AVF Defrost electromagnetism three-way valves

Technical parameters

• Nominal pressure: 2.8MPa
• Applicable temperature:-50℃ ~+120°c
• Test pressure:4.2MPa
• Applicable medium: ammonia, fluorine, etc.

Characteristics

• The AVF valves, are thre way valve with electric working,designed to use for defrost by hot gas.
• The valves are designed with internal comunication inter-chambers, avoiding external tubes and connections.
• Refrigeration cycle: when the solenoid coil loses power,the B interface channel is closed, and the AVF valve is in the normal flow direction, and the air is inhaled from the evaporator to the compressor.See Figure 2 for the connection between interface C and interface a.
• Defrosting cycle cycle: when the solenoid is powered on, the internal channel of AVF valve is switched, and the interface a to the compressor is closed, and the hot gas of interface B is connected through C.See Fig. 3 for defrosting after the inlet enters the evaporator.
• 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,and it is not allowed to be directly connected with the exhaust main pipe.