China best Rotary Combined Silent Screw Air Compressor WAC-20A with Air Tank air compressor lowes

Product Description

Product Description

1. Large displacement: Displacement 10% higher than ordinary piston compressor.
2. Energy-saving: Compared with piston air compressor, this series of models for the new national standard 2 energy efficiency products, excellent energy saving.
3. Easy to operate: 24 hours unattended all day work, free load automatically start, full load automatically shut down.
4. Strong stability:Under long time working, displacement and pressure stable, no crash phenomenon, low failure rate.

Application Industry:
Air compressors belong to the general equipment category and are widely used in steel, electric power, metallurgy, shipbuilding, textiles, electronics, chemicals, petroleum, mining, light industry, machinery manufacturing, paper printing, transportation facilities, food and medicine, casting and spraying, shipping terminals, technology, automotive technology, automotive industry, aerospace, infrastructure and other fields.


DBZY Series(Combined with air dryer and tank) Screw Compressor 
DHH Air flow Capacity(m3/min)/cfm Power Noise Diameter Dimension Weight
0.7Mpa 0.8Mpa 1.0Mpa 1.3Mpa 1.6Mpa KW/HP DB(A) INCH W×D×H mm Kg
MODEL m3/min cfm m3/min cfm m3/min cfm m3/min cfm m3/min cfm          
WAC-7.5A 0.91 32.1 0.84 29.6 0.75 26.5 0.63 22.2 / / 5.5/7.5 65 G3/4” 1230×600×1262 375
WAC-10A 1.3 45.9 1.2 42.4 1 35.3 0.84 29.6 0.55 19.4 7.5/10 65 G3/4” 1230×600×1262 395
WAC-15A 1.7 60 1.6 56.5 1,4 49.4 1.2 42.4 1.05 37.1 11, 15 65 G3/4” 1470×800×1615 500
WAC-20A 2.4 84.8 2.3 81.2 2 70.6 1.6 56.5 1.51 53.3 15/20 68 G3/4” 1470×800×1615 530



Detailed Photos


Company Profile

WMT CNC Industrial Co., Ltd. is located in the southwest of the Yangtze River in ZheJiang Province with famous Buddhist shrine in the north of Jiuhua Mountain. The transportation facilities here are very convenient, directly linked with many metropolis like ZheJiang , ZheJiang and HangZhou via the highway, international airport, and high-speed railway.

WMTCNC company focuses on the research and development, manufacturing, sales and service of various CNC machine tools. Our products are widely used in the processing of molds and parts for products in the aerospace, automotive, steel, petrochemical, and electronics industries. The products are exported to more than 50 countries and regions around the world with good reputation always.
Our main products are Vertical machining centers, Gantry machining centers, CNC milling machines, CNC lathes, Turning machining centers, common drilling and milling machines, milling machines, lathes, and DIY machine tools, etc.
Main functional components of machines are supplied by world-renowned brands such as Japan, ZheJiang and Germany. The concept of combining “craftsman spirit” and “intelligent manufacturing” runs through the research and development, production and sales of various products, relying on advanced processing And testing equipment, scientific management to ensure our products with the high precision, high rigidity and high efficiency. Our machines are the trustworthy product for mold and metal processing.


Q1: How is the warranty?
A1: Warranty time is 13 months after BL date.

Q2:Can we visit your factory before order?
A2:Sure.All new and old friends are welcomed to visit us at our factory. Besides,we can pick up you at the station or airport if needed. We will be very honored to help with tickets and accommodation booking.

Q3:Do you have a stock?
A3:Sorry, most of our machines don’t have stock, we always produce according to order. However, if during fairs months, maybe have few samples back from fairs.

Q4:What’s the MOQ?
A4:One set only.

Q5:How about your quality?
A5:We have approved the ISO9001:2008 Quality management system.ISO14001 Environmental management system, OHSAS18001 International occupational health and safety management system, and Social Accountability 8000(SA8000). Most products have been approved by the European and American safety standards, including CE, GS, EMS&UL,90% of our products are exported to more than 60 countries and regions around the world, especially to Europe and America market and always win high reputation. So you can rest assured of our quality products and our best services.

Q6:Do you have professional engineers?
A6:Yes.we have professional engineers and designers. We can provide OEM services.

Q7:Can you provide customized machines?
A7:Yes, we can design and manufacture according to your specific requirements.
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After-sales Service: Video technical support, Online support
Warranty: 1 Year
Lubrication Style: Lubricated
Cooling System: Water Cooling
Power Source: motor
Cylinder Position: Vertical


air compressor

Are There Oil-Free Screw Compressors Available?

