Which three styles of positive displacement compressors are used in the industry?

The three styles of positive displacement compressors commonly used in the industrial sector are reciprocating, rotary vane, and rotary screw compressors.

Reciprocating compressors operate using pistons that move back and forth within cylinders, creating a compression action as the piston moves down and draws in gas, which is then compressed as the piston moves up. This style of compressor is highly efficient and widely used in various applications, particularly where high pressure is necessary.

Rotary vane compressors utilize a series of vanes that slide in and out of slots in a rotor. As the rotor turns, the vanes create chambers of varying sizes, thereby compressing the gas effectively. This design offers reliability and reduced maintenance needs, making it suitable for a range of applications, including industrial ones.

Rotary screw compressors rely on two interlocking helical screws to compress the gas. As the screws turn, they trap and compress the air or gas within the spaces between them. This type is known for its smooth operation and ability to handle continuous service, making it ideal for large industrial systems that need constant airflow and pressure.

The other options include types of compressors that are either not categorized as positive displacement or do not belong to the same category as the three mentioned in the correct answer. For