Low Pressure Screw Air Compressor

Low-pressure screw air compressor has low noise, low vibration and high reliability. Two-stage compression reduces the compression ratio of each stage, reduces internal leakage, improves volumetric efficiency, reduces bearing load, and extends the life of the main engine. The highly efficient oil and gas separation system adopts a three-stage separation method (cyclone separation method, sedimentation separation method, fine filtration method) to make the oil content of the outlet compressed air only 2ppm. Compared with single-stage compression, two-stage compression tends to be a power-saving isothermal compression. In principle, two-stage compression saves 5%-8% more energy than single-stage compression. The use of a two-stage compression host uses two sets of screw rotors with inconsistent sizes to achieve reasonable pressure distribution and reduce the compression ratio of each pressure stage: a. Reduce internal leakage and improve volumetric efficiency. b. Reduce the load on the bearings, increase the life of the bearings, and extend the life of the main engine. Low-noise design uses large-diameter, low-speed low-noise fans to provide large air volume while effectively reducing fan noise. Fully enclosed silent design

1. Screw host:

The exhaust end of the main engine uses a pair of tapered roller bearings to bear uniform loads through line contact, which greatly extends the life of the main engine. And use skf high-grade bearings. The coolant storage tank designed at the main engine bearing avoids dry friction at startup and further extends the life of the bearing. The main engine adopts three mechanical seals, and a shaft seal with an oil hole is designed at the shaft extension, which 100% prevents lubricating oil leakage. 1:1 without speed-increasing ratio gear, the lower speed of the machine head reduces the wear of the main engine, reduces the noise of the air compressor, and more effectively extends the service life of the main engine.
2. Coupling:

​The elastic coupling using high-tech composite materials reduces vibration, noise, and wear, and makes up for the error between couplings.
3. First-class energy efficiency motor:

The high-efficiency 380v energy-saving motors used in the two-stage compression screw air compressor are high-performance motors specially configured for the compressor. The motor bearings are all imported bearings, with an insulation grade of F and a service life of up to 300,000 hours.
4. Unique noise reduction design concept:

Each main component of the low-pressure screw air compressor unit is equipped with a vibration-isolating pad connection, which greatly absorbs vibrations during startup, shutdown, and operation. It is also equipped with a standard sound-insulating hood, which ensures that the unit's noise is reduced during operation. to lower, giving greater flexibility when choosing how to place the air compressor.

5.They are generally made of aluminum casing, which is reliable and sturdy.

6.It operates with less or no oil, and the output air is clean, which can improve energy utilization.

7.Maintenance-free use, its wearing parts are only two bearings, and it can be used maintenance-free during the warranty period.

8. Compared with centrifugal fans, their pressure is much higher, often more than ten times that of centrifugal fans.

9. The mechanical wear is very small because there are no other mechanical contact parts except the bearings, so the service life is long.

10.Low noise and motor-type integrated silencer equipment.

Model	(KW/HP) Power	Exhaust pressure (MPa)	exhaust volume (m3/min)	Dimensions(mm) Size(LXWXH)	Connection size Inch	net weight (kg)
U45PM-2S	45	0.6	11.84	2200*1230*1700	G2"	1350
		0.7	11.42
		0.8	10.54
		1.0	9.38
U55PM-2S	55	0.6	14.26	2200*1320*1700	G2"	1550
		0.7	13.78
		0.8	11.69
		1.0	11.73
U75PM-2S	75	0.6	20.27	2200*1430*1700	DN80	2100
		0.7	18.92
		0.8	17.70
		1.0	14.24
U90PM-2S	90	0.6	23.67	2700*1650*1850	DN80	2700
		0.7	22.46
		0.8	21.50
		1.0	19.38
U110PM-2S	110	0.6	26.77	2700*1650*1850	DN80	2900
		0.7	26.60
		0.8	25.27
		1.0	21.37
U132PM-2S	132	0.6	32.26	3410*1620*1960	DN100	4200
		0.7	30.38
		0.8	29.06
		1.0	25.80
U160PM-2S	160	0.6	39.15	3910*1610*1920	DN100	4345
		0.7	37.10
		0.8	35.60
		1.0	32.20
U185PM-2S	185	0.6	39.64	3510*1910*2010	DN125	4800
		0.7	39.43
		0.8	39.30
		1.0	38.59
U200PM-2S	200	0.6	46.20	3510*1910*2010	DN125	6500
		0.7	43.56
		0.8	42.13
		1.0	36.28
U250PM-2S	250	0.6	/	4210*2110*2210	DN125	7500
		0.7	55.60
		0.8	53.50
		1.0	45.20
U315PM-2S	315	0.6	/	4210*2110*2210	DN125	8200
		0.7	69.10
		0.8	66.20
		1.0	60.20
U355PM-2S	355	0.6	/	4210*2110*2210	DN125	8500
		0.7	76.95
		0.8	74.80
		1.0	66.20

 

Introduction to low-pressure screw air compressor accessories

 

1. The high-efficiency aluminum plate-fin heat exchanger is designed with a maximum temperature of 230°C.

2. Strong permeability, good heat transfer performance, improved "temperature and pressure" to reduce energy consumption.

