First, it’s important to understand the specs of air compressors:
CFM and PSI are the most important to consider. Together, they determine which pneumatic tools you can operate and how well they'll perform. For example, a typical 1/2-inch impact wrench requires around 4-5 CFM at 90 PSI to function effectively.
Tank size affects the duration you can use the compressor without interruption. A larger tank (20 gallons or more) is ideal for jobs that require continuous airflow, such as spray painting.
It may be tempting to focus on horsepower, but it's less critical to performance than CFM and PSI. Still, models with higher horsepower can refill the air tank faster, reducing downtime during demanding tasks.
If you plan to run multiple tools at once, make sure to add up each tool’s requirements to ensure the compressor can handle the total load.
Before you start shopping for specific models, it’s important to consider how you’ll use the air compressor. Assess your workspace and your needs.
Portable air compressors are small, lightweight and typically more affordable. They come in many different shapes, sizes and outputs, however, they usually have smaller tanks and less output, so they may not be robust enough for heavy-duty applications.
Prices range from about $50 for mini or tire inflators to $1,500 for industrial-grade wheelbarrow units.
Stationary air compressors are larger units designed to stay in one place. They have bigger tanks and more power, so they can run high-demand tools like spray guns and sanders for longer periods. Here are the most common types of stationary air compressors:
Stationary compressors are more expensive and require a dedicated space and sometimes special wiring. Prices range from about $500 to $2,000.
Oil-lubricated compressors are built for heavy-duty use and prolonged operation. They’re great for running tools that demand a steady, powerful air supply. Since they use oil to keep their internals lubricated and cool, they tend to run more quietly and last longer. However, because the oil circulates close to the compressed air, tiny oil particles can sometimes end up in the airflow. This isn’t an issue for most automotive work, but if clean air is essential (like when spray painting), look for models with filters or separators to minimize oil in the output.
Oil-free compressors are great for tasks that require a clean air supply. They use a low-friction coating instead of oil for internal lubrication, eliminating any risk of oil mixing with the air. They also don’t require oil changes. However, oil-free models can be louder and may wear out faster due to the increased friction and heat inherent to their design.
Air compressors can be noisy: Whether they are oil-free or not. If that's a concern, check the decibel rating of each model you're considering. For a quieter experience, look for models rated under 80 decibels.
Through this article, we can help you understand the basic knowledge of the Portable Air Compressor, benefits of portable air compressor, the industrial applications, the main technical parameters, how to select the portable air compressor according to these parameters.
Industrial Applications: Mobile screw air compressors are widely used in mining, water conservancy, transportation, shipbuilding, urban construction, energy, military and other industries, such as Drilling and blasting market, open pit mine, water conservancy and hydro-power construction, coal-bed methane market, municipal air compressor, oil pipeline pressure test air compressor, oil/gas pipeline cleaning, sandblasting and rust removal, large-diameter embedded rock foundation piles, oil and gas wells , Coal-bed methane wells, mining area gas drainage wells, water wells, geothermal wells, geothermal air-conditioning wells, geological exploration holes, large-diameter reverse circulation holes, foundation piles and other entire drilling industries. Dream Compressor provide multi-faceted solutions and provide air compressor system and aerodynamic solutions for oil, natural gas, coal-bed methane, mining, municipal construction, geological exploration, pipeline construction, water well construction and other fields.
The main advantages of portable screw air compressor
● High reliability: The screw air compressor has fewer parts and wearing parts, so it runs reliably and has a long life.
● Convenient operation and maintenance: The operator does not need to go through long professional training, can realize unattended operation, the operation is relatively simple, and the air can be supplied according to the required exhaust volume.
● Good power balance: The screw air compressor has no unbalanced inertial force, and the machine can work smoothly and at a high speed, and can realize no-base operation. It is especially suitable for use as a mobile compressor, with small size, light weight and less floor space.
● Strong adaptability: The screw air compressor has the characteristics of forced air delivery, the air displacement is almost not affected by the exhaust pressure, the operation is stable, the vibration is small, the exhaust is stable, and it can maintain high efficiency in a wide range.
● Multi-phase mixed transportation: There are actually gaps between the tooth surfaces of the rotor of the screw air compressor, so it can withstand the impact of liquids, and can deliver liquid-containing gas, dust-containing gas, easy-to-polymerize gas, etc.
Main disadvantage
● The running noise is large, and noise reduction equipment should be installed under normal circumstances.
● Due to its strong balance and high-speed operation, the power consumption is relatively high.
● The screw gap will become larger after long-term operation, and regular repair or replacement costs more.
Technical parameters
● Main motor: Motor power 37- 250kw
● Power : 380V/50Hz/3ph
● Service factor: 1.15
● The protection grade is IP54, which is more suitable for the dusty environment in the wild
● Dashboard layout
● Digital voltmeter
● Digital Ammeter
● Main engine exhaust pressure gauge
● Main engine exhaust temperature gauge
● Hour meter
● Power Indicator
● Unit operation indicator
● Oil filter clogged indicator
● On/off control and continuous adjustment control switch
● Unit loading switch
● Pressure switch before and after separation
● start up button
● Stop button
● Main engine exhaust system
● The connection pipe port between the main engine exhaust and the oil separator body is changed to flange connection, which can more effectively prevent the oil leakage problem in the long-term use of the high-pressure single-stage unit.
Air supply system
One 2" ball valve and 3 1/4 ball valves, enough for users to connect to equipment of various sizes
Conical R thread is easier to seal, has a long life, and is not easy to leak
Reduce the exhaust resistance on the side of the separator
Temperature control valve
The temperature control valve can effectively prevent the temperature control element from malfunctioning or non-operation (seizure), ensuring that the compressor runs at a suitable temperature range, and more reliably prolongs the service life of the lubricating oil and the main engine.
power box
● The old-fashioned air switch is a manual switch. The higher the voltage, the more difficult it is to open and close.
● The electromagnetic air switch used in this unit can be easily dialed by hand, or can be controlled by buttons, and is equipped with a circuit breaker at the same time, which greatly increases safety
Intake system
● Stepless air intake adjustment system can be adjusted within 0-100%
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● The outer cover of the unit is designed according to the cold box principle
● It can form an efficient cooling air flow, and the working environment temperature is up to 52℃
● Machine safety lifting eyes
● Single point lifting and locking protection to prevent unauthorized movement
Intake filter system
The equipment is equipped with a two-stage air filtration system to ensure that the air compressor is free from dust and dirty particles. When the filter needs to be replaced, the Yinni display will alert you in time.
Self-designed cooling system
● High-performance plate-fin cooler
● Increased cooling area margin to ensure cooling effect
● The maximum operating environment temperature can be as high as 52℃
● (The motor specification recommends not to run for a long time in an environment higher than 46°C)
Safety protection
● High compressor discharge temperature protection: >120℃
● Main motor overload protection
● Fan motor overload protection
● Power phase sequence error or phase loss protection
● Oil filter clogged alarm
● Electric control box
● Large-capacity contactor can adapt to unstable voltage conditions in the field
● Waterproof cabinet design
● Large internal space, good heat dissipation performance of components
Power box
● Water-proof design box can prevent rainwater from entering when the machine is stopped (it is not allowed to start the machine when it is raining)
● Wire entry from the lower part, convenient for wiring, while keeping the distance from the surrounding staff to ensure personal safety
Maintenance
● Front and rear service doors for easy maintenance
How to select the portable air compressor
1. Model selection will be based on actual air use requirement
Combining the needs of customers, finding the best operating economy, and expanding the scale in the future will require a lot of decisions. The basis of the decision is the purpose or use process of compressed air. It focuses on calculating the air demand, reserves and room for future expansion. Pressure and flow are both decisive factors and have a great impact on energy consumption. Different pressure ranges and different The flow conditions of different compressors may sometimes be economical.
Commonly used international standards for selection are: AP, AP, AP, AP, AP, AP.
2. Calculation of work pressure
The equipment that compresses the gas determines the necessary working pressure depends on the compressor, equipment, pipeline, the highest working pressure determines the necessary device pressure, and the air consumption location uses a pressure reducing valve to meet the equipment requirements, in extreme cases, a A single air compressor is very uneconomical.
Working pressure: end user + final stage filter + piping system + dust particle filter + dryer + compressor adjustment range
The higher the pressure, the greater the power consumption, and the pressure drop caused by the size and length of the piping must be considered. List the operating pressures of various models. If the operating pressures are too different, you must purchase air compressors with different pressures. Do not use at reduced pressures to increase costs.
3. Calculation of air demand
Compressed gas is a clean power that converts electrical energy into air potential energy and uses the expansion of compressed air to do external work. However, it consumes a lot of electrical energy. Generally speaking, the electric energy required to compress 1m? of air to 0.7MPa is about 7kW. According to statistics, the power consumption of the air compressor station accounts for about 20% of the total power consumption of the entire enterprise. This means that saving compressed air and rationally using compressed air will bring you new profit margins!
Air consumption: Combine all tools + machinery and equipment + relevant process air consumption + leakage + wear + future air consumption + usage coefficient (standard value 20%)
Fourth, the number of compressors and the determination of specifications
According to the required degree of flexibility + control system + energy efficiency
(1) Choose one big machine or multiple small machines?
The cost of downtime during production, the utilization rate of electricity, the change of load (load), the cost of the compressed air system, and the available floor space. Due to cost reasons, only one compressor is used to supply all the air in a device, so this system can prepare a quick interface of a mobile compressor for connection when it is used, and an old air compressor can be used as an inexpensive The reserve power provides the reserve gas source.
(2) Stability (an issue that has always been very important);
(3) Energy consumption expenditure
● Piping leaks;
● The demand for air fluctuates every moment (this is the most neglected and the most serious)
● The output efficiency of a single machine (choose the model with the best range of output efficiency)
(4) standardization of spare parts
The optimal combination of multiple 110KW models may be 40-160m³/min, the best choice for the air range.
(5) Operational analysis
It should be observed within one week, and more than 90% of the measured energy recovery is recovered. During a certain period of time, the working pressure often drops. The control system can be modified with reference to the changes in production to improve the use of the air compressor. Another factor is to check for air leaks.
Pay attention to the ratio of energy consumption to save power: actual displacement/actual motor power consumption, the larger the value, the more power consumption.
Conclusion:
Offering the power of diesel with the convenience of portable compressors, the portable diesel air compressor is a great mix of form and function. Available in a number of sizes and horsepower, there is a portable diesel air compressor to fit every need, regardless of your industry.
Plus, these air compressors are perfect for temporary jobs and for industries in which you must transport your equipment. Reliable, durable, and easy to hook up to a truck, a high-quality portable diesel air compressor is worth its weight in gold.
If you're looking for a portable diesel or electric air compressor, Our Dream Compressor can help you. We offer a wide variety of models, as well as different configurations of the portable diesel air compressor.
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