Diversitech TXVHE-134A-4S Txv R-134a Expansion Valve

Product Description

The DIVERSITECH TXVHE-134A-4S is a thermostatic expansion valve (TXV) engineered to regulate refrigerant flow into the evaporator and maintain precise superheat control at the evaporator outlet. Designed for systems operating on R-134a refrigerant, this valve meters liquid refrigerant based on suction-side superheat feedback, preventing flood-back while maximizing system efficiency. The inlet connection is 3/8 inch SAE, with a 1/2 inch and 1/4 inch ODF outlet configuration. Licensed HVAC technicians handling refrigerant service and system commissioning will find this valve suited for direct installation in R-134a refrigeration circuits.

This TXV is intended for use in R-134a refrigerant systems where accurate superheat regulation is required. Typical applications include light commercial refrigeration and HVAC systems that rely on R-134a as the working fluid. The valve is installed in the liquid line ahead of the evaporator inlet and works in conjunction with the external equalizer line and remote bulb sensor to respond to changing load conditions. It is appropriate for both new installations and service replacements in systems using this refrigerant.

Key Features

• Regulates refrigerant flow rate into the evaporator for stable system operation
• Controls superheat at the evaporator outlet to protect the compressor from liquid flood-back
• Compatible with R-134a refrigerant systems
• 3/8 inch SAE inlet connection with 1/2 inch and 1/4 inch ODF outlet ports
• Designed for direct replacement and new-installation use in refrigeration and HVAC circuits

Compatibility

Designed as an OEM-style replacement thermostatic expansion valve for R-134a refrigerant systems requiring a 3/8 inch SAE x 1/2 inch x 1/4 inch ODF valve configuration.

Installation Notes

Installation should be performed by an EPA Section 608 certified HVAC technician qualified to handle R-134a refrigerant. Recover all system refrigerant and relieve system pressure before cutting into the liquid line to install or replace this valve. Ensure the remote bulb is properly secured to the suction line and insulated to obtain accurate superheat readings. Follow the equipment manufacturer guidelines and applicable mechanical codes when routing the external equalizer line and completing the brazed or flare connections.