China Professional Dandoss Air Compressor Used for Refrigeration with high quality

Product Description

Dandoss Air Compressor used for refrigeration

Compressor Features:
1.SM/SY/SZ series,50-60hz,R22-R407C-R134a-R404A-R507A.
2.SM/SY/SZ scroll compressor , Two orbiting scroll in upper part of the compressor,do compressed gas.
3.Air compressor back through suction mouth into the compressor.
4.All of the air flow through the motor, ensure the machine can completely cooled under all applications, oil separation and the drops of oil pool.
5.After leave the motor, gas enter into the orbiting scroll to compress.
6. In the end, the compression leave compressor exhaust from vent.

Compressor Parameters:

Model Nominal cooling capacity Nominal cooling capacity Input Power
Net weight
TR  (w) (Btu
(Kw) (W/W) (Btu/h/W) (cm3/Rev.) (m3/h) dm3 (kg)
R22 SM084 7 20400 69600 6.12 3.33 11.4 114.5 19.92 3.3 64
SM090 7.5 21800 74400 6.54 3.33 11.4 120.5 20.97 3.3 65
SM100 8 23100 79000 6.96 3.33 11.3 127.2 22.13 3.3 65
SM110 9 25900 88600 7.82 3.32 11.3 144.2 25.09 3.3 73
SM112 9.5 27600 94400 7.92 3.49 11.9 151.5 26.36 3.3 64
SM120 10 35710 157100 8.96 3.36 11.5 166.6 28.99 3.3 73
SM124 10 31200 106300 8.75 3.56 11.2 169.5 29.5 3.3 64
SM147 12 36000 123000 10.08 3.58 11.2 193.5 33.7 3.3 67
SM148 12 36100 123100 10.8 3.34 11.4 199.0 34.60 3.6 88
SM161 13 39000 133200 11.59 3.37 11.5 216.6 37.69 3.6 88
SM175 14 42000 143400 12.46 3.37 11.5 233.0 40.54 6.2 100
SM/SY185 15 45500 155300 13.62 3.34 11.4 249.9 43.48 6.2 100
SY240 20 61200 2 0571 0 18.20 3.36 11.5 347.8 60.50 8.0 150
SY300 25 78200 267000 22.83 3.43 11.7 437.5 76.10 8.0 157
SY380 30 94500 322700 27.4 3.46 11.8 531.2 92.40 8.4 158
R407C SZ084 7 19300 66000 6.13 3.15 10.7 114.5 19.92 3.3 64
SZ090 7.5 20400 69600 6.45 3.16 10.8 120.5 20.97 3.3 65
SZ100 8 21600 73700 6.84 3.15 10.8 127.2 22.13 3.3 65
SZ110 9 24600 84000 7.76 3.17 10.8 144.2 25.09 3.3 73
SZ120 10 28600 97600 8.98 3.18 10.9 166.6 28.99 3.3 73
SZ147 12 34900 119079 9.92 3.52 12.0 193.5 33.70 3.3 67
SZ148 12 35100 119800 10.99 3.19 10.9 199.0 34.60 3.6 88
SZ161 13 37900 129500 11.83 3.21 10.9 216.6 37.69 3.6 88
SZ175 14 45710 136900 12.67 3.17 10.8 233.0 40.54 6.2 100
SZ185 15 43100 147100 13.62 3.16 10.8 249.9 43.48 6.2 100
SZ240 20 59100 201800 18.60 3.18 10.9 347.8 60.50 8.0 150
SZ300 25 72800 248300 22.70 3.20 10.9 437.5 76.10 8.0 157
SZ380 30 89600 305900 27.60 3.25 11.1 531.2 92.40 8.4 158

Compressor Testing:
Our each process, each parts will be tested by our each production department with professional testing facilities to keep the quality proved.

