... control. Description of HTJ-150 oil cleaning: Widely applied in power supply bureau,power plant,transformer factory,vacuum smelting, welding, drying, ... chemical pharmacy, industrial and mining enterprise for vacuum pumping; Working platform pressure: 133pa Limit vacuum: 7pa Not suitable in pumping poisonous and ... China Ministry of Power Industry DL/T 521-2004 HTJ-150 Series Vacuum Oil Cleaning