China Custom Best LPG Compressor for LPG Filling Station Biogas Compressor Air Compressor for Sale 12v air compressor

Product Description

HangZhou CHINAMFG Gas Equipment Co.,Ltd, exporting diaphragm compressor, piston compressor, oxygen generator, gas cylinder and nitrogen generators with good quality and low price.

Piston compressor is a kind of piston reciprocating motion to make gas pressurization and gas delivery compressor mainly consists of working chamber, transmission parts, body and auxiliary parts. The working chamber is directly used to compress the gas, the piston is driven by the piston rod in the cylinder for reciprocating motion, the volume of the working chamber on both sides of the piston changes in turn, the volume decreases on 1 side of the gas due to the pressure increase through the valve discharge, the volume increases on 1 side due to the reduction of air pressure through the valve to absorb the gas.

Compressor for unloading and loading
Product description
This ZW series of oil-free compressors is 1 of the first products produced by our factory in China. The compressors have the advantage of low rotating speed, high component strength, stable operation, long service life and convenient maintenance. It is consist of compressor, gas-liquid separator, filter, two-position four-way valve, safety valve, check valve, explosion-proof motor and base etc. It has the characteristics of small size, light weight, low noise, good sealing, easy installation and easy operation.
This compressor is mainly used for unloading, loading, dumping, residual gas recovery and residual liquid recovery of LPG/C4, propylene and liquid ammonia. It is widely used in gas, chemical, energy and other industries, and is a key equipment in gas, chemical, energy and other

Note: In the process of unloading, the compressor pressurizes the gas from the storage tank and then presses it into the tanker through the gas phase line, and presses the liquid from the tanker to the storage tank through the pressure difference of the gas phase to complete the unloading
two process. When the gas phase is pressurized, the temperature of the gas phase will rise. At this time, it is not necessary to force it to cool, because if the gas phase is compressed and then cooled, it is easy to liquefy, and the pressure difference of the gas phase is difficult to establish,
which is not conducive to the replacement of the gas phase and the liquid phase. In short, it will prolong the unloading process time. If residual gas recovery is required, during the residual gas recovery operation, a cooler can be selected for forced cooling of the gas phase, so as to recover the residual gas as soon as possible.

The loading process is the opposite of the unloading process.

Propane-Butane Mix Compressor

Number Type Power(kW) Dimension (mm) Loading or unloading (t/h)
ZW-0.6/16-24 11 1000×680×870 ~15
ZW-0.8/16-24 15 1000×680×870 ~20
ZW-1.0/16-24 18.5 1000×680×870 ~25
ZW-1.5/16-24 30 1400×900×1180 ~36
ZW-2.0/16-24 37 1400×900×1180 ~50
ZW-2.5/16-24 45 1400×900×1180 ~60
ZW-3.0/16-24 55 1600×1100×1250 ~74
ZW-4.0/16-24 75 1600×1100×1250 ~98
VW-6.0/16-24 132 2400×1700×1550 ~147

Inlet pressure:≤1.6MPa
Outlet pressure: ≤2.4MPa
Max differential pressure: 0.8MPa
Maximum Instantaneous Pressure Ratio:≤4
Cooling method: Air cooling

The unloading volume is calculated according to the inlet pressure of 1.6MPa, the outlet pressure of 2.4MPa, the inlet temperature of 40 ºC , and the density of propylene liquid of 614kg/m3. When the working conditions change, the unloading volume will change accordingly,
which is for reference only.

 Piping and Instrumentation Diagram of gas unloading  
 Liquid delivery
At the beginning, open the liquid phase pipeline between the tanker and the storage tank. If the liquid level in the tanker is higher than the storage tank, it will automatically flow into the storage tank. When the balance is reached, the flow will stop. If the liquid phase of the tanker is lower than the storage tank, directly start the compressor, the four-way valve is in the positive position, and the gas is extracted from the storage tank by the compressor and then discharged into the tanker. At this time, the pressure in the tank car rises, the pressure in the storage tank drops, and the liquid in the tank car flows into the storage tank. (as shown below)

 Surplus liquid recovery
The residual liquid recovery process is the opposite of liquid transfer. After the liquid is delivered, the four-way valve should be reversed, and the dotted line in the figure is closed. At this time, the remaining gas in the tanker is inhaled by the compressor, pressurized and then discharged to the storage tank until the pressure of the remaining gas drops to no recovery value. When recycling, pay attention that the compressor pressure ratio and exhaust temperature cannot exceed the allowable values.

