Product Description

Product Description

Product features of low pressure screw air compressor:

1. Adopt large rotor and low speed to ensure the high performance of the machine;
2. Increase oil and gas separation equipment to ensure that the export oil content is ≤3ppm;
3. The air source of the low-pressure screw air compressor is clean, which reduces the number of cleaning nozzles of texturing machines and other equipment, and improves the quality of the finished product;
4. The heat dissipation area of the oil cooler is increased by more than 30% to ensure normal operation in summer without over-temperature;
5. Independently design the internal pressure ratio of the host to ensure a better specific power;
6. Intelligent control system, automatically adjust the exhaust volume according to the customer’s usage (frequency conversion model).
7. For the texturing industry, ensure long-term continuous operation, set fault warnings, and do not stop immediately, so that customers are fully prepared for shutdown;
8.  Adopting dual air outlet design, the air outlet temperature can be adjusted according to climate changes, meeting customer needs to a greater extent, and achieving high efficiency and energy saving at the same time.

1. Efficient airend
There is no intermediate transmission, so there is no energy loss; direct drive increases reliability and reduces maintenance costs; large rotors run at low speeds, with higher efficiency, lower noise, lower vibration, and lower energy consumption.

2. High-quality independent oil pump forced lubrication design
(1) Forced lubrication with independent oil pump;
(2) Ensure that there is sufficient fuel injection and a better air-fuel mixture ratio under extremely low exhaust pressure (2kg).

3. Increase customized oil and gas separation system
Increase the customized oil and gas separation system to ensure the ultimate oil and gas separation effect and ensure that the oil content of the air is less than 3ppm.

Product Parameters

Low-pressure permanent magnet variable frequency air compressor parameters:

Model Volume flow(m3/min) Pressure(Mpa/bar) Power(kW) Noise(DB) Outlet diameter Dimension(mm) Weight(kg)
DHH37LM 10.0 0.3/3 37 65 G2 2000*1120*1590 1180
9.6 0.4/4
8 0.5/5
DHH45LM 15.1 0.2/2 45 65 G2 2100*1677*1892 2500
12.2 0.4/4
9.3 0.5/5
DHH55LM 22 0.2/2 55 70 DN150 2800*1860*1900 3200
15.61 0.3/3 DN100 2100*1677*1892 2600
15.48 0.4/4
12.00 0.5/5
DHH75LMH 29.5 0.2/2 75 70 DN150 2800*1860*1900 3200
21.5 0.3/3
21.0 0.4/4
16.1 0.5/5 DN65 2400*1630*1980 1850
DHH90LMH 31.0 0.2/2 90 72 DN150 2800*1860*1900 3300
28.8 0.3/3
21.0 0.5/5
DHH110LMH 37.0 0.2/2 110 72 DN200 2900*2100*2150 4800
33.0 0.3/3
28.5 0.4/4
DHH132LMH 47 0.2/2 132 78 DN200 2900*2100*2150 4950
43.8 0.3/3
32.5 0.4/4
28.3 0.5/5 DN80 2800*1828*2150 3600
DHH160LMH 55.7 0.2/2 160 78 DN300 4500*2200*2200 6800
49.4 03/3 DN200 2900*2100*2150 5100
43.0 0.4/4
DHH185LMH 60.0 0.3/3 185 78 DN200 4500*2200*2200 6900
43.0 0.5/5

Parameters of two-stage low-pressure screw air compressor:

Model Volume flow(m3/min) Power(kW) Noise(DB) Outlet diameter Dimension(mm) Weight(kg)
0.45~0.5mpa 0.55mpa
DHH30LDM 7.06 6.95 30 68 G2 1600*1060*1470 1338
DHH37LDM 10.0 9.20 37 68 G2 1600*1060*1470 1438
DHH45LDM 11.98 11.65 45 70 DN65 2400*1630*1980 1734
DHH55LDM 15.57 15.48 55 70 DN65 2400*1630*1980 1980
DHH75LDM 18.51 18.32 75 72 DN65 2400*1630*1980 2080
DHH90LDM 22.92 22.51 90 72 DN80 2800*1828*2150 4700
DHH110LDM 26.81 26.11 110 72 DN80 2800*1828*2150 4850
DHH132LDM 32.5 31.98 132 78 DN80 2800*1828*2150 4850
DHH160LDM 41.11 40.68 160 78 DN100 3000*1900*2190 5000
DHH185LDM 43.88 43.52 185 78 DN100 4360*2150*2258 7200
DHH220LDM 55.31 55.06 220 80 DN200 4360*2150*2258 7200
DHH250LDM 60.31 60.12 250 80 DN200 4360*2150*2258 7500


Company Profile

We’re professional compressor factory since 1996. Germany Standard and 13 years exporting experience help us won more than 50 loyal foreign agents. 

