Profile: Chongqing Zhongke Oil Filter Plant Manufacture Co.,Ltd. is engaged in researching, developing and manufacturing lubrication purification equipments. We are an ISO 9001 certified company. Our products include insulation oil purifiers, lube oil purifiers, turbine oil purifiers and used oil purifiers. Rotary vane vacuum pump is a basic equipment used for pumping air from sealed vessels to attain vacuum condition. The vacuum pumps may be applied singly, or as the backing pump of the other kinds of pumps, such as booster pump, diffusion pump, molecular pump and titanium pump. It may be used for vacuum film-plating, vacuum heat treatment, vacuum casting and also air-extraction of electric tubes, bulbs & thermos flask. The oil-level floating ball or infrared liquid level automatic controller system is installed in the vacuum vessel to control the oil level so as to avoid the oil being suctioned into vacuum pump in the operation.