YNF17191 4475690 Expansion Valve Excavator A/C Expansion Valve Replacement

The YNF17191 expansion valve (4475690) is designed for excavator air conditioning systems, controlling the flow of refrigerant into the evaporator to ensure optimal cooling efficiency. As a key component of the HVAC system, the expansion valve regulates pressure drop and refrigerant volume based on temperature changes, providing stable and comfortable cab cooling.

Manufactured with precision thermal elements and corrosion-resistant housing, this valve performs reliably even in high-temperature, high-vibration, and dusty working conditions. Its accurate metering capability prevents evaporator freeze-up, reduces energy loss, and improves overall cooling performance.

Replacing a faulty or clogged expansion valve with YNF17191 restores proper refrigerant flow, improves A/C system efficiency, and enhances operator comfort—critical for long working hours. YNF offers stable aftermarket quality and competitive pricing, making it ideal for machinery distributors, HVAC repair shops, and construction fleet maintenance teams.