Transformer Oil Purifier ZYD Series,Vacuum Oil Purifier Plant: 1.Vacuum dehydrator and degasifier. 2. ... One micron filters. Transformer Oil Purifier ZYD Series:ZYD transformer oil purifier is double stages vacuum oil purification ... oiling.8. Adopt interlocked protective system, which connect oil pump, heater and liquid level sensor, avoiding blank heating, blank pumping, oil ...