Product description 3.3 Functional principle of the SIRIUS 3RW30 and 3RW40 soft Advantages Conveyor belts and transport systems: • Smooth starting • Smooth stopping Rotary pumps and piston pumps: • No pressure surges • Increased service life of the pipe system Agitators and mixers: • