The BEKO 4015230 hot gas bypass valve attaches to the inside of the dryer to sense the temperature of the refrigerant. If the temperature gets too low this will exert hot gas to prevent freezing.
4015230 is used on the following BEKO refrigerated compressed air dryers:
Part #: 4015214
Part #: 4015215
Part #: 4015196
Part #: 4012682