Product Description

Product Description


Permanent Magnet Frequency Conversion Screw Compressor

  • Tuowei PM Frequency Conversion CHINAMFG saves 10%-15% energy more than variable speed screw compressor, while it saves 30%-40% more than standard screw compressor.
  • High Efficiency PM Motor. With the highperformance permanent magnet material, PM motor won’t lose magnetism even under 120ºC and can run for more tha n 15 years. No motor bearing: permanent magnet rotor is installed directly on the stretch out shaft of male rotor. This structure doesn’t have the bearing and eliminates the motor bearing fault.Comparing to normal variable speed motor, the permanent magn et synchroous motor performs with even better energy efficiency.Especially in the low-speed condition, it can still maintain a high motor efficiency.

Technical Data:

Model SGPM (Low Pressure)
Type of Cooling   Air Cooling/Water cooling
Working Pressure psig 43.7 ~ 72.8
bar 3~5
  m3/min 8.24~ 39.83
Motor Power kw/hp 37~132
Starting Mode   Variable frequency
Type of Driving   Driect driven
Voltage   380V / 3PH / 50HZ / 60HZ
220V / 3PH / 50HZ / 60HZ
440V / 3PH / 50HZ / 60HZ
415V / 3PH / 50HZ / 60HZ 
Can be customized
Exhaust Oil Volum   <3ppm
Noise db 67±2
Outlet Air Humidity ºC ambient temperature+15ºC

Significant energy saving effect

Permanent magnet synchronous variable air compressor is always running in the loaded state, no uninstall run phenomenon, and this no power wastage. Permanent magnet synchronous motor efficiency is very high compared with ordinary motor efficiency by at least 2%, with less power    consumption and greater output torque, energy-saving effect is remarkable, fee energy consumption remained at the level of the most economical.

Introduction of permanent magnet synchronizing variable frequency compressor

The permanent magnet synchronizing variable frequency compressor is a most recent compressor with excellent quality and high efficiency and energy saving at present. It is an advanced technique owned by only a few advanced countries and zones in the world. It is a high-end tendency for the future compressor development. The design concept and technical measure has broken through the tradition technical concept. It integrates the most sophisticated and energy saving technical factors.

Strong support of frequency converter to compressor

The permanent magnet synchronizing variable frequency compressor is equipped with special frequency converter with wider frequency converting rang. With the rapid development of techniques, the variable frequency compressor has become a high-grade machine in the energy saving area. It can realize maximum energy saving effect with the permanent magnet synchronizing motor.

Product Parameters

Technical parameters of low pressure permanent magnet variable frequency screw air compressor

Model Capacity Pressure Spssd Pipe Diameter Weight Noise Dimensions
m3/min bar rpm KGS Db(A) L*W*H mm
SGPM 37 11.02  3 3050 2″ 920 67±2 1750*1200*1500
9.36  4 2600
8.24  5 2300
SGPM 45 10.80  4 3000 2″ 950 67±2 1750*1200*1500
10.02  5 2800
SGPM 55 17.30  3 2600 2″ 1150 67±2 1750*1200*1500
15.34  4 2300
13.31  5 2000
SGPM 75 23.01  3 3100 DN65 2850 70±2 2500*1600*1800
19.71  4 2940
17.97  5 2700
SGPM 90 22.14  4 3000 DN65 2950 70±2 2500*1600*1800
20.67  5 2800
SGPM 110 34.07  3 2400 DN100 3800 72±2 3000*1600*1900
29.48  4 2100
SGPM 132 39.83  3 3000 DN100 4000 72±2 3000*1600*1900
35.20  4 2800

Technical parameters of low pressure permanent magnet two-stage variable frequency screw air compressor

Model Power Capacity Pressure Pipe Diameter Weight Noise Dimensions
KW/HP m3/min bar KGS Db(A) L*W*H mm
SGPM 37II 37/50 9.69  4 RP2 1700 67±2 2100*1300*1550
9.39  5
SGPM 45II 45/60 12.20  4 RP2 2000 69±2 2100*1300*1550
11.51  5
SGPM 55II 55/75 15.25  4 RP2 2300 69±2 2100*1300*1550
14.50  5
SGPM 75II 75/90 19.50  4 DN80 2800 70±2 2500*1600*2000
19.00  5
SGPM 90II 90/120 22.42  4 DN80 3000 70±2 2500*1600*2000
24.07  5
SGPM 110II 110/150 28.00  3 DN80 4000 72±2 2500*1600*2000
27.45  4
SGPM 132II 132/175 38.82  3 DN100 5000 72±2 3000*2000*2200
35.23  4
SGPM 160II 160/200 44.07  3 DN100 5800 72±2 3000*2000*2200
41.20  4
SGPM 185II 185/250 50.58  3 DN125 7000 72±2 3000*2000*2200
45.78  4
SGPM 200II 200/270 56.00  3 DN125 7500 72±2 3000*2000*2200
50.46  4

Company Profile



Q1: What is the rotor speed for the air end?

