| Mechanical Booster | Roots Vacuum | Rotary WSDM 7.5K | Oil Diffusion | Rotary KP-6000W |  The Specification  ㆍ Description Rotary Pump  ㆍ Maker EDWARD  ㆍ Model E2M275 (Two stage)  ㆍ Displacement (swept olume) 50 Hz : 292 ㎥h-1  ㆍ Displacement (swept olume) 60 Hz : 350 ㎥h-1  ㆍ Speed (pneurop) 50 Hz : 255 ㎥h-1  ㆍ Speed (pneurop) 60 Hz : 306 ㎥h-1  ㆍ Ultimate vacuum         (partial pressure) without gas ballast : 10-4 mbar       (partial pressure) with gas ballast : 5 x 10-3 mbar  ㆍ Weight : 225 kg  ㆍ Motor power 50 Hz 4-pole : 7.5 kW  ㆍ Motor power 60 Hz 4-pole : 8.5 kW  ㆍ Recommended oil (supplied) : ultra grade 19  The Specification  ㆍ Description Mechanical Booster Pump  ㆍ Maker EDWARD  ㆍ Model EH1200  ㆍ Displacement (swept olume) 50 Hz : 1195 ㎥h-1  ㆍ Displacement (swept olume) 60 Hz : 1435 ㎥h-1  ㆍ Speed (pneurop) 50 Hz : 0 -2900 r.min-1  ㆍ Speed (pneurop) 60 Hz : 0 -3500 r.min-1  ㆍ Weight : 61 kg  ㆍ Electrical supply voltage,3 phase 50 Hz : 220 - 240 V /380 - 415 V  ㆍ Electrical supply voltage,3 phase 60 Hz : 208 - 230 V /460 V  ㆍ Motor power : 3 kW  ㆍ Recommended oil (supplied) : ultra grade 20