Our products line are complete,main products as below.
1. Ordinary fixed speed air compressor

2. Energy saving series:
VSD screw air compressor
Permanent magnet VSD screw air compressor
Double stage PM VSD screw air compressor

3. Oil free series:
Oil free water lube screw air compressor
Dry oil free type
Oil free scroll type

4. Low pressure series:
3-5bar, main for textile industry
0.4-1.5 bar,main for waste water treatment

5. 16bar-30bar special for laser cutting industry

6. After-treat equipment
Refrigerated air dryer
Desiccant air dryer
High efficiency pipeline filter

And all the compressor parts.

Packaging & Shipping

Why choose us


Q1. Are you trading company or manufacture ?

A: We are professional manufacture of screw air compressor of HangZhou(Close to ZheJiang ), China, more than 24 years.

Q2. How long is the delivery time ?
A: For standard voltage ,15 working days. Non-standard ,please contact our sales.

Q3. What’s payment term ?
A: T/T, L/C, D/P, Western Union, Paypal, Credit Card, and etc. Also we could accept USD, RMB, Euro and other currency.

Q4. How about your after-sales service ?
A: 1.Provide customers with installation and commissioning online instructions.
  2. Well-trained engineers available to overseas service.
  3.CHINAMFG agents and after service avaiable.arrange our engineers to help you training and installation.

Q5. How about your warranty?
A: One year for the whole machine and 2 years for screw air end, except consumable spare parts.

Q6. Do you have any certificate ?
A: Yes, per different customer’s market need ,we can offer CE ,ISO etc certificate.

Q7. What about the maintenance ?
A: First maintenance need to be done after 500Hours, and then every 2000-3000 hours to do the normal maintenance, and consider the actual environment.

Q8. How do you control quality ?
A: 1.The raw materials are strictly inspected
      2. Some key parts are imported from overseas
      3.Each compressor must pass at least 5 hours of continuous testing before leaving the factory.

Q9. Do you offer OEM service ?
A: Yes.Both OEM & ODM service can be accepted.

Q10.How long could your air compressor be used?
A: Generally, more than 10 years.

After-sales Service: Online Support
Warranty: 24montrhs
Lubrication Style: Lubricated
Cooling System: Air Cooling
Power Source: AC Power
Cylinder Position: Vertical


air compressor

What are the energy-saving technologies available for air compressors?

There are several energy-saving technologies available for air compressors that help improve their efficiency and reduce energy consumption. These technologies aim to optimize the operation of air compressors and minimize energy losses. Here are some common energy-saving technologies used:

1. Variable Speed Drive (VSD) Compressors:

VSD compressors are designed to adjust the motor speed according to the compressed air demand. By varying the motor speed, these compressors can match the output to the actual air requirement, resulting in energy savings. VSD compressors are particularly effective in applications with varying air demands, as they can operate at lower speeds during periods of lower demand, reducing energy consumption.

2. Energy-Efficient Motors:

The use of energy-efficient motors in air compressors can contribute to energy savings. High-efficiency motors, such as those with premium efficiency ratings, are designed to minimize energy losses and operate more efficiently than standard motors. By using energy-efficient motors, air compressors can reduce energy consumption and achieve higher overall system efficiency.

3. Heat Recovery Systems:

Air compressors generate a significant amount of heat during operation. Heat recovery systems capture and utilize this wasted heat for other purposes, such as space heating, water heating, or preheating process air or water. By recovering and utilizing the heat, air compressors can provide additional energy savings and improve overall system efficiency.

4. Air Receiver Tanks:

Air receiver tanks are used to store compressed air and provide a buffer during periods of fluctuating demand. By using appropriately sized air receiver tanks, the compressed air system can operate more efficiently. The tanks help reduce the number of starts and stops of the air compressor, allowing it to run at full load for longer periods, which is more energy-efficient than frequent cycling.

5. System Control and Automation:

Implementing advanced control and automation systems can optimize the operation of air compressors. These systems monitor and adjust the compressed air system based on demand, ensuring that only the required amount of air is produced. By maintaining optimal system pressure, minimizing leaks, and reducing unnecessary air production, control and automation systems help achieve energy savings.

6. Leak Detection and Repair:

Air leaks in compressed air systems can lead to significant energy losses. Regular leak detection and repair programs help identify and fix air leaks promptly. By minimizing air leakage, the demand on the air compressor is reduced, resulting in energy savings. Utilizing ultrasonic leak detection devices can help locate and repair leaks more efficiently.

7. System Optimization and Maintenance:

Proper system optimization and routine maintenance are essential for energy savings in air compressors. This includes regular cleaning and replacement of air filters, optimizing air pressure settings, ensuring proper lubrication, and conducting preventive maintenance to keep the system running at peak efficiency.

By implementing these energy-saving technologies and practices, air compressor systems can achieve significant energy efficiency improvements, reduce operational costs, and minimize environmental impact.

air compressor

How does the horsepower of an air compressor affect its capabilities?

