Tag Archives: used ac compressor

China Oilless High Pressure Rotary Portable Mini Industrial Used Movable Single Max Dental AC Oil Screw Part Parts Piston Free Air Pump Compressor wholesaler

Merchandise Description

Item Description
Attributes
1. Comprehensive variety and sequence:
The .5 ~ .7MPA sequence developed by modern day principles to the rehabilitation air compressor is utilised to collect new technological achievements of micro -little air compressors domestic and overseas.

two. Specialized agglomeration, comprehensive overall performance of equipment:

The optimized layout of the air valve can efficiently decrease exhaust resistance and exhaust temperature, and enhance the exhaust quantity. Layout a realistic aluminum cylinder head, substantial warmth dissipation CZPT to achieve rapid warmth dissipation, effectively decrease exhaust temperature, and lessen strength use. Use consumption dumplings or exhaust load unloading products to efficiently minimize power usage.
Oil strikes are utilised to strike oil to type splashing oil fog, lubricating bearing tiles and bearing, and trustworthy procedure.
3.Shut to the genuine wants of end users:The complete sequence of goods, the exhaust volume has been from small to massive, which meets the needs of air mechanical and gasoline these kinds of as air -drifting devices this sort of as pneumatic rock drills. There are various constructions, suited for distinct customers. Low -good quality, minimal investment decision fees.

Item specs series parameters

Model HV-4./five HS-4.5/6 HS-4.5/6C

Item

Engine displacement m/min 4 four.5 four.five
Discharge force Mpa .five .6 .six
Crankshaft speedr/min 970 980 980
Cylinders×cylinder diameter 
z×mm
4×120 4×120 4×120
Piston stroke mm a hundred 112 112
Volume of fuel storage tank L 230 200 230
Supporting determination L32diesel engine or
18.5kW,2pole motor
25kW,
6pole motor
QC490G
35kW
diesel engine
Stress handle manner Inlet Shut
 
Inlet Near
 
Inlet Close
 
Lubricating method splashing Oil pump compelled force
And oil strike splash
Elastic sleeve pin coupling right related
Cooling manner Air cooling Air cooling Air cooling
Driving method Clutch, triangular belt Elastic sleeve pin coupling right connected Clutch, reducer Elastic sleeve pin coupling
Dimension(mm) 1900×1070×1260 1460×924×1210 2030×945×1560
Total excess weight(kg)
diesel engine
580 630
Whole bodyweight(kg)
eclectic engine
540 550

 

Model 2V-4./5C 2V-4./5P 2V-4./5

Merchandise

Engine displacement m/min four 4 four
Discharge stress Mpa .5 .5 .five
Crankshaft speedr/min 980 980 980
Cylinders×cylinder diameter 
z×mm
4×125 4×125 4×125
Piston stroke mm a hundred a hundred 100
Volume of fuel storage tank L 230 230 230
Supporting enthusiasm QC490G
35kW
Four-cylinder diesel engine
HS400
27kW One-cylinder diesel motor
22kW,
6pole motor
Stress management manner Inlet Near
 
Inlet Shut
 
Inlet Near
 
Lubricating method splashing splashing splashing
Cooling mode Air cooling Air cooling Air cooling
Driving mode Clutch, reducer Elastic sleeve pin coupling Clutch, triangular belt Elastic sleeve pin coupling immediately related
Dimension(mm) 2120×895×1560 2100×945×1285 1900×930×1235
Whole excess weight(kg)
diesel motor
680 492 680
Overall fat(kg)
eclectic engine
    580

 

 

 

US $120-18,000
/ Set
|
1 Set

(Min. Order)

###

After-sales Service: Online
Lubrication Style: Oil-free
Cooling System: Air Cooling
Power Source: AC Power
Cylinder Position: Horizontal
Structure Type: Closed Type

###

Customization:

###

Model HV-4.0/5 HS-4.5/6 HS-4.5/6C

Item

Engine displacement m/min 4 4.5 4.5
Discharge pressure Mpa 0.5 0.6 0.6
Crankshaft speedr/min 970 980 980
Cylinders×cylinder diameter 
z×mm
4×120 4×120 4×120
Piston stroke mm 100 112 112
Volume of gas storage tank L 230 200 230
Supporting motivation L32diesel engine or
18.5kW,2pole motor
25kW,
6pole motor
QC490G
35kW
diesel engine
Pressure control mode Inlet Close
 
Inlet Close
 
Inlet Close
 
Lubricating mode splashing Oil pump forced pressure
And oil strike splash
Elastic sleeve pin coupling directly connected
Cooling mode Air cooling Air cooling Air cooling
Driving mode Clutch, triangular belt Elastic sleeve pin coupling directly connected Clutch, reducer Elastic sleeve pin coupling
Dimension(mm) 1900×1070×1260 1460×924×1210 2030×945×1560
Total weight(kg)
diesel engine
580 630
Total weight(kg)
eclectic engine
540 550

###

Model 2V-4.0/5C 2V-4.0/5P 2V-4.0/5

Item

Engine displacement m/min 4 4 4
Discharge pressure Mpa 0.5 0.5 0.5
Crankshaft speedr/min 980 980 980
Cylinders×cylinder diameter 
z×mm
4×125 4×125 4×125
Piston stroke mm 100 100 100
Volume of gas storage tank L 230 230 230
Supporting motivation QC490G
35kW
Four-cylinder diesel engine
HS400
27kW Single-cylinder diesel engine
22kW,
6pole motor
Pressure control mode Inlet Close
 
Inlet Close
 
Inlet Close
 
Lubricating mode splashing splashing splashing
Cooling mode Air cooling Air cooling Air cooling
Driving mode Clutch, reducer Elastic sleeve pin coupling Clutch, triangular belt Elastic sleeve pin coupling directly connected
Dimension(mm) 2120×895×1560 2100×945×1285 1900×930×1235
Total weight(kg)
diesel engine
680 492 680
Total weight(kg)
eclectic engine
    580
US $120-18,000
/ Set
|
1 Set

(Min. Order)

###

After-sales Service: Online
Lubrication Style: Oil-free
Cooling System: Air Cooling
Power Source: AC Power
Cylinder Position: Horizontal
Structure Type: Closed Type

###

Customization:

###

Model HV-4.0/5 HS-4.5/6 HS-4.5/6C

Item

Engine displacement m/min 4 4.5 4.5
Discharge pressure Mpa 0.5 0.6 0.6
Crankshaft speedr/min 970 980 980
Cylinders×cylinder diameter 
z×mm
4×120 4×120 4×120
Piston stroke mm 100 112 112
Volume of gas storage tank L 230 200 230
Supporting motivation L32diesel engine or
18.5kW,2pole motor
25kW,
6pole motor
QC490G
35kW
diesel engine
Pressure control mode Inlet Close
 
Inlet Close
 
Inlet Close
 
Lubricating mode splashing Oil pump forced pressure
And oil strike splash
Elastic sleeve pin coupling directly connected
Cooling mode Air cooling Air cooling Air cooling
Driving mode Clutch, triangular belt Elastic sleeve pin coupling directly connected Clutch, reducer Elastic sleeve pin coupling
Dimension(mm) 1900×1070×1260 1460×924×1210 2030×945×1560
Total weight(kg)
diesel engine
580 630
Total weight(kg)
eclectic engine
540 550

###

Model 2V-4.0/5C 2V-4.0/5P 2V-4.0/5

Item

Engine displacement m/min 4 4 4
Discharge pressure Mpa 0.5 0.5 0.5
Crankshaft speedr/min 980 980 980
Cylinders×cylinder diameter 
z×mm
4×125 4×125 4×125
Piston stroke mm 100 100 100
Volume of gas storage tank L 230 230 230
Supporting motivation QC490G
35kW
Four-cylinder diesel engine
HS400
27kW Single-cylinder diesel engine
22kW,
6pole motor
Pressure control mode Inlet Close
 
Inlet Close
 
Inlet Close
 
Lubricating mode splashing splashing splashing
Cooling mode Air cooling Air cooling Air cooling
Driving mode Clutch, reducer Elastic sleeve pin coupling Clutch, triangular belt Elastic sleeve pin coupling directly connected
Dimension(mm) 2120×895×1560 2100×945×1285 1900×930×1235
Total weight(kg)
diesel engine
680 492 680
Total weight(kg)
eclectic engine
    580

How to Choose the Right Air Compressor

An air compressor uses pressurized air to power a variety of tools. They are most commonly used to power nailers and impact wrenches. Other popular uses for air compressors include paint sprayers and impact wrenches. While all air compressors have the same basic construction, their specialty differs. Ultimately, their differences come down to the amount of air they can push. Read on for information on each type of air compressor. These tools are great for many different purposes, and choosing the right air compressor depends on your specific needs.
air-compressor