Compressor Packing:

Each product will be packed by waterproof packages, then put in the thick and good quality cartons, around the products, some protecting materials will be toegther, then we seal it carefully to make the complete packing. After, we pile them carefully on the good-quality pallets. Finally the outside covers waterproof materials again to make it stronger and avoid the delivery problems.

our product:

Our company:
HangZhou Andwin Refrigeration Equipment Co.,Ltd
Add- No 91 Xihu (West Lake) Dis. Road New District HangZhou ZheJiang China
main product:
Insulation Copper Tube;
Aluminum Tube;
Copper Tube;
Brass Pipe.
Manifold gauge

Advanced One-Stop Purchasing Service-In Air-conditioning And Refrigeration Industry

Aimee Chen


Cop: Around 3.33W/W
Oil: 3.3~8.4dm3
E.E.R.: Around 11.1 BTU/H/W
Net Weight: 64~158kg
Displacement Volume: 114.5~531.2cm3/Rev.
Nominal Cooling Capacity: 7-30tr


air compressor

What are the advantages of using rotary vane compressors?

Rotary vane compressors offer several advantages that make them a popular choice for various applications. These compressors are widely used in industries where a reliable and efficient source of compressed air is required. Here are the advantages of using rotary vane compressors:

1. Compact and Lightweight:

Rotary vane compressors are typically compact and lightweight compared to other types of compressors. Their compact design makes them suitable for installations where space is limited, such as in small workshops or mobile applications. The lightweight nature of these compressors allows for easy transportation and maneuverability.

2. High Efficiency:

Rotary vane compressors are known for their high efficiency. The design of the vanes and the compression chamber allows for smooth and continuous compression, resulting in minimal energy losses. This efficiency translates into lower energy consumption and reduced operating costs over time.

3. Quiet Operation:

Rotary vane compressors operate with relatively low noise levels. The design of the compressor, including the use of vibration damping materials and sound insulation, helps to minimize noise and vibrations during operation. This makes rotary vane compressors suitable for applications where noise reduction is important, such as in indoor environments or noise-sensitive areas.

4. Oil Lubrication:

Many rotary vane compressors utilize oil lubrication, which provides several benefits. The oil lubrication helps to reduce wear and friction between the moving parts, resulting in extended compressor life and improved reliability. It also contributes to better sealing and improved efficiency by minimizing internal leakage.

5. Versatile Applications:

Rotary vane compressors are versatile and can be used in a wide range of applications. They are suitable for both industrial and commercial applications, including automotive workshops, small manufacturing facilities, dental offices, laboratories, and more. They can handle various compressed air requirements, from light-duty tasks to more demanding applications.

6. Easy Maintenance:

Maintenance of rotary vane compressors is relatively straightforward. Routine maintenance tasks typically include oil changes, filter replacements, and periodic inspection of vanes and seals. The simplicity of the design and the availability of replacement parts make maintenance and repairs easier and more cost-effective.

These advantages make rotary vane compressors an attractive choice for many applications, providing reliable and efficient compressed air solutions.

air compressor

How do you troubleshoot common air compressor problems?

Troubleshooting common air compressor problems can help identify and resolve issues that may affect the performance and functionality of the compressor. Here are some steps to troubleshoot common air compressor problems:

1. No Power:

  • Check the power source and ensure the compressor is properly plugged in.
  • Inspect the circuit breaker or fuse box to ensure it hasn’t tripped or blown.
  • Verify that the compressor’s power switch or control panel is turned on.

2. Low Air Pressure:

  • Check the air pressure gauge on the compressor. If the pressure is below the desired level, the compressor might not be building up enough pressure.
  • Inspect for air leaks in the system. Leaks can cause a drop in pressure. Listen for hissing sounds or use a soapy water solution to identify the location of leaks.
  • Ensure the compressor’s intake filter is clean and not clogged, as this can restrict airflow and reduce pressure.

3. Excessive Noise or Vibration:

  • Inspect the compressor’s mounting and foundation to ensure it is secure and stable. Loose mounts can cause excessive noise and vibration.
  • Check for loose or damaged components, such as belts, pulleys, or motor mounts. Tighten or replace as necessary.
  • Verify that the compressor’s cooling system, such as the fan or fins, is clean and free from obstructions. Overheating can lead to increased noise and vibration.

