The upward stroke is usually used for the piston to draw in fresh air for the next compression cycle. Single-acting compressors are more straightforward in design, cost-effective, and suitable for applications requiring lower output capacities.

2. 2. Double-acting compressor

 In a double-acting compressor, the piston compresses air during both the upward and downward strokes. This occurs because the compression chamber is sealed on both ends. As a result, double-acting compressors produce compressed air with every stroke, resulting in higher efficiency and output compared to single-acting compressors. Double-acting compressors are commonly used in industrial applications that require higher output capacities.

 

The choice between a single-acting and double-acting compressor depends on factors such as the required output capacity, application, efficiency requirements, and cost considerations.