Diversitech TXVHE-404A-507 Txv R-404A Sae

Product Description

The DIVERSITECH TXVHE-404A-507 is a thermostatic expansion valve (TXV) designed to regulate refrigerant flow into the evaporator and maintain precise superheat control at the evaporator outlet. Built for use with R-404A refrigerant, this valve manages the transition between high-side and low-side pressures in a refrigeration circuit. Port connections are sized at 3/8 inch, 1/2 inch, and 1/4 inch SAE. Licensed refrigeration technicians and HVAC-R service professionals are the primary installers of this component.

This TXV is suited for commercial and light commercial refrigeration applications where R-404A is the system refrigerant. Typical installations include walk-in coolers, reach-in cases, and refrigerated display equipment. The valve meters refrigerant entering the evaporator in response to suction-line temperature and pressure conditions, keeping superheat stable across varying load conditions. It is well-suited for replacement or new installation in systems designed around R-404A operating characteristics.

Key Features

• Regulates refrigerant flow rate into the evaporator for consistent system performance
• Controls superheat at the evaporator outlet to protect the compressor from liquid slugging
• Designed for R-404A refrigerant systems
• SAE connection sizing at 3/8 inch, 1/2 inch, and 1/4 inch for straightforward field installation
• Suitable for commercial refrigeration replacement and new-install applications

Compatibility

Designed for refrigeration systems operating with R-404A refrigerant and equipped with standard SAE flare or sweat connections. Consult system documentation to confirm valve capacity and bulb charge match the evaporator load and refrigerant circuit requirements.

Installation Notes

Installation must be performed by a licensed HVAC-R technician holding EPA Section 608 certification. Recover all refrigerant and isolate the system before removing the existing valve. The sensing bulb must be mounted securely to the suction line at the correct clock position per the valve manufacturer guidelines to ensure accurate superheat sensing. Leak-check all connections after installation and verify superheat readings before returning the system to service.