(1) The role of the air filter of the low-pressure screw air compressor. The air filter is a thousand-type paper filter whose main function is to filter dust in the air.
(2) The function of the intake valve of the low-pressure screw air compressor. Through the opening and closing of the intake valve, the loading, unloading and pressure adjustment of the low-pressure screw air compressor are realized.
(3) The function of the pressure switch. Rely on the pressure change of the low-pressure screw air compressor to control the suction of the intake valve electromagnetic valve to control the opening and closing of the intake valve, and further control the motor. It can be set to a maximum pressure value, the intake valve closes when this pressure value is reached, and a stop delay signal is sent to the motor, and another minimum pressure value can be set at the same time, the intake valve is opened or the motor is restarted when the pressure value drops to this value .
(4) The role of the outlet check valve. After the compressed air enters the air tank from the compressor, when the low-pressure screw air compressor stops, the compressed air is prevented from flowing in the opposite direction to the low-pressure screw air compressor.
(5) The function of the safety valve. When the pressure switch is improperly adjusted or fails to cause the pressure in the oil and gas barrel to be 0.1MPa higher than the rated pressure, the safety valve will open to protect the safety of the low-pressure screw air compressor unit.
(6) The role of the pressure maintenance valve (minimum pressure valve). It is located at the outlet of the oil-fine separator above the oil-gas barrel, and the opening pressure is set at about 0.45MPa.
The function of the pressure maintenance valve is:
1) Prioritize the establishment of the circulating pressure required by the lubricating oil during start-up to ensure the lubrication of the machine body. Machine oil lubrication is carried out by the pressure difference of the machine itself, without additional oil pump assistance, when the machine is in the no-load state, a certain pressure is still required to maintain oil circulation, so the intake valve is relatively closed, and the minimum pressure valve prevents pressure leakage, so Ensure oil circulation.
2) When the machine is loading at the moment, if the pressure maintenance valve is not installed, the large pressure difference generated before and after the separation inside the oil and gas barrel will all be added to the separator, causing damage to the separator core; therefore, the first pressure maintenance valve The second function is to open after the pressure exceeds 0.45MPa, which can reduce the air flow rate flowing through the oil-fine separator and protect the oil-fine separator from being damaged due to excessive pressure difference.
3) The role of the rear cooler. Reduce the outlet temperature of compressed air by cooling to ensure the safe use of compressed air and meet the performance requirements of air post-processing equipment. There are two cooling methods: air cooling and water cooling.
4) The role of the discharge solenoid valve. When the low-pressure screw air compressor is stopped or empty, the relief valve is opened to discharge the pressure in the oil and gas barrel, so as to ensure that the low-pressure screw air compressor can start or run without load when it runs again. Commonly used relief valves are two normally open solenoid valves or piston relief valves.
5) The role of the gas storage tank. The air storage tank is a container for storing compressed air and gas discharged from a low-pressure energy-saving air compressor. The air storage tank is beneficial to eliminate the pulse in the exhaust pipeline, and when the demand is greater than the capacity of the compressor, it can store and supplement the supply of compressed air. The longer the time interval.
6) The role of water and gas separator. A water separator is a device used to collect and remove the condensed water that precipitates from the air or gas during the cooling process.
7) The function of the automatic drain. Drain the moisture accumulated in the gas storage tank without manual operation.
Sollant Focus on Energy Saving
The low-pressure air compressor can be configured according to the user’s air pressure, using the least energy to meet your technological process, saving a lot of energy, and the manufacturing cost of your products will be considerably improved, and energy-saving and emission reduction will be realized. Commonly used air compressors generally have a pressure of 0.7mpa-0.8mpa. If the air pressure of your equipment is only 0.2-0.5Mpa, choosing a conventional 0.7Mpa air compressor will cause a huge waste of electricity, so choose Sollant low-pressure screw air compressor can save electricity by 20-50%. It is suitable for cement, chemical fiber, textile, ceramics, glass, surveying and surveying, exploration, and other industries that require large volume and low-pressure gas. In large factories, it is favored by users due to its stable performance, low failure rate, and easy maintenance.
According to the user’s working pressure, the internal compression ratio is automatically adjusted, and the best specific power can be maintained within the exhaust pressure range of 0.2~0.5Mpa. The forced lubrication of the oil pump is used to ensure sufficient fuel injection and the best air-air mixing ratio under extremely low exhaust pressure.
Services
High Efficiency
Low-temperature rise design, higher efficiency IP54 protection level, more stable and reliable than IP23 in harsh environments.
Energy-Saving
Using frequency conversion fan control, the oil temperature is constant, which greatly extends the service life of the lubricant.
