Are air compressors with that structure better?

Screw compressors are generally used for process and instrumentation purposes, while reciprocating compressors are typically used for transporting natural gas

It is better to choose a twin-screw compressor. It operates very stably with a low failure rate; regular maintenance is all that is required.

This depends on the process requirements; the pressure parameters need to be determined.

For air compressors that merely supply compressed air for process and instrumentation purposes, screw compressors are used.

For process and instrumentation purposes, screw compressors are a better choice for air compressors, as they operate stably with a low failure rate.

Each type has its own advantages; it depends on your specific circumstances. Personally, I think screw-type ones are more stable! !

Our factory’s air compression workshop uses screw compressors. The new project uses twin-screw technology. It’s only been 2 months, so no difference can be seen yet. However, screw compressors are generally used for air. Stable and reliable

For gas flow rates greater than 100 m3/min or even higher, such as in large machining enterprises, centrifuges are required. For lower volumes and pressures, a screw compressor can be used; for higher pressures, such as 4 MPa, a piston compressor is required

The gas flow rate for instrument use is generally not high, and the pressure is low; in such cases, a screw compressor is more suitable. The maintenance of single-screw pumps is relatively simpler, while double-screw pumps are more technologically advanced; choose based on your own circumstances.

For instrument air, a screw compressor will suffice; Atlas models are quite good. If a compressor that uses lubricating oil is chosen, a filter needs to be installed after the air compressor to remove oil, gas, and other impurities. A dryer should then be added to ensure that the instrument air remains dry. Microheat regeneration types are usually preferred

Screw-type ones are better; they have a high flow rate and can meet the pressure requirements as well

Screw-type ones are better, as they operate smoothly, are easy to maintain, and have few failures.

The comments from others are all quite classic… The pressure of the air compressor in my factory is 0.60 MPa; it uses piston compression with reciprocating motion

Our factory uses screw air compressors; Guangdong Zhengli also uses them, but there are problems that arise. We have discussed this with the manufacturer, and they agree that there are certain design flaws.

In cases like yours, it is best to use a screw-type compressor; both single-screw and twin-screw types are suitable. Personally, I recommend the twin-screw oil-injected air compressor produced by Liuzhou Fuda. It offers a good price point and operates quite stably.

--------After carefully reading the previous comments, I noticed that many people were making comparisons based on the models they currently use, which isn’t very comprehensive. The original poster mentioned several alternative models; slide-type centrifuges and speed centrifuges should also be added. Additionally, single-screw and twin-screw types both belong to screw compressors. The screw compressors are classified into oil-free and oil-injected types. When selecting the machine to provide instrument air for the air compression station (offering two types of air: factory air and instrument air, with instrument air having specific requirements regarding dew point and oil content), it is necessary to consider factors such as air delivery volume, pressure, cost-effectiveness, and reliability. Sliding vane compressors are generally used in applications with low flow rates, where they offer better economic efficiency at 5 M3/MIN. This machine operates stably with low noise; its slides are made of graphite or other self-lubricating materials, resulting in minimal maintenance needs, low spare parts consumption, and good cost efficiency ； Piston engines have been around for many years, and L-shaped, W-shaped, and V-shaped designs are commonly chosen. The unit generates high noise, requires extensive maintenance, has many spare parts, consumes a lot of power, and has high installation requirements. However, the domestic production technology for piston machines is mature, with a wide range of standardized models available; the initial investment cost is low, spare parts are readily available at low prices, and there is extensive experience in maintenance and operation. Moreover, it is of the positive-displacement type with a high compression ratio, allowing the outlet pressure to be adjusted according to the pressure being compressed. Oil exists only in the crankcase, so the possibility of it entering the air is low; gas products do not require oil separation. It offers good cost-performance in applications with a flow rate of 20–30 M3/MIN. In recent years, screw compressors have been widely adopted due to their advantages of centrifugal stability, relatively low noise levels, automatic flow regulation, and easy volumetric pressure control. Additionally, they are simple to install, requiring only expansion bolts for fixation. However, the screw heads for these compressors are all imported as complete sets. (Currently, companies such as Wuxi Compressor Factory are also working on domestic development for the production of high-efficiency screws, but more efforts are still needed.) Although components are manufactured domestically, this approach ensures reliability but results in high investment costs. Moreover, these screws (or screw heads) basically cannot be repaired; if the clearance becomes too large and efficiency drops, the entire screw head has to be replaced, which is very costly. Screw compressors come in fixed and mobile types, with the mobile type being convenient for use in field operations. There are also oil-free and fuel-injected types. The oil-free type belongs to the dry screw category; it does not require oil separation of the gas, and can provide oil-free air. However, the manufacturing requirements are high and the price is high ； For the injection type, synthetic oil needs to be injected into the screw meshing surface, which requires oil separation from the air as well. Therefore, in addition to having spares for the air filter, the number of spares for the oil filter and oil strainer has also been increased. The price of oil filters is over 10,000 per unit, and synthetic oils are also quite expensive. Moreover, each manufacturer insists on the use of its own brand of spare parts and oils; otherwise, they will not be responsible for the quality of the equipment, which is another source of conflict. Screw compressors generally offer the best cost-performance ratio at 40–60 M3/min, with capacities of up to 100 M3 also possible. The screw compressor uses imported automatic control valves to regulate the air volume. The entire machine operates relatively stably, with a high degree of automation, allowing the position to be unmanned. The PLC panel offers Chinese and English for users to choose from. The motors are domestically produced and operate at 380V or 6000V voltages. For applications with high flow rates of over 100 M3/MIN, the most cost-effective option is the speed centrifugal multi-shaft gear compressor, which can reach speeds of around 15,000 revolutions per minute. It operates stably with low unit vibration, but generates high noise at high speeds. It uses tilting pads and thrust bearings (with temperature probes and axial displacement monitoring), an inducer wheel at the inlet, and two-stage or three-stage impeller compression. In addition to its high flow rate, this machine features oil-free compression. Air volume regulation is achieved using inlet guide vanes or frequency-controlled motors, but the effective air volume decreases in hot summer weather. These machines are expensive, but there are also many established brands from abroad, and they represent mature models as well. The unit is supplied as a complete set, with low installation requirements; it is fixed using expansion bolts. Maintenance can refer to centrifugal pumps and centrifugal compressors. The operating range is relatively narrow, so an anti-surge system is designed. The above provides a brief overview of the advantages and disadvantages of each model, which I believe will be helpful to the original poster. For more information, it is recommended to visit the “Compressor Network” – it features discussions on the selection of various small compressors, as well as comparisons of many different brands. Air compressor stations are equipped with molecular sieve dryers, which are primarily selected based on the volume of gas. It is generally supplied as a complete set by the compressor manufacturer, ensuring overall performance. This post was last edited by yzhaown99 on 2009-3-3 13:39.]

Based on our experience, screw-type ones are better; our company uses Sulzer products from the United States.