Electric motor

While purchasing an electric motor for air compressor, compatibility is a key factor. Not all motors work with the same type of air compressor, so it’s important to check the manufacturer’s instructions before purchasing. By doing this, you can avoid wasting money on an incompatible motor. Another important consideration is speed. A motor’s speed is its rate of rotation, measured in revolutions per minute. It is critical that you purchase a motor with sufficient speed to meet the needs of your air compressor.
Typically, an electric motor for air compressor is 1.5 hp. It is ideal for use with medical equipment and metal-cutting machines. It also performs well under continuous operation and offers a high efficiency and energy-saving performance. Moreover, it features an attractive price, making it a good choice for a wide range of applications. If you are looking for a motor for an air compressor, look no further than a ZYS series.
A motor’s protection class indicates how the motor will operate. Protection classes are specified by the IEC 60034-5. These are stated with two digits and represent the protection against solid objects and water. For example, an IP23 rating means that the motor will be protected from solid objects, while IP54 means that it will protect from dust and water sprayed from all directions. It is vital to choose a motor with the correct protection class for your air compressor.
When choosing an electric motor, you should consider whether it’s compatible with the brand of air compressor. Some may be compatible, while others may require advanced electronics skills to repair. However, most air compressors are covered by warranty, so it’s important to check with the manufacturer if the warranty is still in effect before you spend a dime on a replacement. The motor should be replaced if it has failed to perform as designed.
air-compressor

Oil bath

Air compressors require proper lubrication to function efficiently. The piston must draw air with minimal friction. Depending on their design, air compressors can either be oil-lubricated or oil-free. The former uses oil to reduce piston friction, while the latter splashes it on the cylinder bearings and walls. Such air compressors are commonly known as oil-flooded air compressors. In order to keep their oil baths clean, they are recommended for use in locations with high dust levels.

Start/stop control

An air compressor can be controlled by a start/stop control. This type of control sends a signal to the main motor that activates the compressor when the demand for air falls below a preset limit. This control strategy is effective for smaller air compressors and can be useful for reducing energy costs. Start/stop control is most effective in applications where air pressure does not change frequently and where the compressor is not required to run continuously.
To troubleshoot this problem, you need to check the power supply of your compressor. To check the supply side, use a voltage monitor to determine if power is flowing to the compressor. Ensure that the power supply to the compressor is steady and stable at all times. If it fluctuates, the compressor may not start or stop as expected. If you cannot find the problem with the air compressor power supply, it may be time to replace it.
In addition to the start/stop control, you may want to purchase additional air receivers for your air compressor. These can increase the capacity of air stored and reduce the number of times it starts and stops. Another way to decrease the number of starts per hour is to add more air receivers. Then, you can adjust the control to match your requirements. You can also install a pressure gauge that monitors the compressor’s performance.
Start/stop control for air compressors can be complex, but the basic components are relatively easy to understand. One way to test them is to turn the compressor on or off. It is usually located on the exterior of the motor. If you’re unsure of the location of these components, check the capacitors and make sure that the air compressor is not running while you’re not using it. If it does, try to remove the capacitor.
Variable displacement control is another way to adjust the amount of air flowing into the compressor. By controlling the amount of air, the control can delay the use of additional compressors until more required air is available. In addition to this, the device can also monitor the energy used in the compressor. This control method can result in substantial energy savings. You can even save on the amount of electricity by using variable displacement control. It is essential for efficient compressed air systems.
air-compressor

