Which type of compressor commonly utilizes a slide valve for capacity control?

Screw compressors commonly incorporate a slide valve for capacity control, which is an important feature in their operation. The slide valve mechanism allows for varying the amount of gas that is being compressed. By adjusting the position of the slide valve, the system can change the effective displacement of the compressor. This capability is crucial for optimizing energy efficiency, as it allows the compressor to respond to fluctuations in demand without cycling on and off frequently.

In a screw compressor, as the slide valve is moved, it can either allow more refrigerant to be compressed (increasing capacity) or restrict the flow (decreasing capacity) based on the cooling needs of the system. This adaptability makes screw compressors particularly well-suited for applications requiring continuous operation and varying loads.

While other compressor types may have their ways of controlling capacity, such as unloading mechanisms in reciprocating compressors or variable speed drives in centrifugal compressors, the specific use of a slide valve for this purpose is characteristic of screw compressors.