The DJW250A high-pressure breathing air compressor

Product Overview
The DJW250A high-pressure breathing air compressor is a three-stage piston-type compressor specifically designed for supplying breathable air to the human respiratory system. It is driven by a 380V/50Hz three-phase electric motor with a rated power of 5.5 kW. The unit compresses ambient air through three successive stages to a maximum working pressure of 350 bar, with a displacement of 250 L/min. Its compact structure offers excellent portability and facilitates onsite deployment.

The DJW250A adopts a threestage compression design with air cooling, forced oil lubrication via an oil pump, and is equipped with dual G5/8 filling connectors, allowing simultaneous filling of two breathing cylinders. It is widely used in firefighting, diving, emergency rescue, mine rescue, medical first aid, and other fields that require highquality breathing air.

DJW250A – Technical Specifications

DJW250A High-Pressure Breathing Air Compressor – Core Product Features

⚡ Efficient Filling, Zero Downtime
Powered by a 380V/5.5kW industrial-grade motor and running at an optimal 1450 RPM, this compressor delivers a large displacement of 250 L/min. It reaches 350 bar in just minutes through three-stage compression. The dual G5/8 filling ports allow simultaneous filling of two cylinders, doubling efficiency and drastically reducing on-site waiting time – every second counts in rescue and operation scenarios.

🛡️ Triple Safety Barriers – Protecting Your Respiratory Lifeline

• Full-stage overpressure protection: Each compression stage is equipped with an independent safety valve (3 in total) for stepwise pressure relief, eliminating the risk of overpressure.

• Intelligent auto‑stop: Automatically shuts off upon reaching the set pressure – no manual supervision required, saving energy and preventing overcharging.

• Visual oil sight glass: Oil level is visible at a glance, helping avoid dry running due to insufficient lubrication, providing early warning and preventing potential failures.

🔧 Rugged Construction, Built to Last

• Three‑stage piston + air cooling + forced oil pump lubrication: Efficient heat dissipation ensures stable operation even under continuous heavy loads; forced lubrication significantly reduces friction, extends the compressor head’s service life, and adapts to high‑intensity daily use.

• Belt drive: Flexibly transmits power, absorbs shocks and vibrations, low maintenance cost, and easy replacement.

• Manual condensate drain: Simple operation – regularly discharge condensed water to guarantee clean, dry output air that meets breathable air quality standards.

📦 Compact & Lightweight – Ready Wherever You Are
With overall dimensions of approximately 1330×590×570mm and a weight of only 127kg, the unit comes with mobile castors (subject to confirmation; usually standard equipment). It can easily navigate tight spaces and be rapidly deployed on fire trucks, rescue boats, or at emergency sites without site restrictions.

🎯 All‑in‑One Package – Ready to Use Out of the Box
Includes 2 high‑pressure filling hoses (G5/8 connectors) as standard – no extra accessories needed. The forced lubrication system is pre‑filled with oil at the factory, so you can start filling immediately upon arrival – saving time and effort.

Original Manufacturer · Customization with No Worries – Core Advantages of High‑Pressure Breathing Air Compressors

We Are the Original Factory – You Are Always Welcome to Visit
Our company integrates R&D, manufacturing, and sales, with complete compressor production lines and after‑treatment purification system production lines. From core component processing to final assembly, commissioning, and testing, everything is independently controlled. We are not middlemen – we offer factory‑direct pricing, transparent quality, and reliable delivery schedules.

We sincerely invite both new and existing customers to call for inquiries or visit our factory for inspection. You can witness the birth process of every compressor on‑site, and our professional engineers will accompany you throughout the tour to provide detailed explanations.

Customized on Demand – Flexibly Matched to Your Operating Conditions
Different application scenarios have varying requirements for power supply, control, pressure, and flow rate. We offer in‑depth customization services, with the main options including:

Whether you are in firefighting, diving, mining, medical, or industrial leak testing, we can provide tailor‑made technical solutions to ensure that the equipment perfectly suits your on‑site conditions.