Variable speed drive

A VFD, or variable frequency drive, is a type of electric motor that adjusts its speed to match the demand for air. It is an efficient way to reduce energy costs and improve system reliability. In fact, studies have shown that a 20% reduction in motor speed can save up to 50% of energy. In addition, a VFD can monitor additional variables such as compressor oil pressure and motor temperature. By eliminating manual checks, a VFD will improve the performance of the application and reduce operating costs.
In addition to reducing energy costs, variable-speed drives also increase productivity. A variable-speed air compressor reduces the risk of system leaks by 30 percent. It also reduces the risk of system leaks by reducing pressure in the system. Because of these advantages, many governments are promoting this technology in their industries. Many even offer incentives to help companies upgrade to variable-speed drives. Therefore, the variable-speed drive can benefit many air compressor installations.
One major benefit of a variable-speed drive is its ability to optimize energy use. Variable frequency drives are able to ramp up and down to match the demand for air. The goal is to optimize the pressure and flow in the system so that the best “dead band” occurs between forty percent and eighty percent of full load. A variable-speed compressor will also increase energy efficiency because of its programmability.
A variable-speed air compressor can also be used to control the amount of air that is compressed by the system. This feature adjusts the frequency of power supplied to the motor based on the demand. If the demand for air is low, the frequency of the motor will reduce to save energy. On the other hand, if there is an excess demand for air, the variable-speed compressor will increase its speed. In addition, this type of air compressor is more efficient than its fixed-speed counterpart.
A VFD has many benefits for compressed air systems. First, it helps stabilize the pressure in the pipe network, thereby reducing the power losses due to upstream pressure. It also helps reduce the power consumption caused by fluctuations in upward pressure. Its benefits are also far-reaching. And as long as the air pressure and air supply is properly sized, a VFD will help optimize the efficiency of compressed air systems.

China Oilless High Pressure Rotary Portable Mini Industrial Used Movable Single Max Dental AC Oil Screw Part Parts Piston Free Air Pump Compressor     wholesaler China Oilless High Pressure Rotary Portable Mini Industrial Used Movable Single Max Dental AC Oil Screw Part Parts Piston Free Air Pump Compressor     wholesaler
editor by czh 2022-12-26

China OEM Mini Used Industrial Portable Parts High Pressure Hot Screw Oilless Part Free Rotary AC Oil Single Movable Max Dental Piston Air Pump Compressor with Free Design Custom

Merchandise Description

Scoep of software:
Using for Pushing Pneumatic Nail Gun, Air Screw , Spray Painting Gun to work, also use to miniature instrument, blowing dust, Air inflation for little auto and so on.
Product  Function:

  1. Higher Electrical power, large performance, lower energy, high reliability.
  2. Piston Ring: New ECO circle, low friction coefficient, Auto lubricating method.
  3. Cylinder Liner: Surface hardening, deplete hardness, Speed up the warmth transfer, prolonged utilizing time.
  4. Suction and exhaust valve: Using sophisticated foreign technological innovation.
  5. Numerous Strain: Overload protection

 

 

 

 

    

 Oilless Air Compressor Featuers:
1.Tremendous Silent
Tremendous minimal sound.The output air strain is stable without having fluctuations, decreasing noise air pollution.
   
     2. Basic safety
 
If the voltage or recent result in the device  overheat, it will immediately shut down to defend  from burnout.
 
    3. Computerized management

 Pressure change routinely controls the commence and quit of the equipment.
   
   4. Adjustable air pressure
The air force can be altered to fulfill the requirements of different equipment usage.

   5. Preserve human power
 
Switch on the air compressor can work generally & automatically. It is effortless to run and does not need to have human to be on obligation.
 
 6. Easy maintenance
No need to have to incorporate any lubricant, straightforward routine maintenance after buy. 

Parts Features
1.Heavy solid iron human body: heavy load, lengthy stroke, lower gasoline use, minimal sounds

2.Cylinder: manufactured of high-quality forged iron, strength, good lubricity, wall by the good honing, put on-resistant, sturdy

three.Piston ring: good elasticity, excellent dress in resistance, lower oil usage, not effortless to make the valve team carbon deposition and decline of oil to burn the crankshaft and connecting rod.

4.The crankshaft, connecting rod, piston: properly well balanced, dress in resistance, substantial toughness, clean running equilibrium.

five.High dependable and durable valve robust aluminum alloy entire body, gentle and heat.

6.The motor offers trustworthy energy, reduced voltage start up and running functionality powerful supporter cooled motor and body special shock evidence layout.

7.Double nozzles, ended up utilised to direct the exhaust and force exhaust stress swap with drive button, safe and convenient

8.Oil cost-free,silent,safeguard-environment,suitable for dental use.
 

Frequency Requested Question

one.Are you the producer or buying and selling organization?
We are the company.

two.Where is your manufacturing facility?
It is situated in HangZhou City,ZHangZhoug Province,China.

3.What is the terms of trade?
FOB,CFR,CIF or EXW are all satisfactory.

four.What is the terms of payment?
T/T,L/C at sight or funds.

