What is the primary function of a TXV (Thermostatic Expansion Valve) in an HVAC system?

The primary function of a TXV is to meter the flow of liquid refrigerant into the evaporator coil while maintaining a constant superheat at the evaporator outlet.

How does a TXV respond to changes in the evaporator load?

A TXV automatically adjusts the refrigerant flow to match the evaporator load, ensuring optimal performance across varying conditions.

What are the common components of a TXV?

A TXV typically consists of a valve body, a diaphragm, a sensing bulb, and an equalizer line.

Why is maintaining a constant superheat important for an evaporator?

Maintaining a constant superheat ensures that the evaporator coil is fully utilized for heat absorption without allowing liquid refrigerant to return to the compressor, which could cause damage.

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