Yes, oil-free screw compressors are available in the market to cater to applications where oil contamination is a concern. Here’s a detailed explanation:

Oil-free screw compressors, as the name suggests, are designed to operate without the use of lubricating oil in the compression chamber. These compressors offer several advantages in industries where oil-free compressed air or gas is required, such as in food and beverage, pharmaceutical, electronics, and certain manufacturing processes.

The key features and considerations of oil-free screw compressors include:

  • 1. Specialized Design: Oil-free screw compressors are designed with specialized materials, coatings, and sealing systems to eliminate the need for lubricating oil in the compression process. The rotors and other internal components are constructed to ensure minimal friction and wear, even in the absence of oil.
  • 2. Dry Compression: Unlike lubricated screw compressors, oil-free screw compressors rely on dry compression methods. The compression chamber is designed to achieve compression without the presence of oil, ensuring that the discharged air or gas is free from oil contaminants. This is particularly critical in industries where oil contamination can have detrimental effects on product quality or equipment performance.
  • 3. Sealing Technology: Oil-free screw compressors employ advanced sealing technologies to prevent air or gas leakage between the high-pressure and low-pressure sides of the compressor. These sealing systems ensure efficient compression while maintaining the required clearances between the rotors and the compressor housing.
  • 4. Cooling Systems: Oil-free screw compressors utilize alternative cooling methods, such as air or water cooling, to dissipate the heat generated during compression. Efficient cooling is crucial to prevent overheating and ensure reliable operation.
  • 5. Filtration Systems: Oil-free compressors often incorporate high-quality filtration systems to remove particulates, moisture, and other contaminants from the incoming air or gas. These filtration systems help maintain the integrity of the compressor and ensure the delivery of clean, oil-free compressed air or gas.
  • 6. Application-Specific Solutions: Oil-free screw compressors are available in various sizes and configurations to meet specific application requirements. They can be tailored to deliver the desired air or gas flow rates, pressures, and purity levels.

It’s important to note that oil-free screw compressors generally have higher initial costs compared to lubricated compressors due to their specialized design and materials. However, they offer benefits such as reduced maintenance, minimized risk of oil contamination, and compliance with stringent industry standards or regulations.

When considering an oil-free screw compressor, it’s crucial to assess the specific application needs, air quality requirements, and operating conditions. Consulting with manufacturers or suppliers can help in selecting the most suitable oil-free screw compressor for a particular industry or process.

In summary, oil-free screw compressors are available and offer a reliable and efficient solution for applications where oil-free compressed air or gas is essential. These compressors are designed with specialized features to ensure dry compression, reliable sealing, effective cooling, and high-quality filtration.

air compressor

What Is the Role of Air Dryers in Screw Compressor Systems?

Air dryers play a crucial role in screw compressor systems by removing moisture from the compressed air. Here’s a detailed explanation:

Air contains moisture in the form of water vapor, which can be problematic when compressed. As air is compressed, its temperature rises, causing the moisture to condense into liquid water. This moisture can cause various issues within the compressed air system, including equipment corrosion, decreased efficiency, and compromised air quality.

The role of air dryers in screw compressor systems is to remove this moisture from the compressed air, ensuring dry and clean air for reliable and efficient operation. Here are the key functions and benefits of air dryers:

1. Moisture Removal:

Air dryers extract moisture from the compressed air, reducing its dew point temperature. By lowering the dew point, the risk of condensation and subsequent issues, such as corrosion and water damage to pneumatic equipment, is minimized. Dry air is essential for maintaining the integrity and longevity of the system components.

2. Protection of Pneumatic Equipment:

Moisture in the compressed air can negatively impact pneumatic equipment, including valves, actuators, and air tools. It can cause rust, corrosion, and malfunctioning of these components. By using air dryers to remove moisture, the risk of damage to the equipment is significantly reduced, extending their lifespan and ensuring reliable performance.

3. Prevention of Contamination:

Moisture in compressed air can also lead to the growth of microorganisms, such as bacteria and fungi, within the system. These contaminants can contaminate the air and pose a health risk or cause product spoilage in sensitive applications, such as food and pharmaceutical industries. Air dryers help prevent the growth of these contaminants, ensuring clean and safe compressed air.

4. Enhanced Efficiency:

Dry compressed air improves the efficiency of the overall system. Moisture in the air can cause pressure drop issues, affecting the performance of pneumatic tools and equipment. Dry air allows for optimal operation, reducing energy consumption and enhancing system efficiency.

5. Reduced Maintenance and Downtime:

Moisture-related issues can lead to increased maintenance requirements and system downtime. By removing moisture with air dryers, the need for frequent maintenance and repairs caused by water-related problems is minimized. This helps in reducing costly downtime and improving productivity.

