The MRCOOL H4TXV01 Signature Series 1.5 to 2.5 Ton Thermostatic Expansion Valve Kit is a precision HVAC component designed to regulate refrigerant flow into an air-conditioning or heat-pump evaporator coil. It operates by sensing evaporator temperature and adjusting refrigerant flow to maintain proper superheat, supporting efficient and stable system performance. The kit is intended f... https://www.partshnc.com/mrcool-signature-txv-h4txv01