In a refrigeration system, suction line connects the evaporator to the compressor. It carries the low-pressure refrigerant vapor from the evaporator to the compressor

Suction filter is located in suction line of refrigeration  system between evaporator and compressor. It is used to remove contaminants from the refrigerant. Typical suction filter can cause a pressure drop of 2 psi or less

In refrigeration system, oil is used for lubrication of compressor moving parts, cooling compressor by absorbing heat, seal the compressor so that refrigerant does not leak out and for dispersing containments from compressor

Cool vapor flows in the suction line of a refrigeration system. The suction line connects the evaporator (cooling coil) to the compressor. It carries the low-pressure, low-temperature refrigerant vapor from the evaporator to the compressor

The refrigerant enters the expansion device in a liquid state. If refrigerant enters expansion device in vapor stage as it can lead to improper expansion, inadequate cooling capacity, poor heat transfer and risk of compressor damage

The main role of a TXV is to regulate the flow of refrigerant into the evaporator coil based on the cooling load requirements. Thereby it helps in maintain pressure difference between high pressure and low pressure sides of refrigerant system

A lower system refrigerant charge can actually lead to decreased reliability and efficiency of the refrigeration system.

Nitrogen is an inert gas, meaning it does not react with other substances. This makes it a safe and effective way to test for leaks.

Subcooling is the process of cooling a liquid refrigerant below its saturation temperature. Subcooling liquid refrigerant result in some pressure drop because subcooling reduces the density of the refrigerant, which reduces the pressure.

This phenomenon is known as the “boundary layer effect”. The higher velocity of the fluid in the boundary layer of a small diameter pipe causes the refrigerant to be closer to the inner walls of the pipe.

This limit is based on the need to ensure that the refrigerant does not flash into a vapor before it reaches the evaporator.

This is because the lower suction pressure means that the refrigerant vapor is less dense, and therefore requires less work to be compressed.

This indicates that there is not enough refrigerant vapor in the evaporator. Low pressure switch is a safety device that is designed to protect the compressor from damage.

Filter driers are typically located in the liquid line of the system (condenser to the evaporator). The filter drier contains a desiccant and is installed in the system to remove moisture and contaminants.