China high quality 18.5kw 25HP Oil-Injected Variable Speed VSD Permanent Magnet Two Stage Compressor 50Hz 60Hz 7 8 10 13 Barg Made by CZPT near me factory

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Product Description


Crownwell Oil-Injected Rotary Screw Compressors

 CWD 7-400 & CWD 7-400 PM
Power output: 7-400 kW / 10-500 hp
Delivery rate: 0.8-71.2 m3/min / 28-2514 cfm
Pressure range: 7-13 bar / 100-190 psig



For 3 generations, customers from mechanical engineering, industry and trade have relied on CZPT know-how when it comes to plHangZhou, developing and manufacturing compressed air systems. They are fully aware of the fact that CZPT AIR is more than just ordinary compressed air: utmost safety, outstanding efficiency, excellent quality, maximized flexibility along with dependable service are the ingredients to transform CZPT AIR into air to work with – in China, in Asia and in more than 102 countries around the world.

The III generation, the basis for economical compressed air production

The Know-How
More than decades of know-how in manufacturing for the compressed air market. World wide knowledge in different compressed air applications have guided the development of customer specified stationary screw compressors.

Technical Advancement for your Benefit
The advantage of CZPT lies in its simplified construction. Fewer components are utilized. This means a 60% reduction in main and wearing parts and over 70% fewer pipes and connections. In turn, this greatly reduces the risk of leakages, making the system environmentally friendly. Safe direct drive operation without V-belt transmission.

The CZPT Screw Compressor works in the following way:
Ambient air is drawn through the intake filter and the multifunctional control system into the screw compressor block. This block consists of a pair of screw rotors. The main rotor, driven by an electric motor, takes the secondary rotor with it. The air is drawn in by the rotation of both of the interlocking rotors and is continually compressed. During rotation, coolant is injected into the rotors and forms a hydrostatic film between the main and secondary rotors. The function of the coolant is to seal the rotors, lubricate the bearings and adsorb the compression heat. Before compressed air leaves the compressor ( at 80 ºC approx.) it is separated from the coolant before being cooled in the aftercooler to approx.. 8ºC to 12ºC above the ambient temperature. The coolant then passes to the thermostatic control block and filter, before entering the cooler where it is cooled from approx.. 80ºC down to 50ºC. It is then injected back into the screw compressor block.

Direct drive via flexible coupling.
Fully encapsulated CZPT screw compressor block.
Standard electric motor Protection Index IP23 and IP54.
User friendly service access.
Top quality, washable, oil resistant sound insulation.
Ready for operation, prewired and fully enclosed.
With operating mode selector switch Automatic-Off-Continuous.
Centrally mounted cooling fan provided for compressed air and lubricant coolers.
Compact and neat cabinet design.

Optional Equipment:
Sense of rotation
Multiple unit control with automatic base load selection
Full motor protection
Mains isolator switch for wall mounting

Beyond these features we offer a wide choice of compressed air accessories in reference to our compressor product range.
Energy Recovery Systems CROWNWELL-THERM
Compressed Air Filters
Compressed Air Dryers
Condensate Traps
Oil-Water Separators
Compressed Air Receivers



(7.5-400kW / 10-500hp)