A1: 2980rmp.

Q2: What’s your lead time?
A2: usually, 5-7 days. (OEM orders: 15days)

Q3: Can you offer water cooled air compressor?
A3: Yes, we can (normally, air cooled type).

Q4: What’s the payment term?
A4: T/T, L/C, Western Union, etc. Also we could accept USD, RMB, and other currency.

Q5: Do you accept customized voltage?
A5: Yes. 380V/50Hz/3ph, 380V/60Hz/3ph, 220V/50Hz/3ph, 220V/60Hz/3ph, 440V/50Hz/3ph, 440V/60Hz/3ph, or as per your requests.

Q6: What is your warranty for air compressor?
A6: One year for the whole air compressor(not including the consumption spare parts) and technical supports can be provided according to your needs.

Q7: Can you accept OEM orders?
A7: Yes, OEM orders are warmly welcome.

Q8: How about your customer service and after-sales service?
A8: 24hrs on-line support, 48hrs problem solved promise.

Q9: Do you have spare parts in stock?
A9: Yes, we do.

Q10: What kind of initial lubrication oil you used in air compressor?
A10: TOTAL 46# mineral oil.

Lubrication Style: Lubricated
Cooling System: Air Cooling
Power Source: AC Power
Cylinder Position: Vertical
Structure Type: Closed Type
Installation Type: Stationary Type


What Is the Noise Level of Gas Air Compressors?

The noise level of gas air compressors can vary depending on several factors, including the compressor’s design, engine type, operating conditions, and the presence of noise-reducing features. Here’s a detailed explanation:

1. Compressor Design:

The design of the gas air compressor can influence its noise level. Some compressors are engineered with noise reduction in mind, utilizing features such as sound insulation, vibration dampening materials, and mufflers to minimize noise generation. Compressors with enclosed cabinets or acoustic enclosures tend to have lower noise levels compared to open-frame compressors.

2. Engine Type:

The type of engine used in the gas air compressor can impact the noise level. Gas air compressors typically use internal combustion engines powered by gasoline or propane. Gasoline engines tend to produce higher noise levels compared to diesel engines or electric motors. However, advancements in engine technology have led to quieter gasoline engines with improved noise control.

3. Operating Conditions:

The operating conditions of the gas air compressor can affect the noise level. Factors such as the load capacity, speed of operation, and ambient temperature can influence the amount of noise generated. Compressors operating at higher loads or speeds may produce more noise compared to those running at lower levels.

4. Noise-Reducing Features:

Some gas air compressors are equipped with noise-reducing features to minimize sound emissions. These may include built-in silencers, acoustic enclosures, or noise-absorbing materials. Such features help dampen the noise produced by the compressor and reduce its overall noise level.

5. Manufacturer Specifications:

Manufacturers often provide noise level specifications for their gas air compressors. These specifications typically indicate the sound pressure level (SPL) in decibels (dB) at a specific distance from the compressor. It is important to refer to these specifications to get an idea of the expected noise level of a particular compressor model.

6. Distance and Location:

The distance between the gas air compressor and the listener can impact the perceived noise level. As sound waves disperse, the noise level decreases with distance. Locating the compressor in an area that is isolated or distant from occupied spaces can help minimize the impact of noise on the surrounding environment.

It is important to note that gas air compressors, especially those used in industrial or heavy-duty applications, can generate substantial noise levels. Occupational health and safety regulations may require the use of hearing protection for individuals working in close proximity to loud compressors.

Overall, the noise level of gas air compressors can vary, and it is advisable to consult the manufacturer’s specifications and consider noise-reducing features when selecting a compressor. Proper maintenance, such as regular lubrication and inspection of components, can also help minimize noise levels and ensure optimal performance.

What Are the Key Components of a Gas Air Compressor Control Panel?

A gas air compressor control panel typically consists of several key components. Here’s a detailed explanation:

1. Power Switch:

The power switch allows the operator to turn the compressor on or off. It is usually a toggle switch or a push-button switch located on the control panel.

2. Pressure Gauges:

Pressure gauges display the compressed air pressure at different stages of the compression process. Commonly, there are two pressure gauges: one to measure the incoming air pressure (suction pressure) and another to measure the outgoing compressed air pressure (discharge pressure).

3. Control Knobs or Buttons:

Control knobs or buttons are used to adjust and set various parameters of the compressor operation. These controls may include pressure settings, on/off timers, automatic start/stop functions, and other operational parameters specific to the compressor model.

4. Emergency Stop Button:

An emergency stop button is a critical safety feature that immediately shuts down the compressor in case of an emergency. Pressing the emergency stop button cuts off power to the compressor and stops its operation.

