Why are shutoff valves required on recovery/recycling equipment?

Shutoff valves are essential on recovery and recycling equipment primarily to minimize refrigerant discharge to the atmosphere. This is crucial for several reasons, including environmental protection and compliance with regulations. When servicing HVAC systems, technicians may need to connect and disconnect lines, and shutoff valves serve to contain refrigerants within the system. By using these valves, technicians can effectively isolate the refrigerant, ensuring that it does not leak into the atmosphere during recovery or maintenance processes. This practice not only protects the environment but also ensures that the system operates efficiently and safely. Minimizing refrigerant loss is integral to preserving the integrity of the refrigerant charge and preventing potential harm from refrigerants that may be harmful to the ozone layer or contribute to climate change.