5.What is actually the direct time?

In fifteen days on receipt of deposit .

6.Do you accept sample order?
Of course,we acknowledge.

seven.What about the price of sample?
 You have to shell out the freight charge.But the cost of solution could be refundable,if you will acquire 1x20GP container in the potential.

 

Picking the Proper Air Compressor For Your Home

You will uncover that air compressors are indispensable resources for a range of circumstances, which includes garages, home workshops, and basements. These instruments can energy a variety of resources, and every design is sized to match the task at hand. Because air compressors have only 1 motor, they are light-weight, compact, and effortless to deal with. Using 1 air compressor to energy numerous instruments will also lessen the dress in and tear on person parts. This write-up will introduce some important qualities to search for when choosing the appropriate air compressor for your property.

Positive displacement

A optimistic displacement compressor applies strain to a fluid, whilst a centrifugal one particular does the reverse. A constructive displacement compressor results in the preferred force by trapping air and growing its quantity. Its discharge valve releases the higher-force gas. These compressors are utilised in industrial applications and nuclear electricity plants. The variation in between a good and damaging displacement compressor is that a constructive displacement compressor can compress and launch air at a consistent rate.
A good displacement air compressor makes use of a reciprocating piston to compress air. This reduces the volume of the air in the compression chamber, and a discharge valve opens when the stress reaches the preferred stage. These compressors are used in bicycle pumps and other pneumatic tools. Constructive displacement air compressors have multiple inlet ports and have a number of configurations. Constructive displacement air compressors have a single-acting and double-acting piston, and can be oil-lubricated or oil-free of charge.
A good displacement air compressor is various from a dynamic compressor. It attracts air into the compression chambers and then releases the strain when the valve is opened. Positive displacement compressors are common in industrial apps and are accessible in one-performing, double-acting, and oil-lubricated versions. Massive piston compressors have ventilated intermediate parts and crossheads on gudgeon pins. More compact types have permanently sealed crankcases with bearings.
air-compressor

Oil-free of charge

Oil-free of charge air compressors have some positive aspects in excess of their oil-lubricated counterparts. They do not demand lubrication oil due to the fact they are coated with Teflon. The material has one of the lowest coefficients of friction and is layered, so it slides earlier other layers with small energy. Due to the fact of this, oil-free of charge compressors are inclined to be more affordable and even now provide similar efficiency. Oil-totally free compressors are a good choice for industrial purposes.
The daily life of an oil-free air compressor is substantially lengthier than an oil-lubricated counterpart. These models can operate up to 2,000 hrs, four moments for a longer time than the typical oil-lubed compressor. Oil-free of charge compressors also have a substantially lower functioning sounds than their oil-lubricated counterparts. And simply because they never require oil adjustments, they are quieter. Some even previous up to 2,000 several hours.
An oil-free air compressor is a good decision if your application needs higher levels of purity. Many programs require extremely-pure air, and even a drop of oil can cause product spoilage or injury to generation equipment. In addition to the wellness hazards, an oil-free of charge air compressor lowers the fees linked with oil contamination and minimizes leaks. It also eradicates the need for oil assortment, disposal, and remedy.
A standard oil-free of charge air compressor is extremely efficient, demanding only about 18% of the entire load horsepower. However, oil-free of charge compressors have a larger risk of premature failure and are not advised for huge-scale industrial applications. They could also use up to 18% of the compressor’s entire potential. They could audio appealing, but you need to make sure you comprehend the positive aspects of an oil-cost-free air compressor just before selecting one for your industrial apps.

Solitary-phase

A solitary-stage air compressor is made to give the electrical power for a single pneumatic resource or device. These devices are typically smaller sized than two-stage compressors and produce significantly less heat and strength. These devices usually are not designed for large-responsibility industries, but they are even now very effective for a range of apps, like vehicle retailers, fuel stations, and various producing plants. They can also be utilised in borewells, as they are suited for little areas with minimal air movement requirements.
A one-phase air compressor has a single cylinder and two valves – the inlet and the delivery valves. Each of these valves operate mechanically, with the inlet valve controlling torque and the shipping and delivery a single managing air strain. Generally, solitary-phase compressors are powered by a fuel motor, but there are also electrical designs available. The one-stage air compressor is the most typical sort of air compressor. It has a single cylinder, one particular piston, and 1 air cylinder.
The single-stage air compressors are utilised for modest initiatives or private use. A two-phase air compressor is a lot more effective for industrial assignments. Its lengthier air conclude existence can make it more productive. It is also much more successful for use in the automotive industry, where the engine has several cylinders. In common, solitary-stage compressors call for a greater electricity amount. The solitary-stage model is excellent for small initiatives, whilst a two-phase one particular is suited for bigger-scale arsenals.
air-compressor

