The Bosch HVAC 8733908309 Thermostatic Expansion Valve (TXV) is an OEM refrigerant metering component designed for R-410A HVAC systems, including Bosch and FHP water-source heat pumps. It regulates the flow of liquid refrigerant into the evaporator based on temperature and pressure, helping maintain proper superheat. This precise control supports efficient heat transfer, stable system... https://www.partshnc.com/bosch-hvac-8733908309-thermostatic-expansion-valve-txv-r410a