... for steelmaking, steel industry, and for melting stell from China 100t vacuum degassing furnace manufacturers, suppliers and company, or if you ... help of several stages of boosters, injectors, valves and pumps within very short time. The treatment effect of VD depends ... VD are as following:Compact process with many stages of vacuum pumpsHigh quality after VD treatmentAdopt Argon blowing during VD ...