Tag Archives: lg air compressor

China LG Air Conditioner Compressor Qp425p for Air Cooler air compressor lowes

Merchandise Description

 

                                1.Merchandise Description

LG Air Conditioner Compressor GPS250P for refrigerator 
Brand LG
Product   QP425P  
Potential 3000 Piece/Items for each Thirty day period
Refrigerant  R410a
Shade Black
MOQ 1
Bundle Wood circumstance
cargo inside of 2 weeks
certificates CE

   

 

                                2.  Comprehensive Picture

                                                           3.  More Types for Referance

                                                                         
                                                              4. Packing & Deliver

                                               5.Our service 

A.12 Hours serives, rapid response

B. Exceptional top quality

C.5QC make certain each buy produced strictly as for every clients’ requests.

D. Dispatch in time and keep in contact with clients anytime 

E.We will be reasonable charges and high quality merchandise, good soon after-sales service 

 

 If you should encounter any difficulties

Please do not wait in getting in contact.We are far more than pleased to discuss any problems you might have. 

                                                       

                                              6.FAQ

FAQ 

1,What is your MOQ? 

Our MOQ is usually 1 set.

 

2,  What is the cost?
The price tag is made the decision by Quantity and Different Brand name.

 

three,What is your delievery time? 

The time of delievery is 7-15 functioning times after payment.

 

four,What is the transport port? 

We ship the merchandise via HangZhou or HangZhou,China.

 

5,What is your payment phrases?

 We accept 30% T/T in progress,70% in the period of time of shipping.

 

six,What is the location of your business? 

Our factory is situated in HangZhou Metropolis,ZheJiang Province,China.If you would like to have a visit, you are warmly welcome.

 

seven,What is your main merchandise? 

Focus on: 

Semi-airtight compressor
Hermetic Compressor
Refrigeration Compressor Device
 

eight,  How about samples?
Sample Direct Time: 2 or 3 working days
Sample Fee: 
1).It truly is cost-free for all for a regular customer  
two).for new clients, we will demand 1st, it is totally refundable when order verified. 

                                          7. About us 
 

HangZhou Meituo Electrical Refrigeration Equipment Co., Ltd.  is mainly engaged in the manufacturing and sale compressor that employed for fridge, air conditioning, chilly area ect.

We supply distinct sorts of compressors with diverse makes, the very best high quality,aggressive price ,lowest MOQ ,fast shipping and delivery.

We constantly try to provide the greatest provider to our customers and purpose to fultill the requests of our clients, all staff in our factory comply with our policy of placing clients at the 1st location.

 

For compressor,We offer subsequent brands.

1.Rotary compressor: Toshiba,Panasonic

two.Scroll: Copeland, CZPT performer, hitachi, Daikin, Sanyo
three.Piston: CZPT MT,NTZ,MTZ sequence.
4.Freezer compressor: Tecumseh
5.Semi-airtight: Copeland,bitzer

  

                                                   8.Certificate  

   

                                        

                                    9.  Contact US  

Lily 

MEITUO CO.,Constrained

 

 

 

http://meituo

US $299-499
/ Set
|
1 Set

(Min. Order)

###

Color: Black
Voltage: 200V-240V
Frequency: 50 Hz
BTU/H: 10750
Eep: 9.5
Cop: 2.78

###

Customization:

###

LG Air Conditioner Compressor GPS250P for refrigerator 
Brand LG
Model   QP425P  
Ability 3000 Piece/Pieces per Month
Refrigerant  R410a
Color Black
MOQ 1
Package Wooden case
shipment within 2 weeks
certificates CE

###

Dongguan Meituo Electrical Refrigeration Equipment Co., Ltd.  is mainly engaged in the production and sale compressor that used for refrigerator, air conditioning, cold room ect.

We supply different kinds of compressors with different brands, the best quality,competitive price ,lowest MOQ ,fast delivery.

We always strive to provide the best service to our customers and aim to fultill the requests of our customers, all employees in our factory follow our policy of putting customers at the first place.

 

For compressor,We supply following brands.