The horsepower of an air compressor is a crucial factor that directly impacts its capabilities and performance. Here’s a closer look at how the horsepower rating affects an air compressor:

Power Output:

The horsepower rating of an air compressor indicates its power output or the rate at which it can perform work. Generally, a higher horsepower rating translates to a greater power output, allowing the air compressor to deliver more compressed air per unit of time. This increased power output enables the compressor to operate pneumatic tools and equipment that require higher air pressure or greater airflow.

Air Pressure:

The horsepower of an air compressor is directly related to the air pressure it can generate. Air compressors with higher horsepower ratings have the capacity to produce higher air pressures. This is particularly important when operating tools or machinery that require specific air pressure levels to function optimally. For example, heavy-duty pneumatic tools like jackhammers or impact wrenches may require higher air pressure to deliver the necessary force.

Air Volume:

In addition to air pressure, the horsepower of an air compressor also affects the air volume or airflow it can provide. Higher horsepower compressors can deliver greater volumes of compressed air, measured in cubic feet per minute (CFM). This increased airflow is beneficial when using pneumatic tools that require a continuous supply of compressed air, such as paint sprayers or sandblasters.

Duty Cycle:

The horsepower rating of an air compressor can also influence its duty cycle. The duty cycle refers to the amount of time an air compressor can operate continuously before it needs to rest and cool down. Higher horsepower compressors often have larger and more robust components, allowing them to handle heavier workloads and operate for longer periods without overheating. This is particularly important in demanding applications where continuous and uninterrupted operation is required.

Size and Portability:

It’s worth noting that the horsepower rating can also affect the physical size and portability of an air compressor. Higher horsepower compressors tend to be larger and heavier due to the need for more substantial motors and components to generate the increased power output. This can impact the ease of transportation and maneuverability, especially in portable or mobile applications.

When selecting an air compressor, it is essential to consider the specific requirements of your intended applications. Factors such as desired air pressure, airflow, duty cycle, and portability should be taken into account. It’s important to choose an air compressor with a horsepower rating that aligns with the demands of the tools and equipment you plan to operate, ensuring optimal performance and efficiency.

Consulting the manufacturer’s specifications and guidelines can provide valuable information on how the horsepower rating of an air compressor corresponds to its capabilities and suitability for different tasks.

air compressor

What are the different types of air compressors?

There are several different types of air compressors, each with its own unique design and operating principle. Here’s an overview of the most commonly used types:

1. Reciprocating Air Compressors: Reciprocating air compressors, also known as piston compressors, use one or more pistons driven by a crankshaft to compress air. They operate by drawing air into a cylinder, compressing it with the piston’s up-and-down motion, and discharging the compressed air into a storage tank. Reciprocating compressors are known for their high pressure capabilities and are commonly used in industrial applications.

2. Rotary Screw Air Compressors: Rotary screw air compressors utilize two interlocking screws to compress air. As the male and female screws rotate, the air is trapped between them and gradually compressed as it moves along the screw threads. These compressors are known for their continuous duty cycle, high efficiency, and quiet operation. They are widely used in industrial, commercial, and automotive applications.

3. Centrifugal Air Compressors: Centrifugal air compressors rely on the principle of centrifugal force to compress air. They use a high-speed impeller to accelerate the incoming air and then convert the kinetic energy into pressure energy. Centrifugal compressors are commonly used in large-scale industrial applications that require high volumes of compressed air.

4. Rotary Vane Air Compressors: Rotary vane air compressors employ a rotor with sliding vanes that compress the air. As the rotor rotates, the vanes slide in and out of the rotor, creating compression chambers. Air is drawn in, trapped, and compressed as the vanes move. These compressors are compact, reliable, and suitable for small to medium-sized applications.

5. Axial Flow Air Compressors: Axial flow air compressors are primarily used in specialized applications such as aircraft engines and gas turbines. They utilize a series of rotating and stationary blades to compress air in a continuous flow. Axial flow compressors are known for their high flow rates and are designed for applications that require large volumes of compressed air.

6. Scroll Air Compressors: Scroll air compressors consist of two interlocking spirals or scrolls that compress the air. One spiral remains stationary while the other orbits around it, creating a series of expanding and contracting pockets that compress the air. Scroll compressors are compact, reliable, and commonly used in applications where low noise and oil-free air are required, such as medical and dental equipment.

These are just a few examples of the different types of air compressors available. Each type has its own advantages, capabilities, and ideal applications. The choice of air compressor depends on factors such as required pressure, flow rate, duty cycle, noise level, oil-free operation, and specific application requirements.

China supplier Hot Sale 5bar 37kw 50HP 30% Energy Saving Low Pressure Screw Air Compressor   with Good qualityChina supplier Hot Sale 5bar 37kw 50HP 30% Energy Saving Low Pressure Screw Air Compressor   with Good quality
editor by CX 2023-10-11

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