When recovering R-11 and R-23 from a low pressure system, how should they be recovered for faster results?

Recovering refrigerants like R-11 and R-23 from a low-pressure system in a liquid state is the most efficient approach. When refrigerants are recovered in liquid form, they occupy less volume and generally allow for faster recovery times. This is particularly important in low-pressure systems where the refrigerant is designed to be in a liquid state under certain operating conditions.

Using this method enhances the recovery process because the liquid can be effectively discharged into the recovery container without needing to convert to gas first, which can slow down the process as it would involve changing states and potentially leading to inefficiencies. Furthermore, recovering in the liquid state prevents the introduction of air and moisture, which could contaminate the refrigerant and impact recycling processes.

Other recovery methods, such as recovering in gas state or as a mixture of gas and liquid, can lead to longer recovery times and potentially complicate the process by requiring additional equipment to manage the vapor. In a low-pressure system specifically, liquid recovery is superior for maintaining efficiency and minimizing the time spent on recovery tasks.