Dedicated Host
The host specially developed for low-pressure conditions optimizes the screw profile and internal pressure to improve efficiency.
Knowledge of Low Pressure Air Compressor
Air compressors have become indispensable machinery in most factories. Whether used as a pneumatic mechanical energy source, air blowing and auxiliary use of other machinery have played a pivotal role. Different machinery uses air compressors with different pressures. Due to the difference in pressure in factory applications, there are two types of screw air compressors: high pressure and low pressure.
What is a low-pressure compressor?
Air compressors with exhaust pressure (use pressure) less than 0.8Mpa are called low-pressure machines. According to market demand, 8 Bar screw air compressors are in huge demand and have the most extensive production. Generally, we call air compressors less than 8 Bar as low pressure air compressors(low psi air compressors).
Examples and Applications:
In recent years, some high volume low-pressure screw air compressors have been designed according to the pressure of users. This is a relatively energy-saving product and has been slowly accepted by many customers.
The low-pressure air compressor is designed for cement, chemical fiber, textile, ceramics, printing and dyeing, glass, petrochemical, surveying and surveying and other industries with large volume and low pressure (0.2-0.5Mpa) gas industrial.
The pressure of the texturing machine used for blowing in the glass bottle industry and the textile industry is 0.25~0.3Mpa. Generally, it is recommended to use an air compressor with a pressure of 0.3~0.35Mpa.
Cement transportation: molding machinery in the foam industry. The yarn pressure in the textile industry is between 0.40 and 0.45 Mpa. Generally, air compressors with a pressure between 0.5 and 0.55 Mpa are used. The power gas with a pressure between 0.50 and 0.6 Mpa is generally recommended. Choose 0.70~0.75Mpa pressure
Low Pressure Screw Air Compressor Buying Guide
Atmospheric pressure 8 bar screw air compressor production technology is mature, and the production line is large. In general, whether it is a distributor or a manufacturer in the market, the recommended atmospheric air compressor is 8 bar or 10 bar, which is enough for most of our equipment. To use, there are many types of equipment that require non-normal pressure air compressors. For example, the laser cutting machine requires 16 bar, 20 bar, or even 30 bar.
The blowing industry may require tens of bar or even hundreds of bar of pressure. These can be used by custom The pressure is sufficient, but some customers have overlooked a problem. What if the required pressure is less than 8 bar? At this time, the dealer will say that 8 bar is enough, a bigger one is enough, and a smaller one is not good, but is this really the case?
As far as our common textile industry is concerned, the air-jet knitting machine needs 4-5 bar of pressure is enough, you may think 8 bar is OK, anyway, the machine is not broken, but have you considered a problem, the air compressor is extremely wasteful Electric equipment, its electricity consumption can account for 20% of the total electricity of the factory, which is very expensive. If you choose the right air compressor equipment, it will greatly save electricity, then you will have questions.
Buy 8 bar and buy What’s the difference between low voltage, isn’t it all such a large amount of electricity? Let us take 37kw8bar and 37kw5bar air compressors as examples to discuss the issue of electricity usage. The actual gas output of the 37kw8bar air compressor is 6.28 cubic meters per minute, the shaft power used is 39.4kw, and the specific power is 6.26kw/m3/min, while the gas output of the 37kw5bar equipment is 7.52 cubic meters per minute, and the shaft power used is 37.3kw. The specific power is 4.96kw/m3/min, 37kw 5bar air compressor saves electricity per hour than 8bar air compressor is (6.26-4.96)*7.52 *1h= 9.776 kw.h, taking the factory to work 8 per day Hours, 300 days of operation per year, the electricity saved in a year is: 9.776*8*300=23462.4kw, which is 23462.4 kilowatt-hours of electricity, according to China’s industrial electricity 1 yuan per kilowatt-hour (different prices in different regions), then one year The cost of an air compressor can be saved.
If the air compressor produced by our company can be used for 8 to 10 years, only the air compressor can save more than one hundred and two hundred thousand. For an air compressor, this cost-saving is considerable.
When your air pressure is 0.2-0.5Mpa, choosing a conventional 0.7Mpa air compressor will cause a huge waste of electricity. Choosing a medium and low pressure air compressor can greatly increase the compressed air production under the same motor power. Correspondingly, you can save power by 20-50%.
If you buy a 0.7Mpa machine, and the actual use pressure is 0.3Mpa, its working process is usually like this: the screw host first compresses the air to 0.7Mpa, and then reduces the pressure to 0.3Mpa through the pressure reducing valve. In other words, if you use a pressure of 0.3Mpa, what you bear is power consumption of 0.7Mpa.
