China Best Sales Hot Sales Shang Air 40bar 30HP 4.0MPa High Medium Pressure Piston Air Compressor portable air compressor

Product Description

Piston air compressor
A piston type air compressor is a type of reciprocating air compressor, whose compression component is a piston, which reciprocates inside the cylinder and moves with the same gas as the piston. Derivative products include air compressors, assembly line equipment, plastic machines, fans,etc.
Basic composition of piston air compressor:

1. Exhaust valve  2. Cylinder  3. Piston  4. Piston rod  5. Slider  6. Connecting rod  7. Crane 8. Suction valve  9. Valve spring

 operational principle

    When the reciprocating piston in the cylinder moves to the right, the pressure in the left chamber of the piston in the cylinder is lower than atmospheric pressure pa, the suction valve opens, and external air is sucked into the cylinder. This process is called compression. When the pressure in the cylinder is higher than the pressure p in the output air pipeline, the exhaust valve opens. The process of compressed air being sent into the gas pipeline is called the exhaust process. The reciprocating motion of the piston is formed by a crank slider mechanism driven by an electric motor. The rotational motion of the crank is converted into sliding – the reciprocating motion of the piston.

83SH (Vertical double machine) Series:
Air discharge  :2.0-6.0Nm3/min
Discharge pressure:4.0Mpa
installed capacity:30HP×2(22 KW ×2) 

Series Model Air discharge (Nm3/min) Discharge pressure(Mpa) Motor Power(kw) Weight
83SH 83SH-2240 2.0 4.0 22 680 1800*1571*1050
2-83SH-2240 4.0 4.0 22*2 1550

Packaging & Shipping


Company Profile


Q1: How many coutries you already exported?
A: Exported to more than 50 countries mainly from America,Russia,Brazil,Bangladesh,Egypt,Kuwait,Turkey,Jordan,Dubai,Iran,Peru,India,Malaysia,Vietnam,Indonesia,Singapore etc.

Q2: Is it OK to print my logo on products ?
A: Yes , OEM and ODM are available for us.

Q3: How could you guarantee your products ?
A: Each piece of products is manufactured by certified workshops, inspected by piece according to national QA/QC standard. We also could issue the warranty to customer to guarantee the quality.

Q4: Can we visit your factory before order?
A: Sure, we warmly welcome you to visit our factory at any time. The more you know us, the more you trust us! So you can rest assured on our quality products and our best services.

Q5: Will you delivery the goods on time?
A: Yes,we promise to deliver on time,indemnity clause in contact.

After-sales Service: 1 Year
Warranty: 1 Year
Lubrication Style: Oil-less
Cooling System: Water Cooling
Cylinder Arrangement: Balanced Opposed Arrangement
Cylinder Position: Vertical


air compressor

What are the differences between stationary and portable air compressors?

Stationary and portable air compressors are two common types of air compressors with distinct features and applications. Here are the key differences between them:

1. Mobility:

The primary difference between stationary and portable air compressors is their mobility. Stationary air compressors are designed to be permanently installed in a fixed location, such as a workshop or a factory. They are typically larger, heavier, and not easily movable. On the other hand, portable air compressors are smaller, lighter, and equipped with handles or wheels for easy transportation. They can be moved from one location to another, making them suitable for jobsites, construction sites, and other mobile applications.

2. Power Source:

Another difference lies in the power source used by stationary and portable air compressors. Stationary compressors are usually powered by electricity, as they are designed for continuous operation in a fixed location with access to power outlets. They are connected to the electrical grid or have dedicated wiring. In contrast, portable compressors are available in various power options, including electric, gasoline, and diesel engines. This versatility allows them to operate in remote areas or sites without readily available electricity.

3. Tank Capacity:

Tank capacity is also a distinguishing factor between stationary and portable air compressors. Stationary compressors often have larger storage tanks to store compressed air for extended periods. The larger tanks enable them to deliver a continuous and steady supply of compressed air for longer durations without the need for frequent cycling. Portable compressors, due to their compact size and portability, generally have smaller tank capacities, which may be sufficient for intermittent or smaller-scale applications.

4. Performance and Output:

The performance and output capabilities of stationary and portable air compressors can vary. Stationary compressors are typically designed for high-volume applications that require a consistent and continuous supply of compressed air. They often have higher horsepower ratings, larger motor sizes, and higher air delivery capacities. Portable compressors, while generally offering lower horsepower and air delivery compared to their stationary counterparts, are still capable of delivering sufficient air for a range of applications, including pneumatic tools, inflation tasks, and light-duty air-powered equipment.

5. Noise Level:

Noise level is an important consideration when comparing stationary and portable air compressors. Stationary compressors, being larger and built for industrial or commercial settings, are often equipped with noise-reducing features such as sound insulation and vibration dampening. They are designed to operate at lower noise levels, which is crucial for maintaining a comfortable working environment. Portable compressors, while efforts are made to reduce noise, may produce higher noise levels due to their compact size and portability.

6. Price and Cost:

Stationary and portable air compressors also differ in terms of price and cost. Stationary compressors are generally more expensive due to their larger size, higher power output, and industrial-grade construction. They often require professional installation and may involve additional costs such as electrical wiring and system setup. Portable compressors, being smaller and more versatile, tend to have a lower upfront cost. They are suitable for individual users, contractors, and small businesses with budget constraints or flexible air supply needs.

When selecting between stationary and portable air compressors, it is essential to consider the specific requirements of the intended application, such as mobility, power source availability, air demands, and noise considerations. Understanding these differences will help in choosing the appropriate type of air compressor for the intended use.

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 Best Sales Hot Sales Shang Air 40bar 30HP 4.0MPa High Medium Pressure Piston Air Compressor   portable air compressorChina Best Sales Hot Sales Shang Air 40bar 30HP 4.0MPa High Medium Pressure Piston Air Compressor   portable air compressor
editor by CX 2023-12-12