Txv Diagram. TXV or TEV Thermostatic Expansion Valve. For a TXV to do what it is supposed to you need a full line of liquid before the TXV.
This type of TXV will allow the refrigerant pressures between the high side. If you think you may have a TXV issue there is a very simple test that can be completed using just crushed ice and a set of accurate gauges. In the piping diagram above place the unit in the defrost mode Button 2.
A thermostatic expansion valve TXV see Figure 1 is a refrigeration and air conditioning throttling device that controls the amount of refrigerant liquid injected into a systems evaporatorbased on the evaporator outlet temperature and pressurecalled the superheat.
Power element and remote bulb pressure. Learn How To Fix Old Car Air Conditioning Systems Science Cars. A thermostatic expansion valve TXV is a metering device that controls the amount of refrigerant that enters the evaporator coil. First take all of your refrigerant readings and your liquid line and suction temperature at both ends on a split system.