China supplier 75kw 100HP Oil-Injected Variable Speed VSD Permanent Magnet Compressor 50Hz 60Hz 7 8 10 13 Barg Made by CZPT wholesaler

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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


What to Look For When Buying an Air Compressor

An air compressor is a very useful tool that can help you complete many different types of construction jobs. This handy machine makes many tasks much easier, but not all of them are created equally. Understanding what to look for when buying an air compressor will help you make an informed decision. Here are some of the things you should look for. These include price, size, and energy efficiency. Also, make sure to consider the air compressor’s type.

Single-stage air compressors are quieter

When it comes to noise level, single-stage air compressors are the way to go. These machines have fewer moving parts and are quieter than two-stage models. Single-stage air compressors use an axial flow design and can be quieter than their dual-stage counterparts. Single-stage air compressors can run longer and at lower pressures. Single-stage air compressors can be used for light industrial applications. They have a long life expectancy, with some models lasting for over 3 thousand hours.
While some single-stage air compressors are quieter than two-stage air compressors, both models have noise-reduction features. One type features rubber parts, which are designed to dampen noise. Another feature makes a compressor quieter: its location near the job site. Some models feature rubber base plugs and rubber mats to reduce floor vibrations. In addition to using these features, single-stage compressors are easier to transport.
Noise levels are important when choosing an air compressor. Some machines are too noisy for comfortable work, and some businesses don’t want to expose customers to noise-generating air compressors. Other noise levels can even endanger workers’ health. Single-stage air compressors are more affordable than dual-stage compressors. They are also quieter and more powerful. But be prepared for the noise. Some single-stage air compressors are still noisy.
Compared to their two-stage counterparts, single-stage compressors are quieter when running at full capacity. However, double-stage compressors are quieter on low capacities than single-stage units. Those with variable speed are quietest at lower capacities. The difference is about 10db. If you’re concerned about the noise level, you should consider a two-stage air compressor. But if you have a small workshop, it may not be suitable for you.
One-stage air compressors are generally more efficient than two-stage air compressors. The noise from a two-stage air compressor is lower because there’s no intermediate stage. Single-stage air compressors also use a piston that rotates in a single stage, while dual-stage air compressors, also known as duplex models, are more efficient. A single-stage air compressor is quieter, but double-stage compressors are louder.

Two-stage air compressors are more energy efficient

Two-stage air compressors are more energy-efficient than single-stage machines. The efficiency of two-stage air compressors is increased through a combination of improved efficiency and increased longevity. These machines can store more air and have higher compression ratios. One model of a two-stage compressor can hold approximately 83 cubic feet of air at 100 PSI and 120 cubic feet at 150 PSI. A two-stage compressor is also quieter.
Two-stage air compressors are more energy-efficient because they have 2 pistons instead of one. These air compressors achieve a higher pressure rating and recover more quickly. This type of compressor is perfect for jobs that require high air pressure for a prolonged period of time. In addition, they can operate multiple tools simultaneously. This makes them better for commercial and industrial use. Listed below are some benefits of two-stage air compressors.
Single-stage air compressors can power tools in the garage or kitchen, but they are not as reliable for industrial applications. Single-stage compressors have larger parts that tend to experience condensation. Furthermore, single-stage compressors do not last long in continuous use and are less energy-efficient than two-stage ones. Whether you’re using the compressor for a single tradesperson, a small crew, or a large construction crew, two-stage compressors are the best choice.
Single-stage air compressors are often used in small-scale food preparation and production. Single-stage air compressors are easy to transport between locations, and can be plugged into several electrical outlets. Single-stage compressors are also ideal for high-volume food processing. A dual-stage air compressor is ideal for industrial use. In some cases, you can even move the single-stage air compressor between two-stage air compressors.
Single-stage compressors often cycle too quickly, drawing more electricity than two-stage units. A variable speed unit stays on a low speed for hours at a time. Single-stage air conditioners force you to lower your thermostat settings while single-stage air conditioners run too often. Both units are energy-efficient but they are not as energy-efficient as variable-speed compressors. The main difference is that single-stage air conditioners tend to drain the power source quicker.

