China Custom 75HP 55kw Variable Speed Driven VSD\VFD Screw Air Compressor manufacturer

Product Description

Variable Speed Driven VSD\VFD Screw Air Compressor Advantages:

DENAIR VSD (Variable Speed Drive) rotary screw air compressors are suitable for customers who need different amount of air supply and extremely accurate pressure. It can facilitate customers to optimize production process and improve productivity.
 
The principle of VSD is to adjust the motor rotation speed automatically according to the actual air demand. The reduced system pressure decreases the total energy consumption of the whole system, which can reduce energy costs by 35% or more.
 
The VSD air compressor reduces the energy consumption through the following points:

1. Removing the low efficiency transformation process from the full loading to unloading
2. Avoiding the power during the unloading process
3. Keeping the pipeline pressure drop under 0.1bar
4. Reducing the average working pressure
5. Lowering the system pressure to reduce the system leakage
6. The soft starting method increases the current balance and avoids the current surge
7. A flexible choice from 4 to 13bar which reduces the power consumption most.

Technical Parameters Of Variable Speed Driven VSD\VFD Screw Air Compressor:
 

Model Maximum
 working pressure
Capacity
 FAD
Installed 
motor power
Driving
 Mode&
Cooling 
Method
Dimensions
(mm)
Weight
(kg)
Noise
 level
[dB(A)]
Air outlet
 pipe
diameter
bar(e) psig m3/min cfm kW hp L W H
DVA-18G 7.5 109 1.46-2.91 51.6-102.8 18.5 25 Belt 
Direct
/Direct 
Driven
Air
 Cooling
1000 900 1150 500 65±2 G1″
8.5 123 1.45-2.89 51.2-102 18.5 25 1000 900 1150 500 65±2 G1″
10.5 152 1.44-2.87 50.8-101.3 18.5 25 1000 900 1150 500 65±2 G1″
13 189 1.08-2.16 38.1-76.3 18.5 25 1000 900 1150 500 65±2 G1″
DVA-22G 7.5 109 1.89-3.78 66.7-133.5 22 30 1050 1200 1300 550 65±2 G1 1/4″
8.5 123 1.87-3.73 66-131.7 22 30 1050 1200 1300 550 65±2 G1 1/4″
10.5 152 1.55-3.09 54.7-109.1 22 30 1050 1200 1300 550 65±2 G1 1/4″
13 189 1.38-2.76 48.7-97.5 22 30 1050 1200 1300 550 65±2 G1 1/4″
DVA-30G 7.5 109 2.3-4.59 81.2-162.1 30 40 1050 1200 1300 600 65±2 G1 1/4″
8.5 123 2.25-4.5 79.4-158.9 30 40 1050 1200 1300 600 65±2 G1 1/4″
10.5 152 2.16-4.32 76.3-152.5 30 40 1050 1200 1300 600 65±2 G1 1/4″
13 189 1.89-3.78 66.7-133.5 30 40 1050 1200 1300 600 65±2 G1 1/4″
DVA-37G 7.5 109 3.56-7.11 125.7-251.1 37 50 1050 1200 1300 650 65±2 G1 1/4″
8.5 123 3.35-6.7 118.3-236.6 37 50 1050 1200 1300 650 65±2 G1 1/4″
10.5 152 2.76-5.51 97.5-194.6 37 50 1050 1200 1300 650 65±2 G1 1/4″
13 189 2.22-4.43 78.4-156.4 37 50 1050 1200 1300 650 65±2 G1 1/4″
DVA-45G 7.5 109 4-7.99 141.2-282.1 45 60 1200 1350 1500 800 68±3 G1 1/2″
8.5 123 3.99-7.97 140.9-281.4 45 60 1200 1350 1500 800 68±3 G1 1/2″
10.5 152 3.97-7.93 140.2-280 45 60 1200 1350 1500 800 68±3 G1 1/2″
13 189 2.76-5.51 97.5-194.6 45 60 1200 1350 1500 800 68±3 G1 1/2″
