Content area
Full Text
refrigeration zone
When replacing a thermostatic expansion valve (TEV), it is usually easiest to replace the valve with the same make and model. However, there may be times when the original make and model is not readily available, so a replacement needs to be chosen.
Selecting a replacement valve that matches the original capacity, body type, type of equalization, and operating characteristics is important to ensure a proper operating system.
To choose a replacement TEV with the same capacity, a technician must refer to the selection tables of the replacement valve manufacturer. To determine the correct capacity for a replacement TEV, the technician must know the BTU capacity of the system, the type of refrigerant used in the system, the pressure drop across the valve, the liquid refrigerant temperature entering...