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.
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A thermal expansion valve or thermostatic expansion valve (often abbreviated as TEV, TXV, or TX valve) is a component in vapor-compression refrigeration and air conditioning systems that controls the amount of refrigerant released into the evaporator and is intended to regulate the superheat of the refrigerant that flows out of the evaporator to a steady value.
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 system’s evaporator—based on the evaporator outlet temperature and pressure—called the superheat. Figure 2 shows the different phases and pressures the refrigerant goes through as it is pumped through the system, moving through the evaporator, the compressor, the condenser, and the throttling device which injects ...
about Thermal Expansion Valves (TXV or TEV). • Provide some Basic Principles • Understand the Function and Purpose of TXV • Gain knowledge about operations of a TXV • Show some Types and Styles of TXV Valves • Answer some questions about TXV’s
Thermal expansion valves, or thermostatic expansion valves, are the expansion devices used most commonly with BPHE evaporators. TEVs are popular expansion devices due to their simplicity and availability, and their relatively good sensitivity an d accuracy in regulation. The large choice of expansion valve sizes and bulb charges means the capacity and temperature ranges are very g ood.
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