The used Doosan model 7-71 compressor is a robust and reliable machine, ideal for industrial applications requiring a constant flow of compressed air. Built in 2013 and with only 1568 hours of operation, this compressor is designed to offer high performance with a flow rate of 260 cfm (approximately 7.4 m³/min) and an operating pressure of 7 bar, with a maximum working pressure of 8 .6 bars. Powered by a 4-cylinder Yanmar engine, the Doosan 7-71 is built to withstand intense and prolonged working conditions.
Casing and Structure : The machine is enclosed in a robust metal casing, designed to protect the internal components and ensure durability in demanding working environments. The structure is resistant to impacts and adverse weather conditions.
Yanmar 4 Cylinder Engine : This diesel engine is known for its efficiency and reliability. With a 4-cylinder configuration, it offers a balance between power and fuel consumption, with low emissions and good performance even at heavy loads.
Compressor Assembly : Equipped with a rotary screw compressor, the assembly is designed for continuous, low maintenance operation. The compressor components are made of wear-resistant materials to ensure long life.
Cooling System : The compressor includes a liquid cooling system that prevents the engine and internal components from overheating, keeping the machine operating at optimal temperatures.
Control Panel : The control panel allows you to monitor and adjust the air pressure and flow rate. It also provides information on the operating status of the compressor and any maintenance needs.
Flow rate : 260 cfm (approximately 7.4 m³/min), which provides sufficient air flow for a wide range of industrial applications.
Operating Pressure : 7 bar, with a maximum operating pressure of 8.6 bar, suitable for multiple industrial and pneumatic uses.
Year of Construction : 2013, suggesting that the machine has approximately 11 years of useful life.
Operating Hours : 1568 hours, a figure that indicates relatively limited use compared to the overall life of the machine. This can mean that the compressor still has a long life remaining if maintained properly.
Dimensions and Weight : While specific dimensions may vary, a compressor of this size typically measures approximately 2000mm long, 1200mm wide and 1400mm high, with a weight that can exceed 1500kg.
Energy Efficiency : The Yanmar engine and rotary screw compressor are designed to optimize energy efficiency, reducing fuel consumption and emissions.
Reliability : The robustness of the construction and the quality of the materials guarantee reliable and continuous operation even in demanding working environments.
Noise : The design is designed to minimize noise during operation, improving working conditions.
Switching on : Switch on the compressor using the control panel. Check that all connections are secure and that the compressor is ready for use.
Pressure and Flow Adjustment : Set the desired pressure and flow through the control panel based on the needs of the application.
Monitoring and Control : Keep the operating parameters and general status of the compressor under control via the control panel. Make sure the compressor operates within recommended limits.
Shutdown and Maintenance : Switch off the compressor and wait for all components to stop completely before carrying out any maintenance work.
Storage Tank : A storage tank can be used to improve pressure stability and reduce the number of cycles the compressor cycles on and off.
Air Dryer : A dryer helps remove moisture from compressed air, protecting pneumatic equipment and improving air quality.
Energy Consumption:
E=P×tE = P \times tWhere EE is the energy consumed, PP is the motor power and tt is the operating time.
Calculation of Flow Rate and Pressure:
Pmotor=Q×PηP_{motor} = \frac{Q \times P}{\eta}Where PmotorP_{motor} is QQ is the flow rate, PP is the pressure and η\eta is the compressor efficiency.
The Doosan 7-71 compressor is designed to handle compressed air, suitable for a wide range of industrial and pneumatic applications, such as powering industrial tools and machines.
Checking the Filters : Replace the air and oil filters regularly to ensure optimal performance and long life of the compressor.
Oil Change : Perform oil changes according to the manufacturer's recommendations to keep the engine well lubricated and running smoothly.
Cooling System Inspection : Check and maintain the cooling system to avoid overheating and malfunctions.
Check Operating Hours : Monitor operating hours to plan and manage preventative maintenance.
General Condition : Inspect the compressor for any signs of wear or damage to external and internal components.
Operating Hours : With 1568 hours of operation, the compressor has accumulated moderate usage, indicating that it could still have a long useful life if maintained properly.
Maintenance History : Check maintenance records to ensure the compressor has been cared for properly.
The Doosan model 7-71 compressor is suitable for various industrial sectors, including:
Manufacturing Industry : Powering pneumatic machines and tools.
Construction Sector : Used on construction sites for pneumatic equipment and tools.
Energy Sector : Supplies compressed air for energy and industrial applications.
Buying a used compressor like the Doosan 7-71 offers numerous advantages:
Reduced Cost : The price of a used compressor is generally lower than that of a new one, offering a more economical option for businesses.
Reliability : Used compressors from reputable brands like Doosan are often well built and can offer long life and reliable performance.
Immediate Availability : A used compressor can be immediately available for purchase and use, reducing waiting times compared to a new one.
In summary, the Doosan Model 7-71 compressor is a solid choice for those looking for a rugged and reliable machine, with a good balance between performance and cost. The low operating hours and the relatively recent year of construction make this compressor an interesting option on the used market.
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