A TXV will stay closed until the sensing bulb pressure overcomes the low side pressures and spring pressure. Is this statement True or False?

A thermal expansion valve (TXV) is a critical component in refrigerant management within an HVAC system. The valve regulates the flow of refrigerant into the evaporator, ensuring that it meets the cooling demand efficiently.

The statement about the TXV staying closed until the sensing bulb pressure overcomes both the low side pressures and the spring pressure is accurate. The TXV operates based on the pressure changes detected by its sensing bulb, which monitors the temperature of the refrigerant leaving the evaporator. When the refrigerant temperature is low, the pressure in the sensing bulb is also low, which keeps the TXV closed. As the temperature rises (indicating that more refrigerant is needed to absorb heat), the pressure in the sensing bulb increases. This pressure must exceed the opposing low side pressure and the force exerted by the spring within the valve for the TXV to open, allowing refrigerant flow into the evaporator to meet the cooling demand.

Thus, the functioning of the TXV hinges on this pressure balance, ensuring proper operation and efficiency of the refrigeration cycle.