Tag Archives: water lubrication air compressor

China Hot selling Portable 40 Bar Rotary Electric Head Transmission Rotary Screw Air Compressor Oil Free Water Lubrication Oil-Less Machines Industrial Equipment Compressor air compressor for car

Product Description

Portable 40 bar rotary electric head transmission rotary Screw Air Compressor Oil free water lubrication oil-less machines industrial equipment compressor

Main uses and guarantees:

Energy saving: saving more than 15% compared to dry oil-free compressors.
Environment protection: no using any lubricated oil to avoid environmental pollution.
Reliability: absolutely guarantee oil-free.

Because the purified water takes part into the compressing process to seal, cool, and lubricate, it increases efficiency. With the same motor power, compared with dry oil-free air compress, there is 15% more air production of oil-free screw air compressor of water lubrication, it reduces energy consumption greatly. The consumption material of an oil-free screw air compressor is only water, air filter and water filter, the maintenance cost is very low.

100% oil-free compressed air, 100% purified compressed air, 100% no oil pollution risk.

In the process of food and drink industry, medical industry, packing industry, electronic manufacture, painting industry, powder coating industry and textile manufacturing, it must avoid any risk of oil pollution, otherwise it would cause serious consequences such as manufacture damages and stop, brand and credit losing. CMN oil-free screw air compressor takes water for lubrication, there is not any lubricate oil in the air end, and at the meantime, because the purified water clean the air, the compressor air is absolutely clear and not any pollution. 

Guarantee: High precision, high wear resistance, low noise, smooth and steady, high strength

Our product can be adapted. Please give us the required model name so we can provide you the most accurate quotation.

This chart if for reference, if you need different features, provide us all relevant details for your project and we will be glad to help you finding the product matching your need at the best quality with the lowest price.

Please note the price and the MOQ may vary regarding the product you chose: do not hesitate to contact us to know more!



Engine model Kw/rpm 135.5/2150
No. of cylinders Kw/rpm 637/1800
Net Power L 6.494

Main performance parameters

Main performance parameters km/h 5.9/4.0
Travel speed (max. & min.) ° <=35
Max. Gradeability rpm 11.3

Hydraulic system

Hydraulic system KPa 50.1
Main pump KN 161
Rate flow KN 125

Main Features

1) Simple structure in linear type ,easy in installation and maintation. 
2) Adopting advanced world famous brand components in pneumatic parts ,electric parts and operation parts. 
3) High pressure double crank to control the die opening and closing. 
4) Running in a high automatization and intellectualization,no pollution 
5) Apply a linker to connect with the air conveyor ,which can directly inline with filling machine . 

company information


After-sales Service: Installation Guide 1-Year Warranty
Warranty: 1 Year
Lubrication Style: Oil-free
Cooling System: Water Cooling
Power Source: DC Power
Cylinder Position: Horizontal
US$ 999/Piece
1 Piece(Min.Order)

Request Sample

air compressor

Can Oil-Free Air Compressors Be Used for Breathing Air Applications?

Yes, oil-free air compressors can be used for breathing air applications, but it is crucial to ensure that the compressor and the associated equipment meet the required standards and regulations for breathing air quality and safety. Here’s a detailed explanation of using oil-free air compressors for breathing air applications:

1. Compressor Design and Certification:

When considering the use of oil-free air compressors for breathing air applications, it is essential to select compressors that are specifically designed and certified for such purposes. Dedicated oil-free compressors designed for breathing air applications typically incorporate additional features and safeguards to ensure the production of clean and safe compressed air. These compressors undergo rigorous testing and certification processes to meet the stringent standards and regulations for breathing air quality.

2. Air Treatment and Filtration:

In breathing air applications, the compressed air must undergo thorough treatment and filtration to remove contaminants and ensure its safety for breathing. Oil-free compressors are typically equipped with advanced filtration systems, including pre-filters, coalescing filters, activated carbon filters, and sometimes additional stages such as sterile filters or high-efficiency particulate air (HEPA) filters. These filtration stages work together to eliminate particulates, moisture, odors, oil vapors, and other potential contaminants from the compressed air, ensuring its suitability for breathing air applications.