1.Rotary compressor: Toshiba,Panasonic

2.Scroll: Copeland, Danfoss performer, hitachi, Daikin, Sanyo
3.Piston: Maneurop MT,NTZ,MTZ series.
4.Freezer compressor: Tecumseh
5.Semi-hermetic: Copeland,bitzer

US $299-499
/ Set
|
1 Set

(Min. Order)

###

Color: Black
Voltage: 200V-240V
Frequency: 50 Hz
BTU/H: 10750
Eep: 9.5
Cop: 2.78

###

Customization:

###

LG Air Conditioner Compressor GPS250P for refrigerator 
Brand LG
Model   QP425P  
Ability 3000 Piece/Pieces per Month
Refrigerant  R410a
Color Black
MOQ 1
Package Wooden case
shipment within 2 weeks
certificates CE

###

Dongguan Meituo Electrical Refrigeration Equipment Co., Ltd.  is mainly engaged in the production and sale compressor that used for refrigerator, air conditioning, cold room ect.

We supply different kinds of compressors with different brands, the best quality,competitive price ,lowest MOQ ,fast delivery.

We always strive to provide the best service to our customers and aim to fultill the requests of our customers, all employees in our factory follow our policy of putting customers at the first place.

 

For compressor,We supply following brands.

1.Rotary compressor: Toshiba,Panasonic

2.Scroll: Copeland, Danfoss performer, hitachi, Daikin, Sanyo
3.Piston: Maneurop MT,NTZ,MTZ series.
4.Freezer compressor: Tecumseh
5.Semi-hermetic: Copeland,bitzer

How to Repair and Maintain an Air Compressor

A compressor is a device used to move air from one place to another. Air enters the air compressor through the intake valve. Inside the compressor, the vanes on the inner rotor rotate within an eccentric cavity. The self-adjusting length arm divides the space into multiple cavities of different sizes. As the rotor rotates, air fills the cavity. As air flows around the cavity, it builds pressure and is squeezed out of the compressor output.

Positive displacement

Positive displacement air compressors use reciprocating pistons to compress air. Gas is drawn in during the suction stroke and compressed by moving the piston in the opposite direction. It then discharges the compressed air by moving it in the opposite direction. This type of air compressor is most commonly found in automobiles, refrigerators, and other applications that require high pressure. However, it is not as efficient as a centrifugal compressor.
Most modern air compressors use positive displacement. Positive displacement models capture a volume of air in the compression chamber and distribute it when the pump is operating at maximum capacity. They are more economical than their negative displacement counterparts. Reciprocating screw air compressors are the most common positive displacement compressors. The reciprocating screw air compressor adopts a water jacket around the cylinder and is often used in processes such as oil drilling.
A bicycle pump is an example of positive displacement compression. Air is drawn into the cylinder and compressed by the moving piston. A piston compressor works on the same principle, but it uses a rotating crankshaft or connecting rod to complete the movement of the pistons. There are two types of positive displacement compressors: single-acting and double-acting. Both types work on the same principle, both are positive displacement compressors. The difference between the two types is the pressure ratio.
In air compression, positive displacement compression reduces the volume of the fluid and reduces its viscosity. This results in higher pressure ratios and is used in centrifugal, axial, and scroll compressors. Positive displacement is a common feature of most air compressors. Positive displacement compressors offer the same benefits and are more energy-efficient when applied to oil-free and gas applications. This type of compression is usually the best choice for low-pressure applications.
air-compressor

oil free

If you’re looking for an air compressor for your business, consider an oil-free air compressor. These models offer cleaner, quieter operation than traditional air compressors and require less maintenance. They also meet ISO Class 0 or Class 1 air purity requirements. Oil-free air compressors are also quieter, with fewer moving parts and less noise. These advantages make oil-free air compressors an ideal solution for many commercial applications.
Air purity is critical in many industries. Even the tiniest drop of oil can damage production equipment or damage products. The best way to find an oil-free air compressor for your business is to consider the process and end product. As air quality improves, more and more businesses are turning to oil-free compressors. Some of the advantages and disadvantages of these air compressors are:
When choosing an oil-free air compressor, it is important to understand the terminology used in the industry. Knowing these terms will make it easier for you to choose the right compressor for your needs. ACTFM, or actual cubic feet per minute, is an industry term for measuring the amount of air pumped in one minute under rated conditions. Although a simple number, it can be very useful in determining which type of air compressor is best for your application.
The ISO 8573-1 international standard defines air quality and provides air purity classifications. The strictest classification is air purity class 0. Many manufacturers claim that oil-free air compressors meet this standard. However, a class 0 oil-free air compressor does not necessarily mean that the air is free of contaminants. In fact, Class 0 is the benchmark for air purity. While zero air quality is the highest level, that doesn’t mean it’s completely oil-free.
air-compressor