There are different types of air dryers commonly used in screw compressor systems:

a) Refrigerated Air Dryers: These dryers cool the compressed air, causing moisture to condense and separate from the air stream. The condensed water is then drained from the system, leaving behind dry air.

b) Desiccant Air Dryers: These dryers utilize desiccant materials, such as silica gel or activated alumina, to adsorb moisture from the compressed air. The desiccant material undergoes a regeneration process to remove the accumulated moisture, ensuring continuous drying of the compressed air.

c) Membrane Air Dryers: These dryers use permeable membranes to selectively remove moisture from the compressed air. The membranes allow water vapor to pass through while retaining dry air, effectively drying the compressed air stream.

The selection of the appropriate air dryer depends on factors such as the desired level of moisture removal, the specific application requirements, and the operating conditions of the screw compressor system.

In summary, air dryers play a vital role in screw compressor systems by removing moisture from the compressed air. They protect equipment, prevent contamination, enhance efficiency, and reduce maintenance and downtime. By ensuring dry and clean compressed air, air dryers contribute to the longevity, reliability, and optimal performance of the entire compressed air system.

air compressor

How Do Screw Compressors Compare to Piston Compressors?

Screw compressors and piston compressors are two common types of compressors used for various applications. Here’s a detailed comparison between these two types:

1. Working Principle:

Screw Compressors: Screw compressors use intermeshing rotors (usually a male and female rotor) to compress air or gas. The rotors rotate in opposite directions, creating compression chambers that gradually reduce in volume, compressing the air or gas. Piston Compressors: Piston compressors, also known as reciprocating compressors, use a piston and cylinder arrangement to compress air or gas. The piston moves back and forth within the cylinder, creating compression by reducing the volume of the chamber.

2. Continuous vs. Intermittent Compression:

Screw Compressors: Screw compressors provide continuous compression, which means they can deliver a steady flow of compressed air or gas without pulsations. The compression process is smooth and continuous, resulting in less vibration and noise. Piston Compressors: Piston compressors provide intermittent compression due to the reciprocating motion of the piston. The compression process is characterized by pulsations, resulting in pressure fluctuations and higher vibration levels compared to screw compressors.

3. Efficiency:

Screw Compressors: Screw compressors are known for their relatively high efficiency. They can achieve higher isothermal and adiabatic efficiency compared to piston compressors. The smooth and continuous compression process in screw compressors minimizes energy losses and heat generation, resulting in improved efficiency. Piston Compressors: Piston compressors have lower overall efficiency compared to screw compressors. The reciprocating motion of the piston leads to energy losses due to friction, heat generation, and pressure pulsations. These factors can reduce the efficiency of piston compressors, especially at higher compression ratios.

4. Size and Portability:

Screw Compressors: Screw compressors are generally more compact and require less space compared to piston compressors of similar capacity. They have a simpler design with fewer moving parts, making them relatively lightweight and easier to install. Screw compressors are often mounted on a skid or integrated into compact packages, offering convenient portability. Piston Compressors: Piston compressors are typically larger and bulkier compared to screw compressors of similar capacity. They have more complex designs with multiple moving parts, including pistons, connecting rods, and valves. The larger size and weight of piston compressors make them less portable and require more installation space.

5. Maintenance and Service:

Screw Compressors: Screw compressors generally require less maintenance compared to piston compressors. They have fewer moving parts, reducing the chances of wear and tear. Screw compressors often have longer service intervals and lower maintenance costs. However, proper lubrication and regular inspections are still necessary to ensure optimal performance and efficiency. Piston Compressors: Piston compressors require regular maintenance due to the higher number of moving parts. Components such as pistons, rings, valves, and bearings may require more frequent inspections, lubrication, and replacements. Maintenance costs and service intervals for piston compressors are typically higher compared to screw compressors.

6. Noise and Vibration:

Screw Compressors: Screw compressors operate with lower noise and vibration levels compared to piston compressors. The continuous and smooth compression process in screw compressors results in reduced vibrations and quieter operation, making them suitable for noise-sensitive environments. Piston Compressors: Piston compressors can generate higher noise levels and vibrations due to the reciprocating motion of the piston and the pulsations during compression. Additional measures, such as sound insulation and vibration dampening, may be required to minimize noise and vibration in piston compressors.

Both screw compressors and piston compressors have their advantages and disadvantages depending on specific application requirements. Screw compressors are favored in applications that demand continuous and efficient compression with minimal pulsations and lower noise levels. Piston compressors are suitable for applications that require intermittent compression, lower initial investment, and simplicity. Factors such as desired flow rate, pressure range, operating conditions, and cost considerations play a crucial role in selecting the appropriate compressor type for a given application.

China best Rotary Combined Silent Screw Air Compressor WAC-20A with Air Tank   air compressor lowesChina best Rotary Combined Silent Screw Air Compressor WAC-20A with Air Tank   air compressor lowes
editor by CX 2024-02-26

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