Red Seal Refrigeration and Air Conditioning Mechanic Exam 2025 – Complete Practice Prep

Question: 1 / 400

What is the purpose of a TXV (Thermal Expansion Valve)?

To increase the pressure of the refrigerant

To filter out contaminants from the refrigerant

To regulate the flow of refrigerant into the evaporator based on temperature and pressure

The purpose of a Thermal Expansion Valve (TXV) is to regulate the flow of refrigerant into the evaporator according to the temperature and pressure conditions. This component is essential for ensuring that the evaporator coil operates efficiently and effectively.

In a refrigeration system, the TXV controls the amount of refrigerant that flows into the evaporator based on the superheat of the refrigerant leaving the evaporator. By adjusting the flow, the TXV helps maintain optimal conditions for the refrigerant to absorb heat from the surrounding environment, ensuring that the system operates efficiently and preventing issues such as liquid refrigerant returning to the compressor, which can cause damage.

This regulation is vital for maintaining the desired cooling capacity and efficiency of the air conditioning system. By adapting to varying load conditions, the TXV plays a critical role in the overall performance of the refrigeration system.

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To cool the refrigerant before it enters the condenser

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