double acting

A double-acting air compressor is a device that uses compressed air to generate electricity. Its working principle is based on piston and connecting rod. The connecting rod connects the crankshaft to the piston through pins and caps. The piston moves as the piston moves. Rods are usually made of forged carbon steel. In terms of service and maintenance, double-acting compressors require regular vise maintenance and proper cleaning.
The displacement of the compressor is a measure of the displacement that the piston can produce in a certain period of time. Displacement is usually expressed in actual cubic feet per minute. The exact calculation depends on the type of cylinder and the configuration of the compressor. Single-acting cylinders can have head-end or crank-end displacement, both of which can be measured using the displacement equation. A double-acting air compressor will use this equation. 4 and 6 calculate the displacement.
Double-acting air compressors have multiple cylinders and are made of cast iron. They are water-cooled and have a mechanical connection between the piston and connecting rod. A double-acting compressor compresses air twice per revolution of the motor. One cylinder moves up, while the other cylinder moves down. The piston moves down, allowing air to enter through valve #1. During the operation of the compressor, the temperature of the air and gas increases.
Double-acting air compressors typically have high pressure and are considered workhorses. Double-acting compressors also feature intercooling and double compression. As a result, these machines tend to last longer than single-acting compressors. Its low speed and dual compression make it a workhorse in the compressor industry. Double-acting air compressors are workhorses and versatile devices.
air-compressor

fuel tank pressure switch

You can adjust the pressure in the air compressor tank by adjusting the differential pressure. You can turn the mainspring clockwise or counterclockwise to increase or decrease the pressure. This valve will open when the pressure is low enough to start the compressor. If the pressure is too low, the valve should be closed. The cut-in and cut-out pressures should be set to appropriate values. After adjusting the tank pressure, check the hysteresis of the tank pressure switch and set the desired shutoff pressure.
If the pressure in the tank falls below the cut-in level, the tank pressure switch must be replaced. You can test the switch with a multimeter. Make sure the switch is not damaged. If you can’t find the switch, you can look at the other sections. If you find any damaged or missing parts, you should replace them. Otherwise, it may be time to check the tank pressure switch. You may need to disassemble the compressor and remove the switch.
The fuel tank pressure switch is an important part of the air compressor. It keeps you informed of the amount of air delivered by the compressor. If your tank or tank is damaged, your readings will be wrong. If the pressure switch is damaged, it will not function properly and result in incorrect readings. Fortunately, there are some easy ways to fix this. To prevent this from happening, keep the tank pressure switch in good condition.
When the air pressure in the tank drops to the cut-in pressure setting, the switch allows power to flow through it. This will start the motor and pump of the air compressor. Then, if the pressure in the tank rises above the cut-off level, the switch will trip and stop the compressor. This will prevent it from being over-pressurized. Power flow will continue to flow to the motor. Depending on your compressor model, you can change the cut-in and cut-out pressures as needed.

energy source

The power supply of the air compressor is very important. Most air compressors run on 12 VDC, which is ideal for automotive use. Alternatively, you can buy a switching power supply for around $20. No matter which power supply you choose, you must ensure that it can support the maximum current of the compressor. You can find power supplies in all sizes, from quarter-horsepower to five-horsepower.
The voltage required for a three-phase air compressor will vary. Three-phase air compressors require three separate power cords and a three-phase electrical service panel. This is because a standard 120/240-volt electrical service panel is not sufficient to power a three-phase compressor. Additionally, three-phase compressors require three separate isolated wires for the engine and motor circuits. Three-phase compressors do not require a neutral wire.