The working principle of the four-way valve

Pull the handle of the four-way valve, when the four-way valve is in the position shown in Figure a, the A side is the intake air, and the gas flows from A to B, through the pipe, the intake filter part, the compressor intake pipe, the compressor, The compressor discharge pipe, the D end flows to the C end, and the C end is the exhaust end.  When the four-way valve is in the position of Figure B, the C end is the intake air, and the gas flows from the C end to the B end, through the pipe, the intake filter part, the compressor intake pipe, the compressor, the compressor exhaust pipe, and the D end It flows to end A, which is the exhaust end.

Reference example for selection and calculation of Propane-Butane Mix unloading compressor
.Selection of compressor inlet and outlet pressure
Saturated vapor pressure of Propane-Butane Mix at 20~36ºC

Temperature(ºC) Atmosphere Temperature(ºC) Atmosphere
20 8.4585 30 11.512
22 9.0125 32 12.212
24 9.5940 34 12.943
26 10.2040 36 13.708
28 10.8430    

In the case of high temperature, the saturated vapor pressure of Propane-Butane Mix is high, so the 16barg (inlet pressure)-24barg (outlet pressure) model is selected to meet the use environment when the temperature is high.
Note: The unit of pressure is kg/cm2


  • Compressor Flow Calculation

The specific flow calculation is more complicated and needs to be finally determined according to the calculation formula and experience. Only a simple calculation method is introduced here.

1. Calculate the volume of the tanker
According to the provided operating conditions, first determine the total volume flow required to unload the 15-ton Propane-Butane Mix tanker in 1 hour.
The specific gravity of Propane-Butane Mix is 0.618, so the volume of 15 tons of Propane-Butane Mix is: 15 ÷0.618=24.272m3; and since the tanker is not allowed to be full, it is generally about 80% of the tanker’s volume. The volume is 24.272+15×0.2=27.272, so the volume of the tanker should be 30m3.

2.Calculate flow
When the compressor is unloading, the pressure difference must first be established before the Propane-Butane Mix can be unloaded from the tanker to the storage tank. Generally, the time to establish the pressure difference is 15 minutes, so the actual unloading time is only about 45 minutes, that is, the required displacement is 30 ÷ 45 = 0.66667m3/min; and after the gas is pressurized from 16kg to 24kg by the compressor, the volume will be reduced to about 0.66667 (16 ÷ 24) of the original volume, then the compressor displacement is: 0.66667 ÷ 0.66667 =1m3/min

According to the above calculation, the compressor model is selected as ZW-1.1/16-24

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After-sales Service: Provide After-Sell Sevice
Warranty: 18monthes
Lubrication Style: Lubricated
Cooling System: Water Cooling
Cylinder Arrangement: Balanced Opposed Arrangement
Cylinder Position: Angular


air compressor

What role do air dryers play in compressed air systems?

Air dryers play a crucial role in compressed air systems by removing moisture and contaminants from the compressed air. Compressed air, when generated, contains water vapor from the ambient air, which can condense and cause issues in the system and end-use applications. Here’s an overview of the role air dryers play in compressed air systems:

1. Moisture Removal:

Air dryers are primarily responsible for removing moisture from the compressed air. Moisture in compressed air can lead to problems such as corrosion in the system, damage to pneumatic tools and equipment, and compromised product quality in manufacturing processes. Air dryers utilize various techniques, such as refrigeration, adsorption, or membrane separation, to reduce the dew point of the compressed air and eliminate moisture.

