Defrost valves AFV Series

Technical parameters：

Nominal pressure: 2.8MPa    Applicable temperature:-50℃～+150℃

Test pressure: 4.2MPa            Applicable medium:ammonia,fluorine,etc.

Characteristics：

- AFV valve is a three way solenoid valve, which is designed for defrosting by hot gas.

- AVF valve is designed with internal communication in each inner chamber to avoid

external pipes and connections. AFV valve is easy for installation.

- Refrigeration cycle:when the coil is currentless,joint B is closed. Valve is in normal

flow direction, from the evaporator to suction of compressor (joint C to joint A). See Fig 2

- Defrosting cycle: when the coil is energized, joint A is closed, hot gas flow from the

 pipeline (jiont B)to evaporator (joint C)for defrosting. See Fig 3

-When the temperature or time in the evaporator reaches the set value, the solenoid 

valve is closed, the hot gas defrosting will end, and the refrigeration cycle will start 

again.(but the fan needs to be delayed for a period of time before starting, 

commonly known as dripping time).

- AVF valve can only be connected with the exhaust integrated main pipe. It is not 

allowed to connect with the exhaust main pipe directely.