China LG Air Conditioner Compressor Qp425p for Air Cooler     air compressor lowesChina LG Air Conditioner Compressor Qp425p for Air Cooler     air compressor lowes
editor by czh 2022-12-29

China Standard 50% CZPT Saving 11kw 15kw 30kw 37kw 8/10/13/16 Bar Permanent Magnet Inverter Stationary Rotary Screw Air Compressors LG Compressor Screw Air Compressor with Best Sales

Product Description

Inner detail photos of Y-air 11kw 15kw 30kw 37kw 8/10/13/16 bar Permanent Magnet Inverter Stationary  Rotary  Screw Air Compressors
Brief Introduction:
Air end: German Technology. 30 years designed lifetime.
Motor: 100% rare earth permanent magnet motor. 
Inverter: Chinese No. 1 inverter can save 30% energy.
Warranty: 5 years for the air end, and 2 years for the whole compressor. 
Delivery time: 7-15 days. 
After-sales service:we have our professional after-sales technician to instruct the installation of the whole screw air compressor.    
Motor Power: 30kw 40HP 
Working Pressure: 7 – 16bar
Air Delivery: 3.6 – 5.3m3/min
Type of Driving: Direct Driven
Type of Cooling: Air Cooling
Noise: 68dB
Size:
1250*870*1180mm
Weight: 750kg    

Advantages 
1 . Air end with high-efficiency
2. Double Screw with low noise, Super Silenced Enclosure
3. Elegant compact design. Fully open access door to inner parts for easy service.
4. 100% Continuous duty operation. Load/No Load operation
5. High quality CE Certificate industrial electric motors. ISO,CE,UL Certificate
6. Easy to use and read LCD control panel
7. High temperature, high pressure and anti-rotation shutdown
8. Energy efficient operation
9. 5 micron, water-resistant air filtration material
10. 2 year full machine warranty,5years air end warranty.
11. Supply the machine with different working voltage according to customer’s request, 
such as:
220Volt,single phase,60hz/50hz
220Volt,3 phase,60hz / 50hz
380Volt,3phase,50hz
440Volt,3phase,50hz
380Volt,3phase,60hz

We offer free pipe and valves for installation and installation diagram

Technical Specifications of screw air compressor
Model Air Flow (m³/min) Motor Power Noise Outlet Diameter Dimension Weight
7bar 8bar 10bar 13bar kw dB inch W*D*H  (mm) kg
YV-10A 1.1 1.0 0.85 0.7 7.5 65 G1” 960*680*960 280
YV-15A 1.8 1.65 1.5 1.3 11 65 G1” 1050*830*1240 380
YV-20A 2.4 2.2 2.1 1.8 15 68 G1” 1050*830*1240 380
YV-25A 3.1 3.0 2.7 2.3 18.5 68 G1” 1200*830*1290 480
YV-30A 3.8 3.6 3.2 2.5 22 68 G1” 1200*830*1290 480
YV-40A 5.3 5.0 4.3 3.6 30 69 G11/2” 1300*1000*1540 710
YV-50A 6.6 6.2 5.7 4.6 37 69 G11/2” 1300*1000*1540 710
YV-60A 8.0 7.7 6.9 6.0 45 70 G11/2” 1500*1160*1700 990
YV-75A 10.5 9.8 8.7 7.3 55 70 G11/2” 1500*1160*1700 990
YV-100A 13.6 13.0 11.3 10.1 75 72 G2” 1700*1180*1800 1300
YV-125A 16.2 15.4 13.2 11.2 90 72 DN50 1850*1200*1900 1400
YV-150A 20.8 19.5 16.5 13.7 110 73 DN65 2250*1260*2055 1560
Remarks:
1. working ambinent temperature: -5ºC-45ºC;
2. exhausting air temperature ≤  working ambinent temperature +10ºC-15ºC;
3. starting mode: Y-△;
4. exhausting oil content: <3ppm;
5. certificate:  CE/ISO9001/ASME;
6. voltage:  380V/220V/400V/440V/415V

Porduct detail photos of Y-air 11kw 15kw 30kw 37kw 8/10/13/16 bar Permanent Magnet Inverter Stationary  
Rotary  Screw Air Compressors

QC checking of Y-air 11kw 15kw 30kw 37kw 8/10/13/16 bar Permanent Magnet Inverter Stationary  Rotary  Screw Air Compressors
We do the check of every detail and spare parts of the industrial used frequency conversion varaible speed Medium Pressure Compressor. And we will test the industrial used frequency conversion varaible speed rotary screw air compressor for 48hours before package and shipment.

F.A.Q

Q1. Why do customers choose us?
Yunshun Electric Machinery Co., Ltd. is a company specializing in screw air compressor for 18 years since 2001. Our German Standard production line helps us get the affirmation from our agents as well as end-user clients.