CFM

The cubic foot-per-minute (CFM) of an air compressor is the output of the machine. In buy to estimate the CFM stage, start by looking at the compressor’s specs. You ought to know how many cubic ft the device can hold and how several lbs . per square inch it can compress. When you have these data, you can determine the CFM. Now you can use these numbers to decide on an appropriate air compressor for your wants.
The most typical way to improve the CFM of an air compressor is to flip the regulator down. By turning the dial down, the air compressor will generate a lot more than ten CFM. You can also try connecting two output valves. Make positive that the configurations are adjusted properly ahead of you commence. This will guarantee that your air compressor is functioning at its maximum efficiency and lifespan. To increase the CFM of your air compressor, 1st examine that your regulator is calibrated for the desired pressure level.
To estimate the CFM of an air compressor, 1st establish the tank quantity of the equipment. Then, multiply this quantity by the time it requires to fill the tank. Then, divide the outcome by 60 seconds to estimate the CFM. When you know how considerably air your machine can keep, you can pick a appropriate air compressor. If you happen to be operating in a confined region, you must acquire a instrument with a large tank.

PSI

The PSI of an air compressor is the stress that it can output. A standard air compressor has a gauge related to the airline at the base, following to it, or amongst the two. The gauge tells the true pressure of the air compressor, whilst the lower-out strain is determined by the company. The maker suggests that you set the lower-out strain twenty to forty PSI larger than the manufacturing unit recommended force. If you want to established the force for your nail gun, you can use the minimize-in and lower-out pressures on your compressor, and the tank is not going to exceed this range.
The PSI of an air compressor steps the power that it can deliver, which is frequently in pounds per square inch. For most air equipment, you need at least forty to 90 psi. In general, reciprocating air compressors work on an on/off basis. This partnership is recognized as the responsibility cycle. All air compressors are rated for a particular obligation cycle, this kind of as fifty percent on and 20-5 percent off.
The Psig of an air compressor is not cost-free, as many individuals believe. The PSI of an air compressor is not cost-free, but it is essential to sustain it for secure functions. If you are obtaining problems sustaining a steady stress, take into account turning down the PSI of your compressor by 2 psig. This will decide the crucial pressure for the device. You may also boost the volume of power in the system by one per cent.
air-compressor

Electrical power supply

The electrical power source for an air compressor is critical in its procedure. With out the correct voltage and amperage, air compressors will not perform correctly. The electricity supply must be close to the compressor so that it can plug into an electrical outlet. If it is way too far from the outlet, the compressor may possibly not be able to create adequate force. When this happens, the fuse within the air compressor will change off to shield the user. The energy supply must be a risk-free distance from the compressor.
Most manufacturers do not specify the energy supply for an air compressor. Dependent on the horsepower, the compressor will demand roughly four amps of electrical power. A a single-horsepower compressor would draw about twelve amps. If it have been driven by a common 120-volt household provide, its motor would exceed the 15-amp breaker capability. A bigger air compressor, nevertheless, will demand a different 15-amp electricity source, making it unattainable to use it with this variety of energy source.
The electrical power source for an air compressor is normally electrical alternating existing (AC) that is equal to the voltage on a regular wall outlet. A a few-section air compressor, on the other hand, demands a specific AC provide with 3 electrical offset pulses. No matter of the variety of air compressor, the energy resource must be appropriate with the incoming energy service. 1 of the most typical problems when making an attempt to link an air compressor to an AC electrical power supply is undersized wire. This outcomes in lower voltage and substantial amperes, tripping of above-load relays and blown fuses.

China OEM Mini Used Industrial Portable Parts High Pressure Hot Screw Oilless Part Free Rotary AC Oil Single Movable Max Dental Piston Air Pump Compressor     with Free Design CustomChina OEM Mini Used Industrial Portable Parts High Pressure Hot Screw Oilless Part Free Rotary AC Oil Single Movable Max Dental Piston Air Pump Compressor     with Free Design Custom