2. Contaminant Removal:

In addition to moisture, compressed air can also contain contaminants like oil, dirt, and particles. Air dryers help in removing these contaminants to ensure clean and high-quality compressed air. Depending on the type of air dryer, additional filtration mechanisms may be incorporated to enhance the removal of oil, particulates, and other impurities from the compressed air stream.

3. Protection of Equipment and Processes:

By removing moisture and contaminants, air dryers help protect the downstream equipment and processes that rely on compressed air. Moisture and contaminants can negatively impact the performance, reliability, and lifespan of pneumatic tools, machinery, and instrumentation. Air dryers ensure that the compressed air supplied to these components is clean, dry, and free from harmful substances, minimizing the risk of damage and operational issues.

4. Improved Productivity and Efficiency:

Utilizing air dryers in compressed air systems can lead to improved productivity and efficiency. Dry and clean compressed air reduces the likelihood of equipment failures, downtime, and maintenance requirements. It also prevents issues such as clogging of air lines, malfunctioning of pneumatic components, and inconsistent performance of processes. By maintaining the quality of compressed air, air dryers contribute to uninterrupted operations, optimized productivity, and cost savings.

5. Compliance with Standards and Specifications:

Many industries and applications have specific standards and specifications for the quality of compressed air. Air dryers play a vital role in meeting these requirements by ensuring that the compressed air meets the desired quality standards. This is particularly important in industries such as food and beverage, pharmaceuticals, electronics, and automotive, where clean and dry compressed air is essential for product integrity, safety, and regulatory compliance.

By incorporating air dryers into compressed air systems, users can effectively control moisture and contaminants, protect equipment and processes, enhance productivity, and meet the necessary quality standards for their specific applications.

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

Can air compressors be used for automotive applications?

Yes, air compressors can be used for various automotive applications and are commonly found in automotive repair shops, garages, and even in some vehicles. Here are some automotive applications where air compressors are frequently utilized:

1. Tire Inflation: Air compressors are commonly used to inflate tires in automotive applications. They provide a convenient and efficient way to inflate tires to the recommended pressure, ensuring optimal tire performance, fuel efficiency, and safety.

2. Air Tools: Air compressors power a wide range of pneumatic tools used in automotive repair and maintenance. These tools include impact wrenches, ratchet wrenches, air hammers, pneumatic drills, and sanders. Air-powered tools are favored for their high torque and power-to-weight ratio, making them suitable for heavy-duty automotive tasks.

3. Spray Painting: Air compressors are commonly used in automotive painting applications. They power airbrushes and spray guns that are used to apply paint, primer, and clear coats. Air compressors provide the necessary air pressure to atomize the paint and deliver a smooth and even finish.

4. Brake System Maintenance: Air compressors play a crucial role in maintaining and diagnosing automotive brake systems. They are used to pressurize the brake lines, allowing for proper bleeding of the system and detection of leaks or faults.

5. Suspension Systems: Some automotive suspension systems, such as air suspensions, rely on air compressors to maintain the desired air pressure in the suspension components. The compressor inflates or deflates the suspension as needed to provide a comfortable ride and optimal handling.

6. Cleaning and Dusting: Air compressors are used for cleaning automotive parts, blowing away dust and debris, and drying surfaces. They provide a high-pressure stream of air that effectively cleans hard-to-reach areas.

7. Air Conditioning Systems: Air compressors are a key component in automotive air conditioning systems. They compress and circulate refrigerant, allowing the system to cool and dehumidify the air inside the vehicle.

When using air compressors for automotive applications, it’s important to consider the specific requirements of the task at hand. Ensure that the air compressor has the necessary pressure and capacity to meet the demands of the application. Additionally, use appropriate air hoses, fittings, and tools that are compatible with the compressor’s output.

Overall, air compressors are versatile and valuable tools in the automotive industry, providing efficient power sources for a wide range of applications, from tire inflation to powering pneumatic tools and supporting various automotive systems.

China Custom Best LPG Compressor for LPG Filling Station Biogas Compressor Air Compressor for Sale   12v air compressorChina Custom Best LPG Compressor for LPG Filling Station Biogas Compressor Air Compressor for Sale   12v air compressor
editor by CX 2024-03-11