Two Stage Fixed Speed

Home > Products > Oil-Injected Screw Air Compressor > Regular Pressure (7-16 Bar) > Two Stage Fixed Speed > Two Stage Fixed Speed Screw Air Compressor

Two Stage Fixed Speed Screw Air Compressor

Model:DH-Z Series; Brand: Dream

Rated Power: 55~355KW

Air Capacity: 7.8~77m³/min

Working Pressure: 0.8~1.3MPa

Product Features

1. Durable, efficient and stable air end.

2. Independent interstage cooling for higher energy efficiency.

3. Coupling connection, more energy saving.

4. Independent air intake for better cooling effect.

5. Integrated cooler integrates oil cooling and after cooling.

6. Cyclone internal and external oil separator barrel design to reduce air oil content.

7. Winding oil separator design, low-pressure loss, long life, reduce your maintenance cost.

8. IE3 motor, save your electricity cost.

9. IP54, Class B temperature rise motor is suitable for harsh environments such as with bad dust and high temperature.

10. High-temperature shutdown protection.

11. Motor overload protection.

12. Overpressure safety decompression system.

13. Optimize the shock-absorbing pad to reduce vibration and noise.

14. Place electrical components and oil separator and filtration modules that are easily damaged by high temperature in the cold room, which improves the service life of the unit.

15. Touch screen controller makes your operation comfortable.

16. Two-way pressure, one-way temperature control, more protection for series operation.

Two-stage compression, energy saving up to 15% compared to single stage

Two-stage compression, energy saving up to 15% compared to single stage

1. Two-stage compression, small compression ratio, less leakage, small bearing load, greatly improved bearing life.

2. Unique intercooler jet curtain design reduces the temperature of the air and saves the power required for compression.

3. The design idea of "large rotor, large bearing, low speed" is adopted to reduce noise and vibration and increase the life and stability of the air end.

4. The tooth surface is processed by the German KAPP rotor grinder to create a high-precision rotor, which is the first guarantee of high efficiency and stability of the air end.

5. Adopt a new type of 5: 6 asymmetric rotor tooth shape, high-precision three-coordinate measuring machine for comprehensive measurement, increase the air capacity by 5% -10%.

6. All imported quality bearings are used.

Specialized  motor for air compressor

Specialized motor for air compressor

1. Large starting torque.

2. Specialized motor for air compressor, imported quality bearings.

3. IE3 high energy efficiency motor, reduce your using cost.

4. Motor design is designed according to 1.2 coefficient.

5. Protection grade IP54, insulation grade F.

Permanent magnetic synchronous motor

Permanent magnetic synchronous motor

1. IP54 protection level, more stable and reliable than IP23 in harsh environments.

2. Oil-cooled design, use lubricating oil to cool the motor, the operating temperature of the motor is more stable, the life is longer, there is no motor axial fan, so there is no loss of energy efficiency of the axial fan.

3. Coaxial design with the main rotor of the air end, without coupling, loss of energy efficiency of the gearbox.

4. Using ceramic plated bearings to completely eliminate the effect of shaft current on bearings.

5. Using 38UH magnetic steel material, temperature resistance 180 ℃.

Customized vector inverter

Customized vector inverter

1. Professional customization, perfect match with motor.

2. Fully monitor the parameters of the motor, including the motor temperature, to reduce the risk of the high temperature of the motor.

3. Independent air duct design, strong environmental adaptability.

4. Quick response, the response time is less than 50mS.

5. Large low frequency torque, can output 180% rated torque.

Silent centrifugal fan

Silent centrifugal fan

1. The whole series adopts centrifugal fan, which is more efficient and more energy-saving.

2. Compared with axial fans, centrifugal fans have higher air pressure, lower noise and more energy saving.

3. Controlled by frequency conversion fan, the oil temperature is constant and the service life of lubricating oil is greatly extended.

4. Due to the high wind pressure, the cooler and filter are less likely to be blocked.

Three filters

Three filters

Air filter: the filter area exceeds 150% of the normal requirement, low the inlet pressure loss , and high energy efficiency.

Oil filter: The design of the imported oil filter with enlarged glass fiber material is adopted. The rated processing capacity of the oil filter is ≥1.3 times of the circulating oil volume. The filtering accuracy is high and the durability is good.

Oil separator: imported glass fiber material oil core, good filtration effect, low oil core pressure loss.

Inlet valve

Inlet valve

Inlet valve: low flow speed test, low pressure loss, reduce energy consumption.

Minimum pressure check valve: low pressure loss, precise control, ultra-fast repositioning to ensure that the user's air does not return.

Temperature control valve: Mixed flow temperature control valve: The unit is equipped with a mixed flow temperature control valve to ensure that the unit is more convenient to start in a low temperature environment, and to ensure the unit is in the best performance state by controlling the oil supply temperature of the air end.





  • 1. Is it the same as regular machine debugging? (After sale)


    Same, just follow the commissioning manual

  • 2. How much does the maintenance cost? Is it high?


    Depending on the size of the equipment model, maintenance costs vary

  • 3. What are the maintenance supplies?


    Air filter, oil filter, oil separator, screw oil, grease

  • 4. Can the air compressor be turned on on the mobile phone?


    Our cloud IoT system supports mobile APP to view the operating status of the unit, and cannot operate the unit

  • 5. Can you see the operation of the air compressor?


    Our cloud IoT system supports mobile APP to view the operating status of the unit, and cannot operate the unit

  • 6. Will the motor demagnetize?


    The magnetic steel of the permanent magnet synchronous motor we use is neodymium iron boron permanent magnet material. Can be used for a long time under normal use

  • 7. What kind of fan is the fan?


    Our DHV-Z series of silent and energy-saving bipolar compressor units use centrifugal fans. The cooling system of the whole machine has been factory tested, and the cooling effect can meet the long-term stable operation at an ambient temperature of 40℃.

  • 8. The failure rate is higher than ordinary, right?


    The two-stage compressor unit uses a large-rotor low-speed main engine, with longer bearing life and more stable operation

  • 9. What is an oil-cooled motor?


    Oil-cooled motors use lubricating oil for cooling, which has high cooling efficiency and is less affected by ambient temperature. Air-cooled motors use cooling air for cooling.

  • 10. What is the adjustment range of the frequency conversion?


    The frequency adjustment range of the permanent magnet frequency conversion unit is 40~100%

  • 11. Whether the motor is the first energy efficiency IE4 motor is the first energy efficiency IE4 motor


    Our permanent magnet motor efficiency value reaches IE4 standard

  • 12. Differences between oil-cooled motors and air-cooled motors.


    Oil-cooled motors use lubricating oil for cooling, which has high cooling efficiency and is less affected by ambient temperature. Air-cooled motors use cooling air for cooling.

  • 13. Motor cooling method


    The motor of Dream's DHV-Z series energy-saving and silent bipolar compressor unit uses an air-cooled motor

  • 14. Air compressor energy efficiency rating


    Dream's DHV-Z series energy-saving silent bipolar compressor unit has an energy efficiency rating of level 1. You can find our company's filing information on the energy efficiency filing website

For more than a decade, Dream (Shanghai) Compressor Co., Ltd has been striving to become one of the leading manufacturers of compressed air solutions in China.

Contact Us

Mob.: +86-13671551445


WhatsApp: +86-13671551445

Add.: No.30 Caoli Road, Jinshan District, Shanghai, China

Request a Quote

Copyright © Dream (Shanghai) Compressor Co., Ltd. All Rights Reserved | Sitemap