Is it better for the air compressor to have no oil or to refuel?

Whether the air compressor is oil-free or refueled depends on the specific application requirements and scenarios. Here is a comparison of the two:

oil free air compressor:

advantages: The compressed air provided by the oil-free compressor is more pure and does not contain oil, so it is more suitable for some occasions with extremely high air quality requirements (such as medical, food, precision manufacturing, etc.). In addition, oil-free compressors are generally less expensive to maintain because there is no need to periodically change the lubricating oil.

Disadvantages: The initial purchase cost of oil-free compressors may be high, and they may wear faster under certain high-load operating conditions due to lack of lubrication.

Refueling air compressor:

advantages: The refueling compressor usually has a better lubrication effect, which can reduce the wear inside the machine, thereby extending the service life of the equipment. At the same time, such compressors usually have a high energy efficiency ratio and relatively low operating costs.

Disadvantages: Because compressed air may contain oil, it may not be suitable for applications with extremely high air quality requirements. In addition, the lubricating oil needs to be replaced regularly, which increases the maintenance cost and workload.

To sum up, the choice of oil-free or refueled air compressor should be determined according to the specific application requirements, budget and maintenance capacity. If you have strict requirements on air quality, or want to reduce maintenance costs, oil-free compressors may be a better choice. In other general industrial applications, a fueled compressor may be more suitable.