3. Compliance with Breathing Air Standards:

Oil-free compressors used for breathing air applications must comply with specific standards and regulations that define the acceptable limits for contaminants in breathing air. International standards such as ISO 8573 and national regulations, such as the Occupational Safety and Health Administration (OSHA) standards in the United States, set guidelines for breathing air quality and specify the maximum allowable levels of contaminants, including oil content, particulate matter, and moisture. Compressors used for breathing air applications should meet or exceed these standards to ensure the safety and health of individuals who rely on the compressed air for breathing.

4. Regular Maintenance and Monitoring:

To ensure the ongoing safety and quality of the breathing air produced by oil-free compressors, regular maintenance and monitoring are essential. This includes routine inspections, filter replacements, and adherence to recommended maintenance schedules. Regular monitoring of air quality parameters, such as oil content, oxygen levels, and microbiological contamination, can help identify any potential issues and ensure that the compressor continues to produce clean and safe breathing air.

It’s important to note that not all oil-free compressors are suitable for breathing air applications. It is necessary to select compressors specifically designed and certified for this purpose, ensuring they meet the required standards and regulations. Additionally, the entire breathing air system, including air storage cylinders, distribution lines, and breathing apparatus, must also meet the necessary safety standards and undergo regular inspections and maintenance.

By following these guidelines and using appropriately designed and certified oil-free compressors, it is possible to generate clean and safe breathing air for various applications, such as medical facilities, diving operations, firefighting, and respiratory protection in industrial settings.

air compressor

Are There Any Specific Safety Considerations When Using Oil-Free Compressors?

Yes, there are specific safety considerations that should be taken into account when using oil-free compressors. Here’s a detailed explanation of the safety considerations associated with oil-free compressor operation:

1. Electrical Safety:

Oil-free compressors are powered by electricity, so electrical safety measures should be followed. It is important to ensure that the compressor is properly grounded and connected to a suitable power source. Electrical wiring and connections should be inspected regularly to identify any potential hazards such as frayed wires or loose connections. Adequate circuit protection, such as fuses or circuit breakers, should be in place to prevent overloads or short circuits. All electrical work should be performed by qualified personnel in compliance with applicable electrical codes and regulations.

2. Pressure Safety:

Compressed air generated by oil-free compressors can reach high pressures, and proper pressure safety measures should be in place. Pressure relief valves are essential components that protect the compressor and the entire compressed air system from overpressurization. These valves should be properly sized, regularly inspected, and tested to ensure they operate within the specified pressure limits. Pressure gauges should be installed to monitor and display the pressure levels accurately. It is important to avoid exceeding the maximum pressure rating of the compressor and to follow the manufacturer’s guidelines regarding pressure limitations.

3. System Ventilation:

Oil-free compressors generate heat during operation, and adequate ventilation is necessary to prevent overheating. Sufficient airflow around the compressor unit should be maintained to dissipate heat effectively. The compressor should be installed in a well-ventilated area, and any obstructions that could restrict airflow should be avoided. Inadequate ventilation can lead to increased operating temperatures, reduced compressor performance, and potential safety hazards. Manufacturers’ recommendations regarding ventilation requirements should be followed.

4. Preventing Injuries:

When working with oil-free compressors, certain precautions can help prevent injuries. It is important to wear appropriate personal protective equipment (PPE), such as safety glasses, hearing protection, and gloves, when operating or maintaining the compressor. Loose clothing, jewelry, or other items that could get caught in moving parts should be avoided. Compressed air should never be directed towards the body or other individuals, as it can cause serious injuries, such as cuts, bruises, or even pneumothorax. Proper training and clear instructions for safe operation should be provided to all personnel working with the compressor.

5. Maintenance and Inspection:

Regular maintenance and inspection of oil-free compressors are essential for safe operation. The compressor should be inspected for any signs of damage, leaks, or abnormal vibrations. Routine maintenance tasks, such as filter replacements, should be performed according to the manufacturer’s recommendations. Maintenance procedures should be carried out with the compressor turned off and isolated from the power source. Only authorized personnel with the necessary training and knowledge should perform maintenance tasks on the compressor to ensure proper safety protocols are followed.

