Nissens 999349 A/C Thermal Expansion Valve

The Nissens 999349 is a precision-engineered thermal expansion valve (TXV) designed for automotive air conditioning systems. As a critical control component in the AC loop, this valve precisely meters refrigerant flow into the evaporator while separating the high-pressure and low-pressure sides of the system.

Key Features:

• Designed for R134a refrigerant systems
• Inlet diameter 1: 11mm, Inlet diameter 2: 14.6mm
• Outlet diameter 1: 11.8mm, Outlet diameter 2: 17.7mm
• Includes O-rings and mounting hardware for first-time-right installation
• Precision gas-charged sensing element for optimal superheat control
• Thoroughly tested for pressure performance, tightness, and opening set-point accuracy

Quality Construction:

Nissens expansion valves are manufactured to OE-matching standards with comprehensive testing protocols. The power sensing element features a specially designed charge formula ensuring stable operation across varying refrigerant temperatures and pressures. Each valve undergoes rigorous validation for pressure output characteristics, inner tightness, and finish quality to ensure reliable AC system performance and protect the compressor from slugging, inadequate lubrication, and overheating.

This genuine Nissens replacement valve provides the precise metering control necessary to maintain optimal evaporator superheat conditions, ensuring maximum cooling efficiency and long-term system reliability.