DJW300C breathing air compressor

The DJW300C breathing air compressor (also known as an air filling pump) is a compact high‑pressure air supply unit specifically designed for breathing air applications. It adopts three‑stage piston compression technology and is powered by a gasoline engine, featuring high flow rate, high pressure, and portability. It is widely used in firefighting, diving, rescue operations, and other fields that require high‑purity breathing air.

DJW300C Breathing Air Compressor – Technical Specifications

DJW300C Breathing Air Compressor – Product Features

1. High flow rate and high‑pressure output
   With a flow rate of 300 L/min and a maximum working pressure of 350 bar, the unit can quickly fill multiple high‑pressure cylinders with breathing air, significantly improving charging efficiency and meeting the demands of firefighting, diving, and other emergency operations.

2. Three‑stage compression for smooth operation
   Featuring 3‑stage piston compression and 3 cylinders, combined with belt drive, the compression process is stable and reliable, with low vibration and noise, while effectively extending the service life of the equipment.

3. Gasoline engine powered – free from electrical constraints
   Driven by a 10 HP gasoline engine, the compressor requires no external power supply, making it ideal for field rescue, remote areas, vehicle‑mounted mobile filling, and other scenarios without mains electricity.

4. Multiple safety protection mechanisms
   Equipped with 3 intermediate safety valves that provide over‑pressure protection at each compression stage. In addition, manual shutdown and manual pressure relief allow operators to safely stop the machine or release residual system pressure at any time.

5. Forced lubrication and visual monitoring
   An integrated forced oil pump lubrication system ensures continuous and adequate lubrication of all moving parts. A visual oil sight glass enables direct observation of oil level and oil quality during operation, facilitating routine maintenance.

6. Clean air output meeting breathing standards
   Through multi‑stage separation and filtration during compression, oil, moisture, and solid particles are effectively removed. The discharged high‑pressure air is clean and odourless, meeting the purity requirements for breathing air and ensuring user safety.

Product Application Areas

1. Fire Rescue – Rapid on‑site filling for firefighter breathing apparatus; gasoline‑powered, no mains electricity required, suitable for power outages or remote field environments.

2. Diving Operations – Filling diving cylinders; high flow rate reduces turnaround time, ideal for shore‑based and marine operations.

3. Industrial Applications – Used for cylinder replenishment and airtightness testing; dual outlets improve filling efficiency.

4. Paintball Sports – Rapid filling for paintball cylinders; dual outlets allow simultaneous filling of two cylinders.

5. Shooting Sports – Provides clean high‑pressure air for PCP airguns, extending their service life.

6. Emergency Rescue – Provides instant high‑pressure air for rescue equipment in disaster zones or areas without electricity; the unit is lightweight and easy to transport.

Reasons to Choose Us

1. Dual-Brand Strategy for Targeted Service
We operate under two brands – Dejue (Shanghai) Compression Machinery Co., Ltd. focuses on overseas markets, while Baosi Compressor (Shanghai) Co., Ltd. serves the domestic Chinese market. Wherever you are, we provide products that comply with local standards and professional services tailored to your needs.

2. In‑House R&D and Strong Manufacturing Capability
Our facility covers 20 mu (approx. 13,334 m² / 3.3 acres), featuring standardized production workshops and a comprehensive quality control system. From R&D to manufacturing, every step is under our strict control, ensuring each unit meets rigorous quality requirements.

3. Full Product Range for Diverse Needs
Our portfolio includes high‑pressure air compressors, breathing air filling pumps, firefighting and diving dedicated inflators, medium‑pressure blow‑moulding compressors, screw compressors, natural gas compressors, nitrogen boosters, and more. Maximum working pressure reaches up to 50 MPa (500 bar / 7,250 psi), with maximum flow up to 50 m³/min (1,765 CFM). No matter your compressed gas requirement, we have a solution.

4. International Standards, Proven Reliability
Designed with global engineering concepts, our equipment features advanced structures and easy operation and maintenance. Selected materials and mature processes ensure long‑term stable performance, rivaling that of European and American counterparts.

5. Cost‑Effective – Significantly Lower Total Cost of Ownership
We deliver quality equivalent to imported equipment while substantially reducing both initial purchase and lifecycle costs, giving you a higher return on investment.

6. Extensive Application Experience
Our products are widely used in diving breathing, firefighting breathing, leak testing, PET blow‑moulding, industrial gas supply, and many other fields. With rich industry experience, we can provide professional recommendations tailored to your specific applications.

7. Flexible Cooperation and Full‑Cycle Support
Overseas customers are served through our Dejue brand, offering products that meet local standards and comprehensive export services. Domestic customers can rely on our Baosi brand for localized support, flexible agency policies, and customised integration solutions. From selection to after‑sales, we accompany you every step of the way.

Choose us for professionalism, reliability, efficiency, and a long‑term partnership built on mutual success.