Model Motor Power
kW / hp
Free Air Delivery
Noise Level
L * W * H
7barg 8barg 10barg   13barg
CWD7 PM 7.5 / 10 1.3 1.2 1.0   0.8 66 760*700*920 200
CWD11 PM 11 / 15 1.7 1.6 1.4   1.2 68 980*750*1000 350
CWD15 PM 15 / 20 2.5 2.3 2.1   1.9 68 980*750*1000 360
CWD18 PM 18.5 / 25 3.2 3.0 2.7   2.4 68 1120*850*1160 500
CWD22 PM 22 / 30 3.8   3.6 3.2 2.8 68 1120*850*1160 520
CWD30 PM 30 / 40 5.3 5.0 4.5   4.0 68 1120*850*1160 550
CWD37 PM 37 / 50 6.8 6.2 5.6   5.0 68 1280*1000*1290 750
CWD45 PM 45 / 60 8.0 7.3 7.0   5.9 72 1280*1000*1290 780
CWD55 PM 55 / 75 10.1 9.5 8.7   7.8 72 1800*1230*1570 1600
CWD75 PM 75 / 100 13.6 12.8 12.3   10.2 72 1800*1230*1570 1800
CWD90 PM 90 / 125 16.2 15.5 14.0   12.5 72 1800*1230*1570 1900
CWD110 PM 110 / 150 21.2 19.8 17.8   15.5 72 2400*1470*1840 2500
CWD132 PM 132 / 180 24.5 23.2 20.5   17.8 75 2400*1470*1840 2700
CWD160 PM 160 / 215 28.8 27.8 25.0   22.4 75 2400*1470*1840 3000
CWD185 PM 185 / 250 32.5 31.2 28.0   25.8 75 3150*1980*2150 3500
CWD200 PM 200 / 270 36.0 34.3 30.5   28.0 82 3150*1980*2150 4000
CWD250 PM 250 / 350 43.0 41.5 38.2   34.9 82 3150*1980*2150 4500
CWD315 PM 315 / 400 51.0 50.2 44.5   39.5 82 3150*1980*2150 6000
CWD355 PM 355 / 450 64.0 61.0 56.5   49.0 84 3150*1980*2150 6500
CWD400 PM 400 / 500 71.2 68.1 62.8   52.2 84 3150*1980*2150 7200
  • Unit performance measured according to ISO 1217, Annex C, Edition 4 (2009)

Reference conditions:
-Relative humidity 0%
-Absolute inlet pressure: 1 bar (a) (14.5 psi)
-Intake air temperature:  20°C, 68°F

  • Noise level measured according to ISO 2151:2004, operation at max. operating pressure and max. speed; tolerance: ±3 dB(A)
  • PM-Permanent Magnet


(7.5-400kW / 10-500hp)

Model Motor Power
kW / hp
Free Air Delivery
Noise Level
L * W * H
7barg 8barg 10barg 13barg
CWD15II-PM 15 / 20 3.0 2.9 2.4 2.2 68 1480*850*1180 780
CWD18II-PM 18.5 / 25 3.6 3.5 2.9 2.5 68 1480*850*1180 800
CWD22II-PM 22 / 30 4.2 4.1 3.5 3.2 68 1480*850*1180 820
CWD30II-PM 30 / 40 6.5 6.4 4.9 4.2 68 1720*1110*1480 1080
CWD37II-PM 37 / 50 7.2 7.1 6.3 5.4 68 1720*1110*1480 1100
CWD45II-PM 45 / 60 9.8 9.7 7.8 6.5 72 1720*1110*1480 1120
CWD55II-PM 55 / 75 12.8 12.5 9.6 8.6 72 2100*1350*1720 2080
CWD75II-PM 75 / 100 17.5 16.5 12.5 11.2 72 2100*1350*1720 2100
CWD90II-PM 90 / 125 20.8 19.8 16.9 14.3 72 2460*1700*1900 3280
CWD110II-PM 110 / 150 24.5 23.5 19.7 17.6 72 2460*1700*1900 3480
CWD132II-PM 132 / 180 30.0 28.0 23.5 19.8 75 2900*1800*2571 3980
CWD160II-PM 160 / 215 34.5 33.6 30.0 23.8 75 2900*1800*2571 4280
CWD185II-PM 185 / 250 41.0 38.4 32.5 28.6 75 3800*1980*2150 5450
CWD200II-PM 200 / 270 44.6 43.0 38.5 32.8 82 3800*1980*2150 5600
CWD220II-PM 220 / 300 48.6 47.0 41.0 38.0 82 3800*1980*2150 6500
CWD250II-PM 250 / 350 55.0 54.0 46.0 40.0 82 3800*1980*2150 6600
  • Unit performance measured according to ISO 1217, Annex C, Edition 4 (2009)