Q2. Are you a manufacturer or trading company?
We are a professional manufacturer with big modern factory in HangZhou,China.
Both OEM & ODM service can be accepted.

Q3. What’s your delivery time?
Generally 7-10 days, if urgent order, we can arrange, too.

Q4. How long is your air compressor warranty?
2 year for the whole machine and 5years for screw air end, except consumable spare parts.

 Q5. How long could your air compressor be used for? 
At least 10 years.

Q6. What’s payment term?
T/T, L/C, Western Union, Credit Card, and etc.

Q7. How about your customer service?
24 hours on-line service for all our clients.

Q8. How about your after-sales service?
1. Providing customers with installation online instructions.
2. Well-trained engineers available to overseas service.
3. PlHangZhou for oversea after-sales supporting company.

 

Choosing the Right Air Compressor For Your Home

You will find that air compressors are indispensable tools for a variety of situations, including garages, home workshops, and basements. These tools can power a variety of tools, and each model is sized to suit the job at hand. Because air compressors have only 1 motor, they are lightweight, compact, and easy to handle. Using 1 air compressor to power several tools will also reduce the wear and tear on individual components. This article will introduce some important characteristics to look for when choosing the right air compressor for your home.

Positive displacement

A positive displacement compressor applies pressure to a fluid, whereas a centrifugal 1 does the opposite. A positive displacement compressor creates the desired pressure by trapping air and increasing its volume. Its discharge valve releases the high-pressure gas. These compressors are used in industrial applications and nuclear power plants. The difference between a positive and negative displacement compressor is that a positive displacement compressor can compress and release air at a consistent rate.
A positive displacement air compressor uses a reciprocating piston to compress air. This reduces the volume of the air in the compression chamber, and a discharge valve opens when the pressure reaches the desired level. These compressors are used in bicycle pumps and other pneumatic tools. Positive displacement air compressors have multiple inlet ports and have several configurations. Positive displacement air compressors have a single-acting and double-acting piston, and can be oil-lubricated or oil-free.
A positive displacement air compressor is different from a dynamic compressor. It draws air into the compression chambers and then releases the pressure when the valve is opened. Positive displacement compressors are common in industrial applications and are available in single-acting, double-acting, and oil-lubricated models. Large piston compressors have ventilated intermediate pieces and crossheads on gudgeon pins. Smaller models have permanently sealed crankcases with bearings.
air-compressor

Oil-free

Oil-free air compressors have some advantages over their oil-lubricated counterparts. They do not require lubrication oil because they are coated with Teflon. The material has 1 of the lowest coefficients of friction and is layered, so it slides past other layers with little effort. Because of this, oil-free compressors tend to be cheaper and still deliver comparable performance. Oil-free compressors are a good choice for industrial applications.
The life of an oil-free air compressor is significantly longer than an oil-lubricated counterpart. These models can operate up to 2,000 hours, 4 times longer than the average oil-lubed compressor. Oil-free compressors also have a significantly lower operating noise than their oil-lubricated counterparts. And because they don’t need oil changes, they are quieter. Some even last up to 2,000 hours.
An oil-free air compressor is a good choice if your application requires high levels of purity. Several applications require ultra-pure air, and even a drop of oil can cause product spoilage or damage to production equipment. In addition to the health risks, an oil-free air compressor reduces the costs associated with oil contamination and minimizes leaks. It also eliminates the need for oil collection, disposal, and treatment.
A typical oil-free air compressor is very efficient, requiring only about 18% of the full load horsepower. However, oil-free compressors have a higher risk of premature failure and are not recommended for large-scale industrial applications. They may also use up to 18% of the compressor’s full capacity. They may sound appealing, but you must make sure you understand the benefits of an oil-free air compressor before choosing 1 for your industrial applications.

