China 355kw Water Lubrication Oil Free Two-Stage Screw Compressor for Industrial

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Product Description

Diffirent kind of screw air compressor can be OEM customized for normal standard oil inject screw air compressor & Oil free water lubricated screw air compressor & Oil Free Scroll air compressor.
Belt driven type Screw Air Compressor Specifications
* Genuine belt to meet the demand of heavy-duty, long life and high reliability.
* Convenient belt tensioning device makes the maintenance easy,and the transmisstion high-efficiency is ensured.
* Provide the flexibility for the customers easily modify the working pressure if a change becomes necessary.
* Low operation cost
* Energy saving

 Technical Parameters for Oil-Free Scroll Air Compressor

Product Name 2.2-5.5kW Portable Oil-Free Scroll Air Compressor with air tank Bitmap

Model KPXW-0.25/8-YD KPXW-0.4/8-YD KPXW-0.6/8-YD
Capacity  L/min 250 400 600
Discharge pressure MPa 0.5~0.8 0.5~0.8 0.5~0.8
Power kW 2.2 3.7 5.5
Speed  r/min 3200 3200 2800
Voltage  V/Hz 380/50 380/50 380/50
Noise  dB (A) 61±3 62±3 63±3
Discharge temperature  ºC ≤Ambient temp+15ºC ≤Ambient temp+15ºC ≤Ambient temp+15ºC
Cooling method Air cooling Air cooling Air cooling
Controll method Automatic control Automatic control Automatic control
Connect interface size Rc1/2 Rc1/2 Rc3/4
Weight  kg 110 120 160
This series of products has obtained ISO 8573-1 Class 0 oil-free certification, with few parts, small volume, light weight, small vibration, low noise, no wearing parts, long service life, recognized as silent and maintenance free products, providing clean compressed air for users. The utility model has the advantages of convenient movement and is suitable for the occasions where the noise requirements are not very strict, and the utility model can directly supply air for use.

Technical Parameters for Oil-Free Scroll Air Compressor air end

Product Name Oil Free Scroll Air End
Model KXW-0.4/10-JT KXW-0.6/10-JT KXW-0.4/10-JT KXW-0.6/10-JT
Capacity    400L/min 600L/min 400L/min 600L/min
Discharge pressure MPa 1 1 1 1
Power   3.7 5.5 3.7 5.5
Speed   3200 2800 3200 2800
Voltage  V/Hz 380/50 380/50 380/50 380/50
Noise  dB (A) 62±3 63±3 62±3 63±3
Discharge temperature  ºC ≤ambient temp+15 ≤ambient temp+15 ≤ambient temp+15 ≤ambient temp+15
Cooling method Whole air cooling Whole air cooling Whole air cooling Whole air cooling
Connect interface size Rc1/2 Rc3/4 Rc1/2 Rc3/4
Weight  kg 21 29 21 29

Technical Parameters for Oil-Free Water Lubricated Screw Compressor

 Oil-Free Water Lubricated Screw Compressor
 Model No. Motor Power (kW) Lubricant Water (L) Air delivery (m3/min) Pressure
Connector dia Sound(dB) Weight(kg) L*W*H(mm)
KPW-7.5F 7.5 12 1.1 7 3/4″ 55 500 1300×800×1300
1 8
0.85 10
0.7 12.5
KPW-11F 11 20 1.8 7 1″ 56 540 1300×800×1300
1.65 8
1.5 10
1.3 12.5
KPW-15F 15 26 2.4 7 1″ 57 650 1600×910×1350
2.2 8
2.1 10
1.8 12.5
KPW-18.5F 18.5 34 3.1 7 1″ 58 840 1600×910×1350
2.9 8
2.7 10
2.3 12.5
KPW-22F 22 41 3.8 7 1″ 58 870 1600×910×1350
3.6 8
3.2 10
2.5 12.5
KPW-30F 30 55 5.3 7 11/4″ 60 980 1950×1050×1432
5 8
4.3 10
3.6 12.5
KPW-37W 37 70 6.6 7 11/4″ 60 1000 1950×1050×1432
6.2 8
5.7 10
4.6 12.5
KPW-45W 45 87 8 7 11/2″ 63 1060 2150×1300×1590
7.7 8
6.9 10
6 12.5
KPW-55W 55 100 10.5 7 2″ 65 1250 2150×1300×1590
9.8 8
8.7 10
7.3 12.5
KPW-75W 75 100 13.6 7 2″ 67 1480 2150×1300×1590
13 8
11.6 10
KPW-90W 90 250 16.2 7 Dn50 71 2030 2550×1400×1605
15.5 8
14 10
KPW-110W 110 270 20.8 7 Dn65 72 2450 2550×1400×1605
19.5 8
16.5 10
KPW-132W 132 320 24 7 Dn65 73 2850 2550×1400×1605
23 8
20 10
KPW-160W 160 360 27.8 7 Dn65 75 3750 3300×2200×2000
26.5 8
23.5 10
KPW-200W 200 430 34.5 7 Dn80 77 4100 3300×2200×2000
33 8
28 10
KPW-250W 250 540 43 7 Dn100 78 4750 3300×2200×2000
40 8
37 10
KPW-280W 280 560 51 7 Dn125 78   4000×2000×2100
50 8
45 10
KPW-315W 315 616 56 7 Dn125 80   4600×2300×2400
55 8
49 10
KPW-355W 355 704 64 7 Dn150 83   4600×2300×2400
62 8
54 10
KPW-400W 400 803 73 7 Dn150 85   5000×2350×2399
70 8
61 10
KPW-450W 450 891 81 7 Dn175 85   5500×2590×2800
79 8
70 10
KPW-500W 500 979 89 7 Dn200 85   5500×2590×2800
87 8
77 10

