Where should pressure limiting devices be connected in a refrigeration system?

Pressure limiting devices in refrigeration systems are crucial for maintaining safe operating conditions. They are typically connected in positions where they can effectively monitor and control the pressure being generated by the compressor.

When pressure limiting devices are installed between the compressor and the stop valve on the discharge side, they can accurately measure the high-pressure refrigerant before it enters components like the condenser. This enables the device to protect the system from exceeding preset pressure limits, which could lead to system failures or damage.

Mounting the device in this location allows it to respond to changes in the discharge pressure and shut off the compressor or activate other safety measures if the pressure reaches unsafe levels. This is essential for preventing overpressure situations that could compromise system integrity and performance.

In contrast, locations such as the suction side or other specified parts of the system do not provide the same level of protection against high discharge pressures, which is why they would not be appropriate for the placement of pressure limiting devices.