Diversitech TXVH-404A-507-4S Txv R-404A R-507

Product Description

The DIVERSITECH TXVH-404A-507-4S is a thermostatic expansion valve (TXV) designed to regulate refrigerant flow rate into the evaporator while controlling superheat at the evaporator outlet. With a 0.38-inch SAE inlet and a 0.5-inch ODF outlet, this valve maintains precise superheat control across a range of operating conditions. It is sized and rated for use with R-404A and R-507 refrigerants, making it suited for commercial refrigeration systems where these refrigerants are common. Licensed HVAC-R technicians are the primary installers for this component.

This TXV is applied in commercial refrigeration systems operating on R-404A or R-507 refrigerant circuits. Typical installations include walk-in coolers, reach-in cases, and other medium- to low-temperature commercial refrigeration equipment. The 0.38-inch SAE inlet and 0.5-inch ODF outlet configuration fits standard refrigerant piping in these applications. It is not intended for residential split systems or refrigerants outside its rated specifications.

Key Features

• Rated for R-404A and R-507 refrigerants
• 0.38-inch SAE inlet connection for standard field piping
• 0.5-inch ODF outlet connection for brazed refrigerant line attachment
• Controls superheat at the evaporator outlet for efficient system operation
• Regulates refrigerant flow rate into the evaporator to match load demand

Compatibility

Designed for refrigeration systems charged with R-404A or R-507 refrigerant. Consult system manufacturer documentation to confirm valve sizing and rated capacity before installation.

Installation Notes

Installation should be performed by an EPA Section 608 certified HVAC-R technician. Recover all refrigerant and confirm the system is fully depressurized before disconnecting any refrigerant lines. The ODF outlet connection requires brazing with appropriate silver-alloy filler and an inert gas purge to prevent internal oxidation. Verify superheat setting after startup and adjust the valve per the equipment manufacturer's specification.