Engineering School on Instagram: "How Sensing Bulb Works in Thermostatic Expansion Valve (TXV) | HVAC Basics Sensing Bulb Working Principle in Expansion Valve Explained Role of Sensing Bulb in TXV | Refrigeration & Air Conditioning Expansion Valve Sensing Bulb Function | HVAC Training TXV Sensing Bulb Explained with Simple Working Principle In this video, we explain how the sensing bulb works in a thermostatic expansion valve (TXV). The sensing bulb plays a crucial role in controlling refrigeran