does this compressor have for emergency rescue scenarios compared to ordinary air compressors?

Our high-pressure breathing air compressors are optimized for emergency rescue scenarios in three key aspects. First, portable models feature a compact structure and flexible power options (single-phase motor, petrol engine) for quick deployment in field environments without grid power. Second, the air output strictly complies with the EN12021 breathing air standard, ensuring clean, safe air supply for rescuers in critical situations. Third, built-in triple protection against overload, overheating and low voltage guarantees stable operation even under harsh rescue conditions.

2.Is this compressor suitable for long-term use in marine shipboard environments?

Yes, it is. The equipment adopts marine-grade anti-corrosion coating and stainless steel core components, which can effectively resist the erosion of salt spray, high humidity and other harsh marine environments. Equipped with a waterproof intake filter, it can operate stably for a long time on board, and is widely used in shipboard breathing support and marine emergency operations.

3.How to improve the inflation efficiency when multiple teams need air supply at the same time?

For scenarios such as multi-team diving missions and large-scale emergency rescue operations, you can choose the 200L-300L series compressors. This series is equipped with dual filling hoses and dual filling valves, which can inflate two air cylinders simultaneously, doubling the inflation efficiency and meeting the air supply needs of multiple teams at the same time.

4.What safety protection measures does the compressor have to ensure stable operation in complex scenarios?

The equipment is built with multiple safety protection mechanisms, including overload, overheating and low voltage triple protection, as well as automatic condensate drain function. For fixed application scenarios such as breathing air stations and diving bases, it also supports intelligent pressure control and automatic start/stop, ensuring safe and stable operation even in unattended conditions.

5.What is the maintenance cycle of the compressor? Is it suitable for high-frequency use in emergency rescue and marine scenarios?

The regular maintenance cycle of the equipment is 2000 hours. Its core components are made of wear-resistant materials, which can support continuous long-term operation. Aiming at the high-frequency use characteristics of emergency rescue and marine operations, we also provide customized maintenance plans and rapid spare parts supply services to minimize equipment downtime.