maintaining the static pressure required for efficient flue gas venting

Precision Calibration: Pre-set to 4" WC to ensure optimal fuel-to-air ratios in natural gas applications

High Close-Off Pressure: Designed to provide tight shut-off and minimize leakage in high-head hydronic zones

Advanced Protection Logic: Includes integrated safety protocols for high/low pressure switches and brown-out protection to prevent compressor failure

Trane VAL8678 TXV 320734-701 maintaining the static pressure requiredAs a field technician, you know that precise superheat regulation is the difference between a high efficiency system and a slugged compressor. The Trane VAL8678 TXV is a genuine OEM thermostatic expansion valve designed specifically for 3 ton residential and light commercial HVAC units. This R410A thermal expansion valve features a robust 5 8 inch ODF mechanical fitting, ensuring a drop in fit for Trane and American Standard air handlers and