DVA-55G 7.5 109 5.13-10.26 181.1-362.3 55 75 1200 1350 1500 850 68±3 G1 1/2″
8.5 123 5.08-10.15 179.4-358.4 55 75 1200 1350 1500 850 68±3 G1 1/2″
10.5 152 4.54-9.07 160.3-320.3 55 75 1200 1350 1500 850 68±3 G1 1/2″
13 189 3.78-7.56 133.5-266.9 55 75 1200 1350 1500 850 68±3 G1 1/2″
DVA-75G 7.5 109 7.68-15.36 271.2-542.4 75 100 1500 1450 1600 1000 72±3 G2″
8.5 123 7.65-15.29 270.1-539.9 75 100 1500 1450 1600 1000 72±3 G2″
10.5 152 6-11.99 211.9-423.4 75 100 1500 1450 1600 1000 72±3 G2″
13 189 5.81-11.62 205.2-410.3 75 100 1500 1450 1600 1000 72±3 G2″
DVA-90 7.5 109 7.68-15.36 271.2-542.4 90 120 Direct 
Driven 
Air 
Cooling 
2150 1300 1550 1900 72±3 DN50
8.5 123 7.65-15.29 270.1-539.9 90 120 2150 1300 1550 1900 72±3 DN50
10.5 152 7.02-14.04 247.9-495.8 90 120 2150 1300 1550 1900 72±3 DN50
13 189 5.83-11.66 205.9-411.7 90 120 2150 1300 1550 1900 72±3 DN50
DVA-110 7.5 109 10.35-20.69 365.5-730.6 110 150 2450 1600 1700 2500 75±3 DN80
8.5 123 10.3-20.6 363.7-727.4 110 150 2450 1600 1700 2500 75±3 DN80
10.5 152 8.26-16.52 291.7-583.3 110 150 2450 1600 1700 2500 75±3 DN80
13 189 7.02-14.04 247.9-495.8 110 150 2450 1600 1700 2500 75±3 DN80
DVA-132 7.5 109 12.42-24.84 438.6-877.1 132 175 2450 1600 1700 2700 75±3 DN80
8.5 123 12.37-24.74 436.8-873.6 132 175 2450 1600 1700 2700 75±3 DN80
10.5 152 10.21-20.41 360.5-720.7 132 175 2450 1600 1700 2700 75±3 DN80
13 189 7.56-15.12 266.9-533.9 132 175 2450 1600 1700 2700 75±3 DN80
DVA-160 7.5 109 14.33-28.66 506-1012 160 215 2650 1600 1800 3600 78±3 DN80
8.5 123 14.27-28.53 503.9-1007.4 160 215 2650 1600 1800 3600 78±3 DN80
10.5 152 12.26-24.53 432.9-866.2 160 215 2650 1600 1800 3600 78±3 DN80
13 189 10.15-20.3 358.4-716.8 160 215 2650 1600 1800 3600 78±3 DN80
DVA-185 
DVA185W
7.5 109 15.72-31.44 555.1-1110.1 185 250 Direct 
Driven 
Air 
Cooling 
or 
Water 
Cooling
2800 1500 1800 3700 78±3 DN80
8.5 123 15.63-31.27 551.9-1104.1 185 250 2800 1500 1800 3700 78±3 DN80
10.5 152 14.11-28.22 498.2-996.4 185 250 2800 1500 1800 3700 78±3 DN80
13 189 12.06-24.13 425.8-852 185 250 2800 1500 1800 3700 78±3 DN80
DVA-200
 DVA-200W
7.5 109 17.8-35.6 628.5-1257 200 270 2800 1950 2000 3850 82±3 DN100
8.5 123 17.71-35.42 625.3-1250.7 200 270 2800 1950 2000 3850 82±3 DN100
10.5 152 15.53-31.05 548.4-1096.4 200 270 2800 1950 2000 3850 82±3 DN100
13 189 12.06-24.13 425.8-852 200 270 2800 1950 2000 3850 82±3 DN100
DVA-220
 DVA-220W
7.5 109 19.12-38.23 675.1-1349.9 220 300 2800 1950 2000 4450 82±3 DN100
8.5 123 19.06-38.12 673-1346 220 300 2800 1950 2000 4450 82±3 DN100
10.5 152 15.5-31 547.3-1094.6 220 300 2800 1950 2000 4450 82±3 DN100
13 189 13.87-27.75 489.7-979.9 220 300 2800 1950 2000 4450 82±3 DN100
DVA-250
 DVA-250W
7.5 109 23.52-47.04 830.5-1661 250 350 2800 1950 2000 5150 82±3 DN100
8.5 123 23.49-46.98 829.4-1658.9 250 350 2800 1950 2000 5150 82±3 DN100
10.5 152 19.01-38.03 671.2-1342.8 250 350 2800 1950 2000 5150 82±3 DN100
13 189 17.55-35.1 619.7-1239.4 250 350 2800 1950 2000 5150 82±3 DN100

DENAIR Certifications:

DENAIR Factory:

ZheJiang Denair(group)CO,.Ltd. is a Sino-German joint venture enterprise group integrating R&D,manufacturing and marketing.The company brought in advanced compressor R&D and manufacturing and marketing.The company brought in advanced compressor R&D and manufacturing technology of Germany CHINAMFG Group to make product development and large-scale production,including piston air compressors,double screw air compressors,Portable Air compressor,High and Medium Pressure Air Compressors, oil free air compressor and compressed air treatment equipment.

DENAIR Exhibitions:

DENAIR Global Customers:

 

DENAIR Variable Frequency Air Compressor Packaging: 

FAQ:

Q1: Are you factory or trade company?  
A1: We are factory.

Q2: What the exactly address of your factory? 
A2: No. 366, YangzhuangBang Street, Pingxing Rd., Xindai Town,HangZhou, ZHangZhoug Province, China

Q3: Warranty terms of your machine? 
A3: One year warranty for the machine and technical support according to your needs.

Q4: Will you provide some spare parts of the machines? 
A4: Yes, of course.

Q5: How long will you take to arrange production? 
A5: 380V 50HZ we can delivery the goods within 10 days. Other electricity or other color we will delivery within 22 days

Q6: Can you accept OEM orders? 
A6: Yes, with professional design team, OEM orders are highly welcome.

Lubrication Style: Lubricated
Cooling System: Air Cooling
Cylinder Position: Vertical
Customization:
Available

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Currency: US$
Return&refunds: You can apply for a refund up to 30 days after receipt of the products.

air compressor

How Do You Select the Right Size Screw Compressor for Your Needs?

Choosing the right size screw compressor is crucial to ensure optimal performance, energy efficiency, and cost-effectiveness for your specific compressed air or gas requirements. Here’s a detailed explanation of the selection process:

Selecting the right size screw compressor involves considering several key factors:

  • 1. Air or Gas Demand: Determine your compressed air or gas demand by assessing the total required flow rate (measured in cubic feet per minute or liters per second) and the operating pressure (measured in pounds per square inch or bar). This information helps establish the compressor’s capacity requirements.
  • 2. Duty Cycle: Evaluate your operation’s duty cycle, which refers to the percentage of time the compressor will be running. Duty cycles can vary from continuous operation to intermittent or seasonal usage. The duty cycle affects the compressor’s sizing, as it determines the required compressor output and influences the compressor’s cooling and maintenance needs.
  • 3. Ambient Conditions: Consider the environmental conditions in which the compressor will operate. Factors such as temperature, humidity, and altitude can impact the compressor’s performance and cooling requirements. Ensure that the selected compressor is suitable for the specific ambient conditions of your facility.
  • 4. System Pressure Requirements: Determine the minimum and maximum operating pressure requirements for your application. This information is essential in selecting a compressor that can consistently deliver the required pressure range throughout its operating range.
  • 5. Efficiency Considerations: Evaluate the energy efficiency of different compressor models. Look for compressors with high energy efficiency ratings, such as those certified by organizations like the Air Compressor and Gas Association (CAGI) or ENERGY STAR. Energy-efficient compressors can significantly reduce operating costs over the equipment’s lifespan.
  • 6. Future Expansion: Consider any anticipated growth or changes in your compressed air or gas demand. If you expect increased demand in the future, it’s advisable to select a compressor with some extra capacity to accommodate future expansion without requiring immediate replacement.
  • 7. Maintenance and Serviceability: Assess the maintenance requirements and serviceability of different compressor models. Look for features that make routine maintenance tasks, such as filter changes or oil checks, easily accessible and convenient. Consider the availability of service technicians and spare parts for the chosen compressor brand or model.
  • 8. Manufacturer and Supplier Support: Research the reputation and track record of compressor manufacturers and suppliers. Choose established brands known for producing reliable, high-quality equipment. Consider factors such as warranty coverage, technical support availability, and the proximity of service centers.

Once you have gathered the necessary information and considered the factors mentioned above, you can consult with compressor manufacturers or suppliers who can provide expert advice and assist in selecting the right size screw compressor for your specific needs. They can perform detailed calculations, taking into account the factors discussed, to recommend a compressor that matches your requirements and provides optimal performance.

It’s important to note that selecting the right size screw compressor is a critical decision, and professional guidance is highly recommended to ensure an accurate assessment and proper matching of the compressor to your specific needs.

In summary, selecting the right size screw compressor involves assessing your compressed air or gas demand, duty cycle, ambient conditions, pressure requirements, efficiency considerations, future expansion plans, maintenance requirements, and manufacturer support. By considering these factors and seeking expert advice, you can choose a screw compressor that meets your needs and delivers reliable, efficient performance.

air compressor

Can Screw Compressors Be Used for Refrigeration?

Yes, screw compressors can be used for refrigeration applications. Here’s a detailed explanation:

Screw compressors are versatile and widely used in various industrial applications, including refrigeration. They are known for their efficiency, reliability, and ability to handle high-capacity refrigeration systems. Screw compressors work by compressing refrigerant gas, increasing its pressure and temperature, and then transferring the heat to the surrounding environment.

Here are some key points regarding the use of screw compressors in refrigeration:

1. Industrial Refrigeration Systems:

Screw compressors are commonly employed in large-scale industrial refrigeration systems, such as those used in cold storage facilities, food processing plants, beverage production, and HVAC systems for commercial buildings. These systems require high cooling capacities and continuous operation, making screw compressors an ideal choice.

2. Positive Displacement Compressors:

Screw compressors belong to the category of positive displacement compressors. They use two interlocking helical rotors (screws) to trap and compress the refrigerant gas. This design ensures a continuous flow of refrigerant and allows for efficient compression over a wide range of operating conditions.

3. Oil-Injected and Oil-Free Types:

Screw compressors can be either oil-injected or oil-free. Oil-injected screw compressors use oil for lubrication and cooling, which helps reduce friction and extend the compressor’s lifespan. In contrast, oil-free screw compressors use specialized coatings and materials to eliminate the need for oil, making them suitable for applications where oil contamination is a concern, such as in the pharmaceutical or food industries.

4. Multi-Stage Compression:

In refrigeration applications, screw compressors are often used in multi-stage configurations to achieve higher pressure ratios and improve overall system efficiency. Multi-stage compression involves compressing the refrigerant gas in multiple stages, typically with intermediate cooling between each stage, to reduce the work required for compression and enhance system performance.

5. Variable Speed Control:

Screw compressors can be equipped with variable speed drives (VSD) that allow for precise control of the compressor’s rotational speed. VSD technology enables the compressor to adjust its capacity according to the refrigeration load, resulting in energy savings and improved system performance.

6. System Integration:

Screw compressors are often integrated into complex refrigeration systems, working in tandem with other components such as condensers, evaporators, expansion valves, and control systems. This integration ensures efficient heat transfer, proper refrigerant flow, and effective temperature control.

It’s important to note that the selection of a screw compressor for refrigeration applications should consider factors such as cooling capacity requirements, operating conditions, refrigerant type, system configuration, and specific industry regulations.

In summary, screw compressors are well-suited for refrigeration applications, especially in industrial settings. Their efficiency, reliability, and capacity make them a popular choice for large-scale refrigeration systems. Whether in cold storage facilities, food processing plants, or HVAC systems, screw compressors play a crucial role in maintaining optimal temperatures and preserving perishable goods.

air compressor

What Are the Key Components of a Screw Compressor?

A screw compressor consists of several key components that work together to compress air or gas. Here’s a detailed explanation of these components:

1. Male and Female Rotors:

The male and female rotors are the primary components of a screw compressor. These helical rotors have specially designed profiles that interlock with each other. The male rotor typically has fewer lobes or threads compared to the female rotor. As the rotors rotate, the interlocking lobes create compression chambers that gradually reduce in volume, compressing the air or gas.

2. Compression Chamber:

The compression chamber is formed by the interlocking lobes of the rotors. It is the space where the air or gas is compressed as the rotors rotate. The volume of the compression chamber decreases as the lobes move towards the discharge end, resulting in the compression of the trapped air or gas.

3. Inlet and Outlet Ports:

The inlet port is the entry point through which the air or gas enters the screw compressor. It is typically located at the suction side of the compressor. The inlet port allows the air or gas to flow into the compression chamber during the suction process. The outlet port is the exit point through which the compressed air or gas is discharged from the compressor.

4. Drive System:

The drive system of a screw compressor consists of a motor and a drive mechanism. The motor provides the rotational power required to drive the rotors. Common types of drive mechanisms include direct drive, belt drive, and gear drive. The drive system ensures that the rotors rotate in opposite directions at the desired speed and synchronization.

5. Oil System (in oil-injected compressors):

In oil-injected screw compressors, an oil system is present to provide lubrication, cooling, and sealing between the rotors. The oil system typically includes an oil reservoir, an oil pump, oil filters, and oil coolers. The lubricating oil is injected into the compression chamber, where it forms a thin film on the rotors, reducing friction and minimizing wear.

6. Cooling System:

Screw compressors often incorporate a cooling system to maintain optimal operating temperatures. The cooling system may include air or water-cooled heat exchangers, which dissipate the heat generated during compression. Cooling ensures that the compressor operates within safe temperature limits, preventing overheating and prolonging the lifespan of the components.

7. Control System:

A control system is an essential component of a screw compressor, providing monitoring and regulation of various parameters. It may include sensors, controllers, and safety devices to measure and control variables such as pressure, temperature, and operating conditions. The control system ensures efficient and safe operation of the screw compressor.

8. Sound Attenuation and Vibration Isolation:

To reduce noise and vibration, screw compressors are often equipped with sound attenuation measures and vibration isolation systems. These components help in minimizing the noise and vibrations generated during operation, making the compressor suitable for noise-sensitive environments.

In summary, the key components of a screw compressor include the male and female rotors, compression chamber, inlet and outlet ports, drive system, oil system (in oil-injected compressors), cooling system, control system, and sound attenuation/vibration isolation components. These components work together to enable the efficient compression of air or gas in the screw compressor.

China Custom 75HP 55kw Variable Speed Driven VSD\VFD Screw Air Compressor   manufacturer China Custom 75HP 55kw Variable Speed Driven VSD\VFD Screw Air Compressor   manufacturer
editor by CX 2023-10-23

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