What you need to know about refrigerant flow
The Thermal Expansion Valve (TXV) is an important piece of equipment in the HVAC industry. The valve is used to control the amount of refrigerant released to the evaporator section. In this way it controls the difference between superheat and the current refrigerant temperature at the evaporator outlet. Therefore, This in turn keeps its saturation temperature at the current evaporating pressure stable. The Thermal Expansion Valve function is the control the flow of refrigerant into the evaporator in response to the cooling load. Additionally, TXV’s measure the superheat at the outlet and react to this by increasing or decreasing the amount of refrigerant flowing into the evaporator to try and maintain a constant superheat.