Reference conditions:
-Relative humidity 0%
-Absolute inlet pressure: 1 bar (a) (14.5 psi)
-Intake air temperature:  20°C, 68°F

  • Noise level measured according to ISO 2151:2004, operation at max. operating pressure and max. speed; tolerance: ±3 dB(A)
  • II-Two Stage, PM-Permanent Magnet


Types of Air Compressors

There are many types of Air Compressors available on the market. Learn which 1 is right for your needs and what makes 1 better than another. Find out more about Single-stage models, Oil-free models, and Low-noise models. This article will explain these types and help you decide which 1 you need. You can also learn about Air Compressors that have single-stage compressors. If you are looking for a high-quality compressor, this article will help you choose a unit.

Air Compressors

Air compressors work by forcing atmospheric air through an inlet valve. As the piston moves down, it pulls atmospheric air into the chamber. As the piston rises, it forces the compressed air out of the cylinder through an exhaust valve. One of the most common types of air compressor is the reciprocating type. Another type of compressor is a single-stage piston. These types of compressors compress air in 1 stroke – equivalent to the complete rotation of the piston’s crankshaft.
These devices change electrical or mechanical energy into pressurized air. When air is compressed, its volume decreases, increasing its pressure. Air compressors typically have a minimum pressure of 30 bars. The lower pressure band is the range of air pressure. Most compressors are controlled separately, but network controls can be used to interconnect multiple compressors. This type of controller will not work for all types of compressors. There are other types of air compressors that can communicate with each other.
Compressed air has multiple applications in all kinds of industries. In agriculture, it can power pneumatically powered material handling machines for irrigation and crop spraying. Dairy equipments also use compressed air. Compressors are also used in the pharmaceutical industry for mixing tanks, packaging, and conveyor systems. Portable air compressors, which can be powered by diesel fuel, are frequently used at remote drilling sites. Portable air compressors are also commonly used in oil and gas. They can be used to remotely control valves and install reactor rods.
Whether you use an air compressor for agricultural purposes or in a manufacturing setting, there are some features to consider when choosing an air compressor for your needs. A good compressor will have a safety device. It will automatically shut off the input air and output air once sufficient compressing has been achieved. These features will help your air compressor remain efficient and protect your equipment. The safety device is an important feature of any air compressor to increase its overall efficiency.
Vane air compressors are the most common type. They are generally smaller and less powerful than reciprocating piston compressors, so you can use 1 of these for applications that are under 100 horsepower. The vane air compressors have low compression ratios and high capacities, but they are generally limited to low-power applications. Vane compressors tend to run hot, and they typically have a low compression ratio. It is important to choose the correct oil viscosity for your compressor.

Single-stage models

When comparing single-stage air compressors, look for the term “stages.” Multi-stage compressors use 2 stages and can handle more capacity and pressure. One stage involves pressurizing air using a piston and a lower-pressure cylinder. This compressed air is then moved to a storage tank. Single-stage models tend to be more energy-efficient than their two-stage counterparts. But if you don’t need a high-pressure cylinder, a single-stage air compressor can be the best choice.
Although single-stage air compressors produce less power, they can produce enough air to power pneumatic tools and other pneumatic equipment. These single-stage units are most useful for smaller-scale home projects and DIY projects. For more industrial purposes, a dual-stage model is the best choice. But if you’re in a hurry, a single-stage unit may be sufficient. Ultimately, it depends on what you plan to do with the air compressor.
Single-stage air compressors feature a single cylinder, 1 piston stroke for each revolution of pressurized air. Single-stage compressors are typically smaller and more compact, making them a good choice for smaller work environments. Their cfm capacity (cubic feet per minute) is an important indicator of operating capacity. If you plan to use multiple pneumatic tools, you will probably need a higher cfm model. Similarly, the horsepower of single-stage compressors indicates its working capacity. One horsepower moves 550 pounds per foot per minute.
Multi-stage air compressors are generally more expensive and more energy-efficient than single-stage units, but they can offer higher air flow rates. While they may be more complex, they can lower general operating expenses. If you plan on using your air compressor for industrial or commercial use, a dual-stage model might be the best choice. However, if you’re planning to use the air compressor for mass production, a single-stage model may be the best choice.
Single-stage air compressors have the same piston size and number of inlets, while dual-stage models have a smaller first piston and a much longer second piston. Both have a cooling tube in between the 2 pistons to reduce the air temperature before the second round of compression. The single-stage model is typically small and portable, while the double-stage air compressor is stationary. These compressors can both be stationary and large.

