... 500 and 3000 rpm 2. Capacity: 1500g STCT-4 Digital Display Asphalt Centrifuge Extractor Structure: The asphalt extractor consists of a ... . Speed variable between 500 and 3000 rpm4. Capacity: 1500g5. Time digital display, timing option: 30s, 60s, 90s, 120s, 150s6. Weight: 45kg7 ... mine powder from running away, time to be digital displayed, variable speed, reliable performance and light weight.