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ZYD transformer oil filtration machine is specially designed for on-line purification, the solid and liquid contaminants will reduce the insulation performance of transformer oil, ZYD machine utilizes the latest vacuum dehydration and degasification system to absorb dissolved water from oil which can provide a lower cost capacity of removing water down to 3 ppm. The transformer oil filtration machine is especially good for high voltage substation live line work onsite, it also can install moisture sensor, gas sensor and BDV tester for measurement of purified oil.