4. Air Leaks:

  • Inspect all connections, valves, fittings, and hoses for leaks. Tighten or replace any loose or damaged components.
  • Apply a soapy water solution to suspected areas and look for bubbles. Bubbles indicate air leaks.
  • Consider using thread sealant or Teflon tape on threaded connections to ensure a proper seal.

5. Excessive Moisture in Compressed Air:

  • Check the compressor’s drain valve and ensure it is functioning properly. Open the valve to release any accumulated moisture.
  • Inspect and clean the compressor’s moisture separator or air dryer, if equipped.
  • Consider installing additional filtration or drying equipment to remove moisture from the compressed air system.

6. Motor Overheating:

  • Ensure the compressor’s cooling system is clean and unobstructed.
  • Check the motor’s air intake vents and clean any dust or debris that may be blocking airflow.
  • Verify that the compressor is not being operated in an excessively hot environment.
  • Check the motor’s lubrication levels and ensure they are within the manufacturer’s recommended range.
  • Consider using a thermal overload protector to prevent the motor from overheating.

If troubleshooting these common problems does not resolve the issue, it may be necessary to consult the manufacturer’s manual or seek assistance from a qualified technician. Regular maintenance, such as cleaning, lubrication, and inspection, can also help prevent common problems and ensure the optimal performance of the air compressor.

air compressor

What is the difference between a piston and rotary screw compressor?

Piston compressors and rotary screw compressors are two common types of air compressors with distinct differences in their design and operation. Here’s a detailed explanation of the differences between these two compressor types:

1. Operating Principle:

  • Piston Compressors: Piston compressors, also known as reciprocating compressors, use one or more pistons driven by a crankshaft to compress air. The piston moves up and down within a cylinder, creating a vacuum during the intake stroke and compressing the air during the compression stroke.
  • Rotary Screw Compressors: Rotary screw compressors utilize two intermeshing screws (rotors) 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.

2. Compression Method:

  • Piston Compressors: Piston compressors achieve compression through a positive displacement process. The air is drawn into the cylinder and compressed as the piston moves back and forth. The compression is intermittent, occurring in discrete cycles.
  • Rotary Screw Compressors: Rotary screw compressors also employ a positive displacement method. The compression is continuous as the rotating screws create a continuous flow of air and compress it gradually as it moves along the screw threads.

3. Efficiency:

  • Piston Compressors: Piston compressors are known for their high efficiency at lower flow rates and higher pressures. They are well-suited for applications that require intermittent or variable air demand.
  • Rotary Screw Compressors: Rotary screw compressors are highly efficient for continuous operation and are designed to handle higher flow rates. They are often used in applications with a constant or steady air demand.

4. Noise Level:

  • Piston Compressors: Piston compressors tend to generate more noise during operation due to the reciprocating motion of the pistons and valves.
  • Rotary Screw Compressors: Rotary screw compressors are generally quieter in operation compared to piston compressors. The smooth rotation of the screws contributes to reduced noise levels.

5. Maintenance:

  • Piston Compressors: Piston compressors typically require more frequent maintenance due to the higher number of moving parts, such as pistons, valves, and rings.
  • Rotary Screw Compressors: Rotary screw compressors have fewer moving parts, resulting in lower maintenance requirements. They often have longer service intervals and can operate continuously for extended periods without significant maintenance.

6. Size and Portability:

  • Piston Compressors: Piston compressors are available in both smaller portable models and larger stationary units. Portable piston compressors are commonly used in construction, automotive, and DIY applications.
  • Rotary Screw Compressors: Rotary screw compressors are typically larger and more suitable for stationary installations in industrial and commercial settings. They are less commonly used in portable applications.

These are some of the key differences between piston compressors and rotary screw compressors. The choice between the two depends on factors such as required flow rate, pressure, duty cycle, efficiency, noise level, maintenance needs, and specific application requirements.

China Professional Dandoss Air Compressor Used for Refrigeration   with high qualityChina Professional Dandoss Air Compressor Used for Refrigeration   with high quality
editor by CX 2023-09-30