Which safety device is commonly used in refrigeration systems to prevent overpressure?

Pressure relief valves are crucial safety devices in refrigeration systems specifically designed to prevent overpressure situations. Overpressure can occur due to factors such as a system malfunction, excess heat, or blockages that hinder the flow of refrigerant. When pressure levels exceed predetermined limits, the pressure relief valve opens, allowing excess refrigerant to escape safely. This action helps maintain the system's pressure within safe operating limits, preventing potential damage to components and ensuring operational safety.

These valves are calibrated to activate at specific pressure thresholds, providing automatic protection when the system is in operation. Their role is essential in safeguarding both the equipment and personnel working with refrigeration systems, making them a standard safety feature in many applications.

In contrast, fuse links are primarily used in electrical systems to disconnect power in the event of an overload, thermostats control temperature rather than pressure, and flow switches monitor the refrigerant flow but do not directly address pressure issues. Therefore, the pressure relief valve stands out as the most appropriate choice for preventing overpressure in refrigeration systems.