Vacuum degassing unit CMM-6/7

The CMM-6/7 machine is used for the following purposes: heating, pumping and treatment of oil used as insulators or coolers in electrical equipment (transformers, OLTC , transformer bushings, high voltage switches etc). The oil treatment includes removal of particulate matter, gas and water. removal of air and gas from transformer tanks, if the gases enter the transformer in the course of repairs or servicing. The processing capacity of the machine is 3000 to 7000 liters per hour and depends on the selected mode of operation. DESIGN OF THE MACHINE The CMM-6/7 is built in a container. The container houses all the components of the machine: a cylindrical chamber, from which air is removed to reduce pressure and create vacuum; the components removing the air from the vacuum chamber (the booster and backing pumps); oil pumps; an oil heater; components that remove particulate matter from the oil (coarse and fine filters; a control system (control buttons and lights). OPERATION OF THE MACHINE The CMM-6/7 machine is multifunctional, i.e. it has several operation modes. The simplest mode is oil pumping. Only the filters and the pumps are engaged in this mode. The second mode allows to heat the oil and remove particulate matter. First, the pump transports the oil to the heater. Then the oil passes through the filter. In the end, filtered warm oil is pumped to the outlet of the unit. In the degassing mode the oil is pumped through the heater, where its temperature is increased to 50-55°С, then it goes into the filter section. From the filter, the oil goes into the metal chamber, where the vacuum pumps remove the air and the pressure is low.