NASH ELMO RING VACUUM PUMP, MAX. FLOW RATE: 500 M3/H, MINIMUM FLOW RATE: 160 M3/H, INLET PRESSURE: 8 MBAR ABSOLUTE., MAX. INLET PRESSURE: 33.0 MBAR ABSOLUTE., OPERATING FLUID QUANTITY: 2.4 M3/H, SOUND PRESSURE LEVEL: 74 DB(A) AT 50 HZ, EXPLOSION PROTECTION DEGREE: II 2G BC T3, RATED SPEED: 1000/1200 MINUTES, MINIMUM SPEED: 913 MINUTES, MAX. SPEED: 1597 MINUTES, SERVICE FACTOR: 1.1