Which devices are used to prevent freon leaks in refrigeration systems?

Valves and caps play a crucial role in preventing freon leaks in refrigeration systems. Valves are used to control the flow of refrigerant through the system, allowing technicians to isolate sections for maintenance or repair without releasing refrigerant into the atmosphere. Properly functioning valves can significantly minimize leakage points. Caps, on the other hand, cover access ports where refrigerant can be charged into the system or where pressure can be measured. By securely sealing these access points, caps help maintain the integrity of the refrigerant circuit and reduce the risk of leaks.

The other devices mentioned, such as pumps and compressors, are essential for circulating and compressing the refrigerant but do not primarily function to prevent leaks. Expanders and condensers are key components of the refrigeration cycle, managing the phase changes of the refrigerant but not specifically designed to prevent leaks. Similarly, filters and regulators manage the quality of the refrigerant and control pressures but are not used to seal the system against leaks. Thus, valves and caps are the primary devices focused on preventing freon leaks in refrigeration systems.