Nissens 999388 A/C Thermal Expansion Valve

The Nissens 999388 is a precision-engineered thermal expansion valve (TXV) designed as a direct OE replacement for automotive air conditioning systems. As a critical control component of the A/C loop, this expansion valve precisely meters refrigerant flow into the evaporator, separating the high-pressure and low-pressure sides of the system while maintaining optimal superheat conditions for efficient cooling performance.

Key Features:

• Comprehensive testing and validation for pressure performance, tightness, opening characteristics, and set-point accuracy
• Power sensing element with specially formulated gas charge for optimal operation across temperature ranges
• Includes O-rings and mounting hardware for first-time-right installation
• Thoroughly tested internal finish ensures cleanliness and prevents contamination
• Precision-calibrated opening characteristics matched to OE specifications
• Designed to maintain proper AC compressor lubrication and prevent slugging or overheating failures

Nissens expansion valves undergo rigorous quality control including pressure output testing, sensing element behavior verification, and tightness validation to ensure reliable, trouble-free operation. Each valve is precisely preset during manufacturing and should not require adjustment. Backed by over 100 years of thermal systems expertise, Nissens delivers aftermarket components engineered to meet or exceed original equipment standards.