Product Description

3.5bar -5bar low pressrue rotary screw air compressor for pet bottle blowing industry 

1. Company introduces & advtanges of ZheJiang Great AIr Compressor Manufacturing :
 

ZheJiang Great Air compressor Co., ltd, is 1 leading manufacture and exporter of air compressor in ZheJiang , China, Founded 1957 years, coving an area of 200000 square meters. Now exporting to more than 120 countries. Has established a huge sales and service network at home and abroad.

GREAT’ s main products range as blow:
-oil-injected rotary screw air compressor(fixed speed, variable speed; medium & low pressure)
-portable rotary screw air compressor(diesel powered, electric motor powered)
– low pressure screw air compressor
– outdoor screw air compressor 
– oil free screw blower(variable speed)
-oil free air compressor( scroll type, dry type, water lubricated type)
-air treatment equipment( air dryer, air tanker, filers etc.)

All of our machines are designed for high realiable performance, easy maintenance, and maximum energy efficiency. 

 

Our company advantages	1. Over 60 years China professsinal manufacture for air compressor ,An ISO9000 company
	2.European standard,China made &factory directly supply
	3. Superior porformance &high efficiency with reasonable price
	4.Low power consumptions for more output
	5.Trouble free & cost saving
	6.Timely pre-sale and after-sale service
	7.Easy operatation &maintenance

2. Products introductions &advantages for  low pressure screw air compressor 3.5-5bar :

 

Our products features	1.Approved by ISO9001/ SGS,/CE etc..
	2.Adopt the most advanced technology and world famous brand of twin screw main machine designing and  manufacturing, no leakage, ensure high air discharge and low energy consumption.
	3.  Adopt high quality electric motor with CZPT bearing, IP54, convenient maintenance and long use life.
	4. Adopt world famous brand of air intake filter, oil filter, air and oil separator, realize high filtration accuracy, compressed air oil content under 3ppm, reach to international advanced standard level.
	5. Equip with the most advanced air control system. Adopt air intake valve, intelligent control system and pressure sensor combined control method, can operate by ON and OFF 2 point, stepless air capacity control system, time-delay stop and automatically start device 3 air capacity control methods, can meet different clients demand.
	6.Intelligent microcomputer control system, Chinese and English language operation interface, malfunction display, alarm and machine stop automatically.
	7.Adopt high quality and world famous brand of main components, like UK APD oil filter, America AMOT temperature controlling valve, SCHNEIDER electric parts and etc., high efficiency, reliable and long use life.
	8. Equip with after air compression cooler combination with the air and water separator, compact structure and save space, avoid leakage and improve the air and water separating efficiency mostly.

Feature  for GREAT low pressure screw air compressor:
 

1) The exhaust pressure 3.5 ~ 5 bar low pressure screw air compressor products;

2) Regular air compressor running under low pressure, the biggest risk is the big fuel consumption and bad lubrication problem, our company through a specially designed successfully solved this 2 problems.

3) The biggest advantage of a low pressure machine is: on the premise of meet the user’s gas pressure, can with the lowest power consumption to achieve the biggest gas demand, to achieve energy saving!

By following a set of data, you can intuitive understanding that energy-saving features of the unit:

No.	Item	8bar machine	6bar machine	3.5bar machine
1	capacity	42.1(actually  test)	43.2(actually  test)	43.5(actually  test)
2	Unit input power	274kw	238kw	187.5kw
3	Power need for compressed each cubic air	6.5KW/m³/min	5.5KW/m³/min	4.3KW/m³/min
4	Electric saving per hour	86.5kw*h	50.5kw*h
5	Electric saving per 24hours	2076kw*h	1212kw*h
6	Electric saving cost per 8000 hours	USD$83879	USD$48970	Industrial electric cost$0.12/degree

Note: take 40 cubic meter for example, the same air end is tested at the same speed.

From the above table, it can be concluded that the operating 0.35 Mpa pressure gas equipment, and if using the air compressor of  pressure of 0.6-0.8Mpa, the user needs to increase the electricity cost by USD$45000 – $80000 per year. Therefore, in the low pressure gas industry, such as glass industry, textile industry, and foam plastics industry, considering the running cost,we should mainly recommend the low pressure screw air compressor 

3.Technical Parameters for  GREAT low pressure screw air compressor:
 

Model	Type	Flow air capacity (m3/min)	Working pressure (Bar)	Noise (dBa)	Power (Kw)	Outlet pipe size	Dimensions (mm)	Weight (Kg)
LG(F)D-90-d	LG(F)D-18.7/3.5	25	3.5		90	DN80	2450*1800*1820	3225
	LG(F)D-17.9/4.0	24	4
	LG(F)D-17.3/4.5	22	4.5
	LG(F)D-15.8/5.0	20	5
LG(F)D-110-d	LG(F)D-24.1/3.5	30	3.5	78±3	110	DN80	3150*2050*2210	4050
	LG(F)D-22.1/4.0	28	4
	LG(F)D-21.8/4.5	26	4.5
	LG(F)D-20.9/5.0	23	5
LG(F)D-132-d	LG(F)D-30.2/3.5	35	3.5		132	DN80	3150*2050*2210	4050
	LG(F)D-27.6/4.0	33	4
	LG(F)D-25.7/4.5	30	4.5
	LG(F)D-24.0/5.0	29	5
LG(F)D-160-d	LG(F)D-33.7/3.5	41.7	3.5		160	DN125	3150*2050*2210	5500
	LG(F)D-30.5/4.0	38	4
	LG(F)D-30.0/4.5	36	4.5
	LG(F)D-29.6/5.0	33	5
LG(F)D-185-d	LG(F)D-41.0/3.5	46	3.5	80±3	185	DN125	3750*2120*2340	7000
	LG(F)D-39.0/4.0	45	4
	LG(F)D-36.0/4.5	41	4.5
	LG(F)D-35.8/5.0	40	5
LG(F)D-200-d	LG(F)D-43.3/3.5	48	3.5		200	DN125	3850*2120*2340	7000
	LG(F)D-41.0/4.0	46	4
	LG(F)D-40.5/4.5	45	4.5
	LG(F)D-38.7/5.0	41	5
LG(F)D-220-d	LG(F)D-47.0/3.5	50	3.5	80±3	220	DN150	3850*2120*2340	7000
	LG(F)D-43.2/4.0	48	4
	LG(F)D-42.5/4.5	46	4.5
	LG(F)D-40.4/5.0	45	5

 

4.Application :

6.Certification :

7. FAQ : 
Q1: Are you factory or trade company?  
A1: We are factory.
Q2: Warranty terms of your machine? 
A2: One year warranty for the machine and technical support according to your needs.
Q3: Will you provide some spare parts of the machines? 
A3: Yes, of course.
Q4: How long will you take to arrange production? 
A4: 380V 50HZ we can delivery the goods within 20 days. Other electricity or other color we will delivery within 30 days.
Q5: Can you accept OEM orders? 
A5: Yes, with professional design team, OEM orders are highly welcome!

8. Contact :
 

sales engineer	Celia Meng
Website	http://greataircompressor

 

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.

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.

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.

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.