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Home / All / Portable air compressor & Mining Equipment / Electric portable screw air compressor / JJDY50-8 Mobile PM VSD Screw Air Compressor
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JJDY50-8 Mobile PM VSD Screw Air Compressor
| Share | |
|---|---|
| Categories | Electric portable screw air compressor |
| Brand | Jinjing Professional Air Compressor Manufacturer |
| Product Specifications | JJDY50-8 Bar Air Compressor |
| Color | Yellow or custom |
| Power | 250kw (340 HP) |
| Wheels | 4 |
| Pressure | 8 Bar |
| OEM | Support |
| Name | 340HP Electric Air Compressor |
| FOB port | Tianjin |
| Terms of Payment | L/C, T/T |
| Download |   |
Detail Information
The JJDY50-8 is a heavy-duty 250KW Air Compressor (equivalent to a 340HP Air Compressor) engineered to deliver massive airflow at a working pressure of 8 Bar. Unlike stationary units, this Mobile Air Compressor is built on a rugged 4-wheel chassis with a towing hitch, making it a true Trailer Air Compressor that can be easily relocated between remote job sites. As a highly efficient Electric Air Compressor, it is powered by a Permanent Magnet Compressor motor combined with advanced Variable Frequency Compressor technology. This PM VSD Air Compressor design ensures that the motor speed perfectly matches your actual air demand, significantly reducing energy waste. At its core lies a precision-machined Double-Stage Screw Compressor air end. This Two-Stage Air Compressor configuration compresses air in two phases, resulting in lower operating temperatures, higher volumetric efficiency, and a longer service life compared to traditional single-stage units. Whether you need a reliable Portable Air Compressor for a temporary site or a robust Screw Air Compressor for continuous industrial use, this model delivers unparalleled performance.
Parameter Specification
Model： JJDY50-8 / JJDY250II-8
Type： Mobile Trailer-Mounted Screw Compressor
Motor Power： 250 kW (340 HP)
Working Pressure： 8 Bar (0.8 MPa)
Compression Stage： Two-Stage (Double-Stage)
Drive Method： Permanent Magnet VSD (Variable Speed)
F.A.D (Free Air Delivery) ：[31-48 m³/min or custom ]
Cooling Method： Air Cooled (Multi-fan heavy-duty radiator)
Chassis Design： 4-Wheel Trailer with towing hitch & shock absorbers
Power Supply： 380V/50Hz/3Phase (Customizable)
Dimensions (LWH) ： 3700 × 2100 × 2100 mm
Net Weight ： 4,000 kg
Protection Class： IP55 Motor
Key Advantages & Features
Energy-Saving PM VSD Technology
Equipped with a Permanent Magnet Synchronous Motor and a Variable Frequency Drive. It automatically adjusts its running speed to match your precise air consumption. When air demand drops, energy consumption drops—saving you up to 30-40% in power costs compared to traditional fixed-speed units.
High-Efficiency Double-Stage Air End
Two stages of compression mean the air is compressed more efficiently and at a lower temperature. This results in higher output, less vibration, and a significantly longer service life for the bearings and rotors.
Rugged All-Terrain Mobility
Built for the harshest job sites. The heavy-duty 4-wheel chassis, combined with a heavy-duty towing fork and shock absorbers, allows it to be easily towed across uneven terrains in mines and construction sites.
Extreme Climate Cooling System
Featuring a large-surface area radiator and multiple high-power axial fans, this compressor is engineered to run 24/7 continuously even in scorching, dusty environments without overheating.
Fully Enclosed Weatherproof Canopy
The steel canopy protects internal components from rain, dust, and debris. The wide-opening doors (as seen in the photos) provide excellent accessibility for routine maintenance and servicing.
Application
Mining & Quarrying: As a powerful Mining Air Compressor, this unit provides the high-volume, continuous airflow required for pneumatic rock drills, ventilation systems, and heavy-duty excavation equipment in remote, off-grid locations.
Construction & Tunneling: Ideal as a Construction Air Compressor, it is perfectly suited for powering shotcrete machines, jackhammers, and concrete spraying equipment right at the excavation site, thanks to its rugged Trailer Air Compressor mobility.
Water Well Drilling: Engineered to perform as a reliable Water Well Drilling Compressor, it ensures a steady and powerful air supply for deep-well drilling rigs, significantly improving drilling speed and operational efficiency.
Surface Preparation: When used as a Sandblasting Compressor, it delivers the stable, high-pressure air required to strip rust, paint, and coatings from heavy steel structures, ship hulls, and industrial tanks.
Frequently Asked Questions
1. Can this compressor run continuously 24/7?
Yes. The double-stage air end and the heavy-duty cooling system (large radiator + multi-fan setup) are specifically designed for continuous, heavy-duty industrial operation without overheating.
2. What happens if the air demand suddenly drops while it's running?
Because it is a PM VSD (Variable Speed Drive) machine, the motor will automatically slow down to match the lower air demand, saving power. If no air is used, it will run at a minimum speed and eventually go into a sleep mode to save energy.
3. Is the trailer chassis included in the price, or is it separate?
The trailer chassis, wheels, and towing hitch are fully integrated into the design and are included as a standard part of the mobile compressor unit.
4. How do I transport this machine overseas?
It is loaded into a standard 20ft or 40ft container, or shipped via Flat Rack (FR) depending on the shipping line. It is securely fastened to a wooden skid/frame to prevent movement during ocean transit.
5. Does the machine come with an air receiver tank and dryer?
The standard unit includes a built-in oil separator tank. If you require an additional air receiver tank or a refrigerated air dryer for cleaner, dry air (e.g., for sandblasting), we can provide them as a combined package.
6. What is the startup process like in cold weather?
The VSD system allows for a soft start, which is gentler on the motor and electrical grid. However, in extremely cold conditions (below 0°C), we highly recommend using synthetic oil and ensuring the machine is housed in a slightly warmer area before startup.
7. Can I monitor the compressor's performance remotely?
Yes. The advanced PLC controller can be equipped with an optional IoT module (data logger), allowing you to monitor pressure, temperature, and running hours via a mobile app or web portal.
8. What kind of oil does this 250kW unit use?
It requires high-quality synthetic screw compressor oil designed for high temperatures. We provide the initial oil fill. For subsequent maintenance, you can purchase oil directly from us to ensure compatibility and warranty coverage.
9. Is it easy to change the filters myself?
Absolutely. The canopy features large hinged doors (as shown in the photos). The air filter, oil filter, and oil separator are all easily accessible from the sides, allowing your on-site technicians to perform routine maintenance quickly.
10. Does it meet European or American electrical standards?
We manufacture the machine according to your destination country's standards. We can provide motors and electrical components that meet CE standards (for Europe) or UL/CSA standards (for North America) upon request.
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