Low-noise models

Despite its name, low-noise models of air compressors are not all the same. The noise level of a compressor can be affected by several factors, including the power source and proximity to the machine. Reciprocal compressors are generally louder than electric ones because of their many moving parts. By contrast, rotary-screw and scroll compressors have fewer moving parts and are quieter.
The noise level of a gas-powered air compressor can be extremely high, making it unsuitable for use indoors. To combat this problem, you can choose an electric model. The noise level of a compressor is primarily caused by motor friction. The cover of a piston is also a major factor in noise, as pistons with minimal covers will produce a lot of noise. Previously, oil was required for a quiet compressor. However, this has changed thanks to the medical industry’s demand for oil-free models.
The CZPT EC28M Quiet Air Compressor is another model that features quiet operation. This air compressor makes 59dB of noise. This level is low enough to allow you to carry on normal conversations while it cycles. In addition, this compressor has an industrial oil-free pump and a 2.8 Amp direct-drive induction motor. These 2 features make it a great choice for businesses.
Low-noise models of air compressors are available for the construction industry. However, these compressors are not necessarily low-quality, which is why you should consider the noise level of your air tool before purchasing one. The specialists at CZPT can recommend the low-noise models for your particular application and space. Noise can distract people who work near the air compressor. That is why many businesses now opt for these models.

Oil-free models

A number of oil-free models of air compressors are available, but what makes them special? Oil-free compressors don’t contain oil, so they’re lubricated by grease instead. They’re a good choice if you’re working with a small compressor and don’t want to risk damaging it. On the other hand, oil-free models do generate significant amounts of heat, which can damage the compressor. Higher pressure can grind the compressor against itself, or even warp it.
A few words of knowledge can help you choose the best oil-free air compressor for your needs. For example, a compressor’s horsepower is a measurement of how powerful the motor is. Higher horsepower means a higher PSI or ACFM. You can also use the ACFM to compare the two. Scroll technology is a modern air compression system that uses a stationary and mobile spiral. This reduces the volume of air in the compressor by directing it to the center.
Purchasing an oil-free air compressor doesn’t have to be a daunting task, though. A good distributor can advise you on what type of oil-free air compressor is right for you. This way, you can save money and enjoy peace of mind while using your air compressor. And, of course, the best way to get a great deal on an air compressor is to speak to a distributor who is knowledgeable about the products available.
An oil-free air compressor is a great option for businesses that are sensitive to the contamination of air. For example, in the pharmaceutical and food industry, a minuscule oil could spoil a product or even damage production equipment. Oil-free air compressors generally have lower maintenance costs than oil-flooded models because there are fewer moving parts. Because of this, oilless air compressors require fewer maintenance and may still need to be replaced occasionally.
A few advantages of an oil-free air compressor over an oil-lubricated 1 include lower noise levels. Oil-free air compressors tend to be less noisy and run more quietly than oil-injected ones, but you should still carefully weigh the pros and cons before making a decision. Also, consider how much you use your air compressor before choosing a model. The pros outweigh the cons. In the end, you’ll be glad you chose an oil-free air compressor.

China high quality 18.5kw 25HP Oil-Injected Variable Speed VSD Permanent Magnet Two Stage Compressor 50Hz 60Hz 7 8 10 13 Barg Made by CZPT     near me factory China high quality 18.5kw 25HP Oil-Injected Variable Speed VSD Permanent Magnet Two Stage Compressor 50Hz 60Hz 7 8 10 13 Barg Made by CZPT     near me factory

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