Single-stage

A single-stage air compressor is designed to provide the power for a single pneumatic tool or device. These machines are generally smaller than two-stage compressors and produce less heat and energy. These machines aren’t designed for heavy-duty industries, but they are still highly effective for a variety of applications, including auto shops, gas stations, and various manufacturing plants. They can also be used in borewells, as they are suitable for small spaces with low air flow requirements.
A single-stage air compressor has 1 cylinder and 2 valves – the inlet and the delivery valves. Both of these valves function mechanically, with the inlet valve controlling torque and the delivery 1 controlling air pressure. Generally, single-stage compressors are powered by a gas engine, but there are also electric models available. The single-stage air compressor is the most common type of air compressor. It has a single cylinder, 1 piston, and 1 air cylinder.
The single-stage air compressors are used for small projects or personal use. A two-stage air compressor is more effective for industrial projects. Its longer air end life makes it more efficient. It is also more efficient for use in the automotive industry, where the engine has many cylinders. In general, single-stage compressors require a higher power level. The single-stage model is ideal for small projects, while a two-stage 1 is suitable for larger-scale arsenals.
air-compressor

CFM

The cubic foot-per-minute (CFM) of an air compressor is the output of the machine. In order to calculate the CFM level, start by looking at the compressor’s specifications. You should know how many cubic feet the unit can hold and how many pounds per square inch it can compress. Once you have these information, you can calculate the CFM. Now you can use these numbers to select an appropriate air compressor for your needs.
The most common way to increase the CFM of an air compressor is to turn the regulator down. By turning the dial down, the air compressor will produce more than 10 CFM. You can also try connecting 2 output valves. Make sure that the settings are adjusted properly before you begin. This will ensure that your air compressor is functioning at its maximum efficiency and lifespan. To increase the CFM of your air compressor, first check that your regulator is calibrated for the desired pressure level.
To calculate the CFM of an air compressor, first determine the tank volume of the machine. Then, multiply this volume by the time it takes to fill the tank. Then, divide the result by 60 seconds to calculate the CFM. Once you know how much air your machine can hold, you can choose a suitable air compressor. If you’re working in a confined area, you should buy a tool with a large tank.

PSI

The PSI of an air compressor is the pressure that it can output. A typical air compressor has a gauge connected to the airline at the bottom, next to it, or between the two. The gauge tells the actual pressure of the air compressor, while the cut-out pressure is determined by the manufacturer. The manufacturer recommends that you set the cut-out pressure 20 to 40 PSI higher than the factory recommended pressure. If you want to set the pressure for your nail gun, you can use the cut-in and cut-out pressures on your compressor, and the tank won’t exceed this range.
The PSI of an air compressor measures the force that it can deliver, which is often in pounds per square inch. For most air tools, you need at least 40 to 90 psi. In general, reciprocating air compressors work on an on/off basis. This relationship is known as the duty cycle. All air compressors are rated for a particular duty cycle, such as 50 percent on and 20-5 percent off.
The Psig of an air compressor is not free, as many people believe. The PSI of an air compressor is not free, but it is essential to maintain it for safe operations. If you’re having trouble maintaining a consistent pressure, consider turning down the PSI of your compressor by 2 psig. This will determine the critical pressure for the machine. You’ll also increase the amount of energy in the system by 1 percent.
air-compressor

Power source

The power source for an air compressor is crucial in its operation. Without the correct voltage and amperage, air compressors will not function properly. The power source must be close to the compressor so that it can plug into an electrical outlet. If it is too far from the outlet, the compressor may not be able to build enough pressure. When this happens, the fuse inside the air compressor will turn off to protect the user. The power source should be a safe distance from the compressor.
Most manufacturers do not specify the power source for an air compressor. Depending on the horsepower, the compressor will require approximately 4 amps of power. A one-horsepower compressor would draw about 12 amps. If it were powered by a typical 120-volt household supply, its motor would exceed the 15-amp breaker capacity. A larger air compressor, however, will require a separate 15-amp power source, making it impossible to use it with this type of power source.
The power source for an air compressor is typically electrical alternating current (AC) that is equivalent to the voltage on a standard wall outlet. A three-phase air compressor, on the other hand, requires a special AC supply with 3 electrical offset pulses. Regardless of the type of air compressor, the power source must be compatible with the incoming power service. One of the most common problems when attempting to connect an air compressor to an AC power source is undersized wire. This results in low voltage and high amperes, tripping of over-load relays and blown fuses.

China Standard 50% CZPT Saving 11kw 15kw 30kw 37kw 8/10/13/16 Bar Permanent Magnet Inverter Stationary Rotary Screw Air Compressors LG Compressor Screw Air Compressor     with Best SalesChina Standard 50% CZPT Saving 11kw 15kw 30kw 37kw 8/10/13/16 Bar Permanent Magnet Inverter Stationary Rotary Screw Air Compressors LG Compressor Screw Air Compressor     with Best Sales