Piston-driven air compressors are quieter

A piston-driven air compressor is 1 of the quietest types of air compressors. It is less noisy than reciprocating air compressors. A piston-driven air compressor can reach 62 decibels, while a scroll compressor is around half that volume. The 2 main components of a scroll air compressor are the piston and the helical screw. These air compressors are both very efficient and quiet.
Older compressors are incredibly noisy. They produce a “wumpa” noise similar to a large engine. They are also capable of producing a high-pitched whine. These noises can be deafening, especially in a small workshop. That’s why it’s essential to look for a quiet compressor. But what makes a compressor quiet? Read on to learn more about this essential tool.
Another difference between piston-driven air compressors and electric-driven air compressors is the power source. Electric air compressors produce less noise than gas-powered compressors, which use an engine. Piston-driven air compressors are also more efficient. They also generate less heat, making them an ideal choice for offices and other settings where noise is a problem. The best way to decide between the 2 types of air compressors is to check the manufacturer’s warranty and read the ‘Description’.
Noise reduction is the first priority of a compressor’s owner, so make sure that you have the right model. If you’re working on something sensitive, don’t place the compressor too close to a building where people might be nearby. Noise can be very disruptive to the workspace and can cause health problems. To help combat noise, you’ll need to buy a quiet air compressor. And don’t forget to consider its location: Piston-driven air compressors are quieter than their reciprocating counterparts.
Piston-driven air compressors are quiet because the piston is made of thin metal and more rubber, which absorbs the sound. Unlike reciprocating air compressors, piston-driven air compressors are more efficient than their dual-piston cousins, which are quieter and more powerful. So which type is right for you? Take a look at some of the main differences between the two. If you want a quiet compressor, make sure it meets the specifications required by the job you’re working on.

Oil-lubricated air compressors are more cost-effective

There are several reasons why oil-lubricated air compressors are more expensive than dry-type air compressors. First of all, oil-lubricated air compressors tend to be more reliable and quiet. Additionally, oil-lubricated air compressors require fewer parts and can last longer than dry-type air compressors. These are just a few of the many benefits of using oil-lubricated air compressors.
Oil-free air compressors have some disadvantages. They are less durable and may not be as efficient as oil-lubricated models. Additionally, because oil-lubricated air compressors use oil, they can get very noisy. While they are less expensive, they are not the best option for heavy-duty work. However, modern oil-free air compressors have soundproofing and are suitable for industrial use.
When purchasing an oil-lubricated air compressor, make sure to choose 1 with a tank capacity that meets your needs and your space. Larger tanks can be more expensive than small tanks, but larger units are easier to move around. Also, be sure to consider the weight and size of the portable air compressors when making your choice. If the weight is too large, you may have trouble carrying it from place to place.
Another benefit of using oil-lubricated air compressors is their reduced need for oil. These models can last up to a decade longer than oil-free counterparts. Oil-free air compressors are more affordable and can achieve the same high performance as their oil-lubricated counterparts. Many industrial applications benefit from these air compressors. So, which 1 is right for you? We’ve listed a few of them below.
Another benefit of choosing an oil-lubricated air compressor is the reduced cost of maintenance. This type is more durable than its oil-lubricated counterparts, which require regular oil changes to keep them running smoothly. However, it is not feasible to transport an oil-lubricated compressor, which means that you must install it permanently to keep it working efficiently. In addition, these air compressors are difficult to move and are not portable, which can limit your ability to use it in a pinch.

China supplier 75kw 100HP Oil-Injected Variable Speed VSD Permanent Magnet Compressor 50Hz 60Hz 7 8 10 13 Barg Made by CZPT     wholesaler China supplier 75kw 100HP Oil-Injected Variable Speed VSD Permanent Magnet Compressor 50Hz 60Hz 7 8 10 13 Barg Made by CZPT     wholesaler

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