5. Motor Start/Stop Buttons:

Motor start and stop buttons allow the operator to manually start or stop the compressor motor. These buttons are used when manual control of the motor is required, such as during maintenance or troubleshooting.

6. Control Indicators:

Control indicators include various lights or LEDs that provide visual feedback about the compressor’s status and operation. These indicators may include power indicators, motor running indicators, pressure indicators, and fault indicators to signal any malfunctions or abnormal conditions.

7. Control Panel Display:

Some gas air compressors feature a control panel display that provides real-time information and feedback on the compressor’s performance. The display may show parameters such as operating pressure, temperature, maintenance alerts, fault codes, and other relevant information.

8. Start/Stop Control Circuit:

The start/stop control circuit is responsible for initiating and controlling the motor start and stop sequences. It typically includes relays, contactors, and other electrical components that enable the control panel to safely start and stop the compressor motor.

9. Safety and Protection Devices:

Gas air compressor control panels may incorporate safety and protection devices to safeguard the compressor and prevent potential damage or hazardous situations. These devices can include overload relays, thermal protection, pressure relief valves, and other safety features.

10. Control Panel Enclosure:

The control panel enclosure houses and protects the electrical components and wiring of the control panel. It provides insulation, protection from dust and moisture, and ensures the safety of the operator.

In summary, a gas air compressor control panel typically includes a power switch, pressure gauges, control knobs or buttons, emergency stop button, motor start/stop buttons, control indicators, control panel display (if applicable), start/stop control circuit, safety and protection devices, and a control panel enclosure. These components work together to monitor and control the compressor’s operation, ensure safety, and provide essential information to the operator.

What Are the Primary Applications of Gas Air Compressors?

Gas air compressors have a wide range of applications across various industries and activities. These compressors, powered by gas engines, provide a portable and versatile source of compressed air. Here’s a detailed explanation of the primary applications of gas air compressors:

1. Construction Industry:

Gas air compressors are extensively used in the construction industry. They power a variety of pneumatic tools and equipment, such as jackhammers, nail guns, impact wrenches, and concrete breakers. The portable nature of gas air compressors makes them ideal for construction sites where electricity may not be readily available or practical to use.

2. Agriculture and Farming:

Gas air compressors find applications in the agricultural sector. They are used to operate air-powered machinery and tools, including pneumatic seeders, sprayers, and agricultural pumps. Gas air compressors provide the necessary power to carry out tasks such as crop seeding, irrigation, and pest control in agricultural settings.

3. Recreational Activities:

Gas air compressors are commonly utilized in recreational activities. They are used to inflate tires, sports balls, inflatable structures, and recreational equipment such as air mattresses, rafts, and inflatable toys. Gas air compressors provide a convenient and portable solution for inflating various recreational items in outdoor settings.

4. Mobile Service Operations:

Gas air compressors are employed in mobile service operations, such as mobile mechanics, tire service providers, and mobile equipment repair services. These compressors power air tools and equipment required for on-site repairs, maintenance, and servicing of vehicles, machinery, and equipment. The mobility of gas air compressors allows service providers to bring their tools and compressed air source directly to the location of the service requirement.

5. Remote Job Sites:

Gas air compressors are well-suited for remote job sites or locations without access to electricity. They are commonly used in industries such as mining, oil and gas exploration, and remote construction projects. Gas air compressors power pneumatic tools, machinery, and drilling equipment in these environments, providing a reliable source of compressed air for operational needs.

6. Emergency and Backup Power:

In emergency situations or during power outages, gas air compressors can serve as a backup power source. They can power essential equipment and systems that rely on compressed air, such as emergency lighting, communication devices, medical equipment, and backup generators. Gas air compressors provide a reliable alternative power solution when electrical power is unavailable or unreliable.

7. Sandblasting and Surface Preparation:

Gas air compressors are used in sandblasting and surface preparation applications. They provide the high-pressure air necessary for propelling abrasive media, such as sand or grit, to remove paint, rust, or other coatings from surfaces. Gas air compressors offer the power and portability required for sandblasting operations in various industries, including automotive, metal fabrication, and industrial maintenance.

8. Off-Road and Outdoor Equipment:

Gas air compressors are commonly integrated into off-road and outdoor equipment, such as off-road vehicles, utility trucks, and recreational vehicles. They power air-operated systems, including air suspension systems, air brakes, air lockers, and air horns. Gas air compressors provide the necessary compressed air for reliable and efficient operation of these systems in rugged and outdoor environments.

Overall, gas air compressors have diverse applications in construction, agriculture, recreational activities, mobile service operations, remote job sites, emergency power backup, sandblasting, and various off-road and outdoor equipment. Their portability, versatility, and reliable power supply make them indispensable tools in numerous industries and activities.

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editor by CX 2023-10-04