A thermal expansion valve or thermostatic expansion valve often abbreviated as tev txv or tx valve is a component in refrigeration and air conditioning systems that controls the amount of refrigerant released into the evaporator and is intended to regulate the superheat of the vapor leaving the evaporator.
Air conditioning txv valve.
Service technicians often confuse an undercharged system with a restricted metering device.
If the drier becomes saturated with moisture it releases it at the hottest times of the day.
Although often described as a thermostatic valve an expansion valve does not.
It uses a sensing bulb or disc that opens or closes the diaphragm to allow the refrigerant to pass through.
This moisture freezes in the expansion valve and deprives the evaporator of refrigerant.
However the undercharged system will have low condenser subcooling levels.
Since the minimum efficiency regulation changed to 13 seer in january 2006 most oem systems now incorporate a thermostatic expansion valve txv style metering device as the standard for air conditioning systems.
If your air conditioner isn t cooling your house or car properly it may be low on refrigerant or it may have a faulty expansion.
There are many components to an air conditioning system including the compressor condenser evaporator and thermal expansion valve or txv.
Air conditioning systems are often located in homes and vehicles.
Txv thermostatic expansion valve air conditioning systems contain a receiver drier that cleans and absorbs moisture from the refrigerant.
An expansion valve also called a tvx valve regulates the flow of refrigerant inside of a cooling system.
The symptoms of a system with a restricted thermostatic expansion valve txv are very similar to those of a system with a refrigerant undercharge.