2. The unique fin structure increases the secondary heat exchange area, promotes turbulence, and improves the heat transfer coefficient.

3. The heat exchange area is 30% larger than the standard in the same industry, with a large margin, which improves the heat transfer coefficient and achieves the optimal cooling effect.

4. Achieve the best state of the cooling and lubrication system

5. Easy to clean.

6. Designed to reduce the temperature of super coolant, which can optimize the operating status of vacuum pump components and extend the life of the machine.

7. Efficient cooling capacity to improve operating efficiency

8. Adequate redundant design allows the system to operate normally at the maximum ambient temperature of 43°C

9. Use a temperature control valve to control the temperature of the lubricating oil entering the main engine.

1. Integrated functions of temperature control valve and oil filter seat

2. Ensure the smooth flow of super coolant inside the system

3. The temperature control valve controls the temperature of the exhaust system within a suitable range.

4. Control the oil temperature to not be lower than the ambient temperature +40°C to prevent water vapor in the oil-gas mixture from escaping and causing emulsification of the coolant.

5. The temperature sensing element automatically controls the proportion of coolant entering the cooler and bypassing according to the exhaust temperature to achieve the purpose of temperature control.

6. Keep the temperature of the coolant in the optimal range and extend the service life of the coolant.

7. Easy to install and maintain

8. Simplify pipelines, reduce joints, and reduce pressure loss and oil and gas leakage probability

Two-stage dust removal, diversion swirling and filter card slot design. Ordinary air filter accuracy: 3um

Heavy-duty nano air filter precision: 1um, and suitable for heavy dust environments

1. Eliminate the traditional PLC control scheme and have built-in dual PID control for pressure and temperature, making the control more intelligent.

2. High-performance air compressor-specific touch screen, high-end image, sensitive touch response, adaptive vacuum pump control program, easy to operate.

3. Advanced vector control algorithm optimizes product adaptability while adjusting the best performance output to improve system operation reliability; the frequency converter is compatible with permanent magnet motor control.

4. Reliability and safety protection: For various harsh application situations of vacuum pumps, it provides a high overload service coefficient, configures EMC filters, and sets up a variety of early warning and protection functions to reduce the probability of failure during user use.

1. All models use IE4 level (GB1 energy efficiency) ultra-efficient motors;

2. IP55 protection level.

3. The motor windings and magnets are in a closed and clean space to avoid contamination and demagnetization;

4. All motors adopt SmCo magnet design, with higher demagnetization temperature and more reliable product quality.

5. All motors have winding temperature sensors to monitor the internal temperature of the motor in real time, with high temperature warning and trip protection.

 

Screw compressors are the core equipment of modern industrial production and are widely used in petrochemical, coal chemical, natural gas, metallurgical, electric power, machinery manufacturing and defense industries. In addition, the demand for screw compressors in the medical, textile, food, agriculture, transportation and other sectors is also increasing day by day. The screw compressor can provide power source for pneumatic equipment, and can also be used to increase gas pressure or transport gas. Especially in petroleum and chemical production, the screw compressor is an indispensable key equipment. Various gases pass through the screw compressor. After the compressor increases the pressure, it generally has the following uses:

1. The compressed gas produced by the screw compressor can be used for refrigeration and gas separation.

The gas is compressed and cooled to liquefy it and is used for artificial refrigeration. This type of compressor is usually called an ice maker or ice machine. If the liquefied gas is a mixed gas, each component can be separated separately in a separation device to obtain various gases with acceptable purity. For example, in the separation of petroleum cracked gas, it is first compressed and then each component is separated at different temperatures.

 

2. The compressed gas produced by the screw compressor can be used as power

After being compressed, air can be used as power to drive various pneumatic machinery and tools, as well as control instruments and automation devices.

 

3. The compressed gas produced by the screw compressor can be synthesized and polymerized

In the chemical industry, the pressure of certain gases increased by a compressor is beneficial to synthesis and polymerization. For example, nitrogen and hydrogen synthesize ammonia, hydrogen and carbon dioxide synthesize methanol, carbon dioxide and ammonia synthesize urea, etc. Another example is the production of polyethylene under high pressure.

 

4. The compressed gas generated by the screw compressor can transport gas

Screw compressors are also used for gas pipeline transportation and bottling, such as remote gas and natural gas transportation, chlorine and carbon dioxide bottling, etc.

 

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