KP-LB Belt Drive Integrated Type Screw Air Compressor with air tank air dryer 
Power range: 20hp ~ 600hp
Pressure: 7-13 Bar

7bar/8bar/10bar/12.5bar working pressure(discharge pressure) for your selection (for more lower pressure 4bar or 6bar, please send your inquiry )
Intelligent microcomputer control system, controller has the remind & record function, show the compressor operation situation clearly
Superior components, low maintenance cost
Germany OPTI belt, easy for replace, and ensure the product quality
* Oversize air-end, low rpm, no overheat problem
IP54/IP55 high quality motor, CZPT bearing, Class F level insulation; Class BTemperature rise; 
* Discharge temperature= Ambient temperature+15ºC, with cooling/ventilation system tailor made to the same local hot-humid climatic condition, NO OVERHEATING ON CONTINUOUS 100% LOAD IS GUARANTEED!
Top door is locking design, easy to open to clean the cooler and fan 
*Compressor is filled with lubrication oil before delivering, you can operate it after installed and powered on. Once it run 500hours to change the new air filter and oil filter was set for first maintenance, then normally change them with 2000-3000hours for once maintenance replacing new one.
Phase reversal protection, current overload protection, pressure protection, overheat protection


 Technical Parameters of LB-TY Fixed Belt Drive Screw Compressor
Model No. Motor Power (kw) Horse Power
Air delivery(m³/mim)  Working pressure(bar) Air Dryer Model Air Tank
L*W*H(mm) N.W(KG)
LB-4TY 4 5.5 0.74 7 HAD-001-1NF
250L 1400*670*1550 400
0.66 8
0.56 10
LB-5.5TY 5.5 7.5 0.8 7 HAD-001-1NF
250L 1400*670*1550 450
0.7 8
0.6 10
LB-7.5TY 7.5 10 1.2 7 HAD-001NF
250L 1400*670*1550 500
1.1 8
1 10
0.8 13
LB-11TY 11 15 2.0 7 HAD-003NF
300L 1400*670*1550 550
1.6 8
1.42 10
1.14 13
LB-15TY 15 20 2.5 7 HAD-003NF
300L 1150*800*1100 390
2.3 8
2 10
1.75 13
LB-18.5TY 18.5 25 3.1 7 HAD-003NF
250L*2 1650*800*1840 620
2.9 8
2.6 10
2.2 13
LB-22TY 22 30 3.5 7 HAD-003NF
250L*2 1650*800*1840 700
3.3 8
3.0 10
2.6 13
*According to the standard of GB19153-2009     *Compressor Stage: Single Stage Compression
*Standard Power Supply: 380V/50Hz/3ph           *Exhaust Temperature: Ambient Temperature +15ºC
*Configurated normal temperature type Air dryer,with Dew Point range: 3-10ºC;
*Please contact us for any specification that is not within the above mentioned standard.
Welcome to join us !
We Consider Our Customers as Our Friends and Families, and We do Believe in the CZPT Situation for Building up Long-Term Relationship. 
• Innovation
    Provide innovative, stable products and services.
• Quality
    Deliver consistently superior performance and pursue every possible improvement. 
• Agility
    Identify emerging trends and act quickly to acquire new opportunities.
• Customer Satisfaction
    Anticipate customer needs and exceed their expectations.
• Warranty
Within 12 months since the customer used,or 18 months since shipped from factory, no matter which expires, we ensure that no defects for material and manufacturing.