6. Emergency Preparedness:

Being prepared for potential emergencies is crucial when using oil-free compressors. Emergency shutdown procedures should be established and clearly communicated to all personnel. Adequate fire suppression equipment, such as fire extinguishers, should be readily available and properly maintained. In the event of a compressor-related incident, personnel should be trained on emergency response protocols and evacuation procedures.

It is important to consult the manufacturer’s documentation and guidelines for specific safety considerations related to the oil-free compressor model being used. Additionally, adherence to relevant safety regulations and standards, as well as regular safety training and awareness programs, further contribute to maintaining a safe working environment when using oil-free compressors.

air compressor

How Does an Oil-Free Air Compressor Work?

An oil-free air compressor, also known as an oilless air compressor, operates using alternative methods to achieve compression without the need for lubricating oil. These compressors employ various techniques to deliver clean, oil-free compressed air. Here’s a detailed explanation of how an oil-free air compressor works:

1. Dry Compression:

In oil-free air compressors, the compression chamber is designed to operate without any oil present. The compression process starts with the intake stroke, where ambient air is drawn into the compressor through an inlet valve. The air is then compressed in the compression chamber without any oil lubrication.

2. Friction Reduction:

Since there is no oil in the compression chamber, special measures are taken to reduce friction and wear between the moving parts. These measures include the use of specialized materials, coatings, and surface treatments on the compressor components. These friction-reducing techniques minimize the need for lubrication and allow for efficient compression.

3. Piston Rings and Seals:

Oil-free compressors utilize advanced piston rings and seals to provide effective sealing without the need for oil lubrication. These rings and seals are designed to reduce internal leakage and ensure efficient compression. They help maintain the compression efficiency by minimizing air leakage during the compression process.

4. Cooling Mechanisms:

Oil-free air compressors often incorporate cooling mechanisms to dissipate the heat generated during compression. This helps prevent overheating and ensures the compressor operates within acceptable temperature limits. Common cooling methods include water cooling and air cooling. Water-cooled compressors use a water jacket or a separate cooling circuit to remove heat, while air-cooled compressors rely on fans and heat sinks to cool the compressor.

5. Filtration:

Oil-free compressors typically incorporate effective air filtration systems to remove contaminants, such as dust, particles, and moisture, from the intake air. These filtration systems ensure that the compressed air produced is clean and free from impurities. Depending on the application, additional filtration equipment, such as coalescing filters or activated carbon filters, may be employed to achieve specific air quality requirements.

6. Control and Safety Systems:

Oil-free air compressors are equipped with control and safety systems to monitor and regulate the compressor’s operation. These systems can include pressure switches, temperature sensors, safety valves, and control panels. They help maintain optimal operating conditions, protect the compressor from excessive pressures or temperatures, and provide safety features to prevent damage or accidents.

By employing these techniques and components, oil-free air compressors achieve compression without the need for lubricating oil. This results in clean, oil-free compressed air that is suitable for applications where oil contamination could be problematic, such as in industries like food processing, pharmaceuticals, electronics, and painting.

It’s important to note that the specific design and operation of oil-free air compressors may vary depending on the manufacturer and model. Therefore, it’s recommended to consult the manufacturer’s documentation and guidelines for detailed information on how a particular oil-free compressor works.

China Hot selling Portable 40 Bar Rotary Electric Head Transmission Rotary Screw Air Compressor Oil Free Water Lubrication Oil-Less Machines Industrial Equipment Compressor   air compressor for carChina Hot selling Portable 40 Bar Rotary Electric Head Transmission Rotary Screw Air Compressor Oil Free Water Lubrication Oil-Less Machines Industrial Equipment Compressor   air compressor for car
editor by CX 2023-10-03

China manufacturer Soundproof Water Lubrication Oil-Free Single Stage Pm VSD Rotary Screw Type Air Compressor for Vehicles Painting with Good quality

Merchandise Description


one. Low temperature signifies far more effectiveness
With an extremely reduced working temperature of considerably less than 60ºC, near isothermal compression is reached. 
The exceptional cooling ability of h2o removes the heat and presents a lot more air per kW of power.
This also eradicates the want for an inside cooler and aftercooler, the CZPT electricity consumption reduces strain drop to a minimum.

