China wholesaler CHINAMFG Portable Oil Free Air Compressors (DA7003D) wholesaler

Product Description

Dynair Portable Oil Free Air Compressors (DA7003D)


Model: DA7003D

Voltage: 100-240V/50-60Hz

Power: 2250W [3HP]

Max Air Flow: 410L/min [14.4CFM]

Air Flow@7bar: 135L/min[4.77CFM]

Noise Level: ≤ 70 dB (A)

Max. Pressure: 8bar [116PSI]

Max Current: 10.2A

Dew-point Temperature: -20

Air Tank: 70L [15.4Gallon]

Gross Weight: 108.5kg [239.2lbs]

Net Weight: 89.5kg [197.3lbs]

Dimension: 920*500*750mm [36.2*19.7*29.5 inch]


1> Piston type;

2> Silent, Oil Free;


4> 3HP, 70L tank;


Metal Silent Cabinet ( all operation key located outside of the cabinet, easy to use; Temperature sensor and cooling system, keep longer service life for the motor; With casters, you may move the compressor freely )

Dry air:

A quality dryer is essential equipment for the users.

The ambient air contains humidity and impurities which must be dully treated in order to guarantee clean, dry and pure air to the patients and to avoid the risk of corrosion and oxidation of the expensive dental instruments, which are connected the the compressor.

The advantage of the “air dryer” system are the following:
No additional installation ( the system is integrated with the compressor)
No oxidation and corrosion;
Optimum air for patients, instruments and equipments;
Fully automatic operation;
Easy maintenance;
Low operative costs;
No power loss during the regeneration process;


1. Oil free: Do not need any lubricated oil, and harmless to the human body.

2. Super silent: Noise level lower than 56dB(a) to reduce noise pollution.

3. Multi-phase filteration: Advanced multi-phase filtration to ensure extremely clean air, and lengthen service life.

4. Safety using: Air compressor motors equipped with thermal prevention device to avoid overheating and protect motors.

5. Clean tank: All air receiver tanks have internal epoxy coating applied to avoid corrosion.

6. Automatic adjustment: High quality pressure switch used to control the power of air compressor automatically by adjustment of pressure level.

7. Pressure adjustment: Working pressure could be adjusted to meet the demand of different supporting equipments.

8. High durability: Serviceable time exceeds 15, 000 hours.

9. Simple operation: Using directly when connecting with power.

10. Easy maintanance: No need any lubricated oil.

11. Warranty: 2 years.


Medical; Laboratory; Pharmacy; Food Fermentation; Life Science; Biotechnology;

Analytical Instrument; Measuring Apparatus; Water Processing Environmental Monitoring;

Automation; Coating Surface Processing; Makeup; Garments Manufacture; Shoemaking;

Petro Chemistry; Arts, crafts and hobby; Beauty And Body; Printing; Optical And Photo;

Research And Laboratory; Jewelry And Accessories; Electronic And Computers; Safety

System; Aviation And Military;


Model DA7001 DA7002 DA7003 DA7004 DA7005
Voltage/Hz V 100-240 100-240 100-240 100-240 100-240
Hz 50/60 50/60 50/60 50/60 50/60
Power HP 1 2 3 4 5
KW 0.75 1.5 2.25 3 3.75
Max Air Flow L/min 152 304 456 608 760
CFM 5.37 10.74 16.10 21.47 26.84
Air Flow @7bar L/min 50 100 150 200 250
CFM 1.77 3.53 5.3 7.06 8.83
Max. Pressure Bar 8 8 8 8 8
psi 116 116 116 116 116
Tank L 30 50 70 100 140
Gallon 6.6 11.0 15.4 22.0 30.8
Net Weight Kg 29.5 50 78 95 110
Lbs 65.0 110.2 172 209.4 242.5
Gross Weight Kg 33 62.5 90 114.5 148
Lbs 72.8 137.8 198.4 252.4 326.3
Noise Level dB(A) ≤70 ≤70 ≤70 ≤70 ≤70
Max current A 3.4 6.8 10.2 13.6 17
Dimensions mm 410×410×650 710×425×730 920×425×725 1070×460×750 1430×460×730
inch 16.1×16.1×25.6 28×16.7×28.7 36.2×16.7×28.5 42.1×18.1×29.5 56.3×18.1×28.7


After-sales Service: Provided
Warranty: 2 Years
Lubrication Style: Oil-free
Cooling System: Air Cooling
Cylinder Arrangement: Dental Clinic
Cylinder Position: Horizontal


air compressor

How are air compressors employed in the petrochemical industry?

Air compressors play a vital role in the petrochemical industry, where they are employed for various applications that require compressed air. The petrochemical industry encompasses the production of chemicals and products derived from petroleum and natural gas. Here’s an overview of how air compressors are utilized in the petrochemical industry:

1. Instrumentation and Control Systems:

Air compressors are used to power pneumatic instrumentation and control systems in petrochemical plants. These systems rely on compressed air to operate control valves, actuators, and other pneumatic devices that regulate processes such as flow control, pressure control, and temperature control. Compressed air provides a reliable and clean source of energy for these critical control mechanisms.

2. Pneumatic Tools and Equipment:

Petrochemical plants often utilize pneumatic tools and equipment for various tasks such as maintenance, repair, and construction activities. Air compressors supply the necessary compressed air to power these tools, including pneumatic drills, impact wrenches, grinders, sanders, and painting equipment. The versatility and convenience of compressed air make it an ideal energy source for a wide range of pneumatic tools used in the industry.

3. Process Air and Gas Supply:

Petrochemical processes often require a supply of compressed air and gases for specific applications. Air compressors are employed to generate compressed air for processes such as oxidation, combustion, and aeration. They may also be used to compress gases like nitrogen, hydrogen, and oxygen, which are utilized in various petrochemical reactions and treatment processes.

4. Cooling and Ventilation:

Petrochemical plants require adequate cooling and ventilation systems to maintain optimal operating conditions and ensure the safety of personnel. Air compressors are used to power cooling fans, blowers, and air circulation systems that help maintain the desired temperature, remove heat generated by equipment, and provide ventilation in critical areas.

5. Nitrogen Generation:

Nitrogen is widely used in the petrochemical industry for applications such as blanketing, purging, and inerting. Air compressors are utilized in nitrogen generation systems, where they compress atmospheric air, which is then passed through a nitrogen separation process to produce high-purity nitrogen gas. This nitrogen is used for various purposes, including preventing the formation of explosive mixtures, protecting sensitive equipment, and maintaining the integrity of stored products.

6. Instrument Air:

Instrument air is essential for operating pneumatic instruments, analyzers, and control devices throughout the petrochemical plant. Air compressors supply compressed air that is treated and conditioned to meet the stringent requirements of instrument air quality standards. Instrument air is used for tasks such as pneumatic conveying, pneumatic actuators, and calibration of instruments.

By employing air compressors in the petrochemical industry, operators can ensure reliable and efficient operation of pneumatic systems, power various tools and equipment, support critical processes, and maintain safe and controlled environments.

air compressor

Can air compressors be used for inflating tires and sporting equipment?

Yes, air compressors can be used for inflating tires and sporting equipment, providing a convenient and efficient method for achieving the desired air pressure. Here’s how air compressors are used for these purposes:

1. Tire Inflation:

Air compressors are commonly used for inflating vehicle tires, including car tires, motorcycle tires, bicycle tires, and even larger truck or trailer tires. Air compressors provide a continuous source of pressurized air, allowing for quick and accurate inflation. They are often used in automotive repair shops, gas stations, and by individuals who regularly need to inflate tires.

2. Sporting Equipment Inflation:

Air compressors are also useful for inflating various types of sporting equipment. This includes inflatable balls such as soccer balls, basketballs, footballs, and volleyballs. Additionally, air compressors can be used to inflate inflatable water toys, air mattresses, inflatable kayaks, and other recreational items that require air for proper inflation.

3. Air Tools for Inflation:

Air compressors can power air tools specifically designed for inflation purposes. These tools, known as inflators or air blow guns, provide controlled airflow for inflating tires and sporting equipment. They often have built-in pressure gauges and nozzles designed to fit different types of valves, making them versatile and suitable for various inflation tasks.

4. Adjustable Pressure:

One advantage of using air compressors for inflation is the ability to adjust the pressure. Most air compressors allow users to set the desired pressure level using a pressure regulator or control knob. This feature ensures that tires and sporting equipment are inflated to the recommended pressure, promoting optimal performance and safety.

5. Efficiency and Speed:

Air compressors provide a faster and more efficient inflation method compared to manual pumps. The continuous supply of compressed air allows for quick inflation, reducing the time and effort required to inflate tires and sporting equipment manually.

6. Portable Air Compressors:

For inflating tires and sporting equipment on the go, portable air compressors are available. These compact and lightweight compressors can be easily carried in vehicles or taken to sports events and outdoor activities, ensuring convenient access to a reliable air supply.

It is important to note that when using air compressors for inflating tires, it is recommended to follow manufacturer guidelines and proper inflation techniques to ensure safety and avoid overinflation.

air compressor

How do oil-lubricated and oil-free air compressors differ?

Oil-lubricated and oil-free air compressors differ in terms of their lubrication systems and the presence of oil in their operation. Here are the key differences:

Oil-Lubricated Air Compressors:

1. Lubrication: Oil-lubricated air compressors use oil for lubricating the moving parts, such as pistons, cylinders, and bearings. The oil forms a protective film that reduces friction and wear, enhancing the compressor’s efficiency and lifespan.

2. Performance: Oil-lubricated compressors are known for their smooth and quiet operation. The oil lubrication helps reduce noise levels and vibration, resulting in a more comfortable working environment.

3. Maintenance: These compressors require regular oil changes and maintenance to ensure the proper functioning of the lubrication system. The oil filter may need replacement, and the oil level should be regularly checked and topped up.

4. Applications: Oil-lubricated compressors are commonly used in applications that demand high air quality and continuous operation, such as industrial settings, workshops, and manufacturing facilities.

Oil-Free Air Compressors:

1. Lubrication: Oil-free air compressors do not use oil for lubrication. Instead, they utilize alternative materials, such as specialized coatings, self-lubricating materials, or water-based lubricants, to reduce friction and wear.

2. Performance: Oil-free compressors generally have a higher airflow capacity, making them suitable for applications where a large volume of compressed air is required. However, they may produce slightly more noise and vibration compared to oil-lubricated compressors.

3. Maintenance: Oil-free compressors typically require less maintenance compared to oil-lubricated ones. They do not need regular oil changes or oil filter replacements. However, it is still important to perform routine maintenance tasks such as air filter cleaning or replacement.

4. Applications: Oil-free compressors are commonly used in applications where air quality is crucial, such as medical and dental facilities, laboratories, electronics manufacturing, and painting applications. They are also favored for portable and consumer-grade compressors.

When selecting between oil-lubricated and oil-free air compressors, consider the specific requirements of your application, including air quality, noise levels, maintenance needs, and expected usage. It’s important to follow the manufacturer’s recommendations for maintenance and lubrication to ensure the optimal performance and longevity of the air compressor.

China wholesaler CHINAMFG Portable Oil Free Air Compressors (DA7003D)   wholesaler China wholesaler CHINAMFG Portable Oil Free Air Compressors (DA7003D)   wholesaler
editor by CX 2023-10-27