Name   7.5KW Belt Driven Integrated Screw Air Compressor
Model   SLB-7.5-7 SLB-7.5-8 SLB-7.5-10 SLB-7.5-13
Specification Working pressure bar 7bar 8bar 10bar 13bar
Air delivery M³/min 1.15m3/min 1.06m3/min 0.85m3/min 0.65m3/min
Motor power KW 7.5KW
Voltage V 380V/50Hz/3ph
(other voltage need to take 20days customize produciton )
Outlet dia   G3/4
Weight Kg 280
Dimension (L*W*H)mm 1650*800*1700mm  (Integrated compressor+dryer+tank) 
Compressor type Single Stage Screw
Start mode   Delta Start
Cool method   Air cooled
Driven method   belt driven
Discharge temp ºC Ambient temp+10-15ºC
Compressed oil content ppm ≤3PPM
Noise dB(A) 78
Motor Protection grade (IP54) IP54 / Class F insulation/ Class B temperature rise
Max ambient temp ºC ≤40ºC
Control mode  PLC MAM PLC
Lubricant Oil replace regular time H 3000hrs(First runing time only 500hrs)
Oil separator replace regular time H 3000hrs 
Oil Filter replace regular time H 3000hrs(First runing time only 500hrs)
Air filter element replace regular time H 3000hrs(First runing time only 500hrs)
Configured Refrigerated Air Dryer Specification  m3/min 1.2m3/min
Voltage 220V/50Hz/1ph
Configured Air Tank Volume L 300L (GB-150 standard pressure vessel)


KEEPWIN TECHNOLOGY ZheJiang CO.,LTD is a high-tech joint-stock enterprise which specializes in the development and designing, manufacturing and installation, mating remolding, and sales service of compressors as well as the corresponding pre-and post-position purifying equipment. CZPT offers you a various range of gas compressors like normal standard screw compressor, piston compressor, diaphragm compressor, CNG compressor, CO2 compressor, Hydrogen compressor, Nitrogen booster compressor, etc. for your process handling needs. These products are developed with the highest level of professionalism and innovation. The premium-grade raw material and advanced technology is utilized in the production process, which assists us in giving required shape, design, and finish to the finished products. The products are then sent to the Quality Control Department for stringent quality tests on various parameters.
Keepwin Gas Solution Engineer can customize any special gas Reciprocating Piston Compressor & high pure gas flammable gas oil-free Diaphragm Compressor, and Industry using Screw Air Compressor & Portable Piston Air Compressor.
A. The gas compression medium 
B. The flow rate: _____Nm3/hr
C. Inlet pressure: _____ Barg(gauge pressure)
D. Discharge pressure: _____ Barg(gauge pressure)
E. Inlet gas temperature & Outlet gas temperature
F. Cooling water temperature as well as other technical requirement.
G. Voltage/Frequency/Phase
The compressed medium may also include flammable and explosive gas, such as Natural Gas, Coal Gas ,coking gas, oxygen gas, Hydrogen gas, as well as special gas which are toxic gas and corrosive gas, radioactive gas. CZPT has taken a series of technical measures in aspects such as structure material, explosion prevention, auto-control and protection to guarantee safety and reliability.
The products are stable,reliable and have already been in series and modularized.keepwin can aslo rapidly provide products of other specifications through modular combination design upon users’ requirements.

Customer Case




Q1: What’s your delivery time?
A: Generally screw compressor with 20-30 days, Reciprocating compressor & diaphragm high pressure gas comrpessor with 12-20weeks to customize producing.

Q2: How long is your air compressor warranty?
A: Usually 1 year /12 Months for whole compressor machine, 2years/24months for air end (except maintenance spare parts.). And we can provide further warranty if necessary.

Q3: How long could your air compressor be used?
A: Generally, more than 10 years.

Q4: Can you do OEM for us?
A: Yes, of course. We have around 2 decades OEM experience.And also we can do ODM for you.

Q5: What’s payment term?
A: T/T, L/C, D/P, Western Union, Paypal, Credit Card, Trade Assurance and etc. Also we could accept USD, RMB, GBP, Euro and other currency.

Q6: How about your customer service?
A: 24 hours on-line service available. 48hours problem sovled promise.

Q7: How about your after-sales service?
A: 1. Provide customers with intallation and commissioning online instructions.
2. Well-trained engineers available to overseas after-sales service.

Q8. Are you factory?
A4: Absolutely! You have touched the primary sources of Air Gas Compressor. We are factory.

How to contact with us?
Send your Inquiry Details in the Below, or Click “Back to Home” to check more other Gas Compressor machine equipment!  


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 355kw Water Lubrication Oil Free Two-Stage Screw Compressor for Industrial  China 355kw Water Lubrication Oil Free Two-Stage Screw Compressor for Industrial

Gas powered air compressor

As one of the gas powered air compressor manufacturers, suppliers, and exporters of mechanical products, We offer gas powered air compressor and many other products.

Please get in touch with us for details.

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