2. Reducing the maintenance cost
Spare parts only require air filter elements and water filter components
Reduced running temperature guarantees the long services lifestyle of the screw air end, staying away from expensive maintenance expenses for the screw rotor.
Low temperature decreases the pressure on other factors ensuring lengthy lifestyle.

3. Keeping away from the costs of added CZPT to battle strain drop
These expenses, although not evident at the time of acquire, are extremely substantial and lead considerably to the total cost of ownership.

4. No Gearbox No require for CZPT oil lubrication.

5. Straightforward structure 
Less relocating components than the dry oil-cost-free screw air compressor, that means there is less to go wrong, 
while harmony bearing loads extend the compression element support daily life for reduced-value procedure. 


Solution Parameters


Product Description


Organization Profile



Very hot Sale Items




           2~10bar Oil-injected                        7~16bar All-in-1                       Small Solitary-phase
       Screw Air Compressor                   Screw Air Compressor                 Screw Air Compressor  


         two~40bar a hundred% Oil-free                   8~12bar one hundred% Oil-free                Diesel Engine Moveable
       Screw Air Compressor                   Scroll Air Compressor                 Screw Air Compressor  



Primary Item


What we can provide:

* Oil-injected Screw Air Compressor (2~sixteen bar)
* All-in-1 Screw Air Compressor with Tank, Dryer, and Filters (7~sixteen bar)
* One-section Modest Screw Air Compressor for Property use (8~10 bar)
* Water-injected Oil-free of charge Screw Air Compressor (2~40 bar)
* Oil-free Scroll Air Compressor (8~twelve bar)
* Diesel&Electric powered Motor Moveable Screw Air Compressor (8~30 bar)
* Air Dryer, Air tank, Filters, and other Spare parts


How to Decide on the Appropriate Air Compressor

An air compressor makes use of pressurized air to electrical power a selection of tools. They are most generally utilized to electricity nailers and effect wrenches. Other popular utilizes for air compressors incorporate paint sprayers and influence wrenches. Whilst all air compressors have the identical standard building, their specialty differs. Ultimately, their distinctions appear down to the amount of air they can press. Go through on for info on each and every variety of air compressor. These equipment are fantastic for numerous diverse purposes, and deciding on the correct air compressor depends on your distinct wants.

Electrical motor

While getting an electric powered motor for air compressor, compatibility is a key element. Not all motors operate with the very same kind of air compressor, so it is critical to examine the manufacturer’s instructions before getting. By carrying out this, you can keep away from throwing away money on an incompatible motor. Another critical thought is speed. A motor’s velocity is its price of rotation, measured in revolutions per moment. It is crucial that you purchase a motor with ample speed to meet the wants of your air compressor.
Usually, an electric motor for air compressor is 1.5 hp. It is perfect for use with medical equipment and steel-chopping devices. It also performs effectively underneath ongoing procedure and delivers a high effectiveness and power-preserving efficiency. Additionally, it attributes an eye-catching value, creating it a good option for a vast assortment of purposes. If you are hunting for a motor for an air compressor, search no further than a ZYS sequence.
A motor’s security class indicates how the motor will run. Protection lessons are specified by the IEC 60034-5. These are stated with two digits and signify the security against sound objects and h2o. For instance, an IP23 rating implies that the motor will be guarded from sound objects, even though IP54 signifies that it will defend from dust and water sprayed from all directions. It is crucial to choose a motor with the proper safety course for your air compressor.
When picking an electrical motor, you need to consider no matter whether it really is compatible with the manufacturer of air compressor. Some may possibly be appropriate, although other folks may possibly need advanced electronics abilities to mend. Nevertheless, most air compressors are coated by guarantee, so it’s critical to check with the manufacturer if the guarantee is nevertheless in impact before you invest a dime on a replacement. The motor ought to be replaced if it has failed to execute as created.

Oil bathtub

Air compressors need suitable lubrication to perform efficiently. The piston must attract air with nominal friction. Based on their design, air compressors can possibly be oil-lubricated or oil-free. The previous employs oil to minimize piston friction, while the latter splashes it on the cylinder bearings and walls. These kinds of air compressors are generally acknowledged as oil-flooded air compressors. In purchase to preserve their oil baths clear, they are advised for use in locations with high dust amounts.

Begin/stop manage

An air compressor can be controlled by a start off/stop management. This sort of control sends a signal to the main motor that activates the compressor when the demand for air falls under a preset limit. This manage approach is effective for scaled-down air compressors and can be valuable for lowering strength fees. Begin/end control is most successful in programs where air stress does not alter frequently and exactly where the compressor is not required to run continuously.
To troubleshoot this issue, you require to verify the electricity source of your compressor. To verify the offer aspect, use a voltage monitor to establish if electricity is flowing to the compressor. Make sure that the power provide to the compressor is steady and steady at all times. If it fluctuates, the compressor may not start or stop as predicted. If you can not find the problem with the air compressor electrical power offer, it might be time to exchange it.
In addition to the commence/quit control, you may want to purchase further air receivers for your air compressor. These can enhance the potential of air stored and reduce the number of moments it commences and stops. Yet another way to lessen the number of commences for each hour is to incorporate far more air receivers. Then, you can alter the management to match your requirements. You can also set up a force gauge that displays the compressor’s efficiency.
Start off/cease handle for air compressors can be complicated, but the standard parts are fairly effortless to realize. 1 way to test them is to turn the compressor on or off. It is typically situated on the exterior of the motor. If you happen to be unsure of the area of these factors, check out the capacitors and make certain that the air compressor is not operating whilst you are not employing it. If it does, attempt to get rid of the capacitor.
Variable displacement handle is yet another way to alter the sum of air flowing into the compressor. By managing the quantity of air, the manage can hold off the use of additional compressors until more necessary air is accessible. In addition to this, the gadget can also monitor the power utilized in the compressor. This handle technique can end result in considerable strength cost savings. You can even save on the amount of electric power by using variable displacement management. It is vital for efficient compressed air methods.

Variable pace drive

A VFD, or variable frequency push, is a variety of electric motor that adjusts its pace to match the need for air. It is an productive way to lessen strength costs and enhance system reliability. In truth, scientific studies have demonstrated that a twenty% reduction in motor speed can help save up to fifty% of power. In addition, a VFD can keep track of additional variables this kind of as compressor oil pressure and motor temperature. By reducing guide checks, a VFD will improve the functionality of the application and reduce running expenses.
In addition to lowering vitality expenses, variable-velocity drives also enhance productivity. A variable-velocity air compressor lowers the danger of method leaks by 30 percent. It also minimizes the chance of method leaks by lowering stress in the system. Due to the fact of these positive aspects, many governments are marketing this technologies in their industries. Many even supply incentives to aid organizations upgrade to variable-speed drives. For that reason, the variable-pace travel can reward many air compressor installations.
A single main benefit of a variable-velocity travel is its capacity to enhance vitality use. Variable frequency drives are ready to ramp up and down to match the demand for air. The goal is to optimize the stress and stream in the system so that the very best “lifeless band” takes place between forty percent and eighty % of entire load. A variable-pace compressor will also enhance energy performance due to the fact of its programmability.
A variable-speed air compressor can also be utilized to handle the sum of air that is compressed by the program. This attribute adjusts the frequency of electricity equipped to the motor primarily based on the demand. If the desire for air is reduced, the frequency of the motor will lessen to preserve vitality. On the other hand, if there is an surplus desire for air, the variable-velocity compressor will boost its pace. In addition, this type of air compressor is more productive than its fixed-velocity counterpart.
A VFD has a lot of advantages for compressed air methods. 1st, it assists stabilize the strain in the pipe community, therefore reducing the power losses due to upstream strain. It also assists minimize the power usage brought on by fluctuations in upward pressure. Its rewards are also significantly-achieving. And as long as the air force and air source is properly sized, a VFD will support optimize the effectiveness of compressed air methods.

China manufacturer Soundproof Water Lubrication Oil-Free Single Stage Pm VSD Rotary Screw Type Air Compressor for Vehicles Painting     with Good qualityChina manufacturer Soundproof Water Lubrication Oil-Free Single Stage Pm VSD Rotary Screw Type Air Compressor for Vehicles Painting     with Good quality