Trane VAL9891 TXV 326070-701 and typical rooftop unit (RTU)

and typical rooftop unit (RTU) configurations

or two-position control logic

making it fully approved for high-pressure R-410A applications

designed for standard brazed/sweat installation

As a senior HVAC technician

Trane VAL9891 TXV 326070-701 and typical rooftop unit (RTU)The Trane VAL09891 is a 3 ton thermostatic expansion valve engineered specifically for R 22 refrigerant systems. This TXV features a non adjustable, balanced port design that ensures precise superheat control across varying head pressures, preventing evaporator floodback and protecting reciprocating or scroll compressors. It utilizes a mechanical pressure sensing mechanism with an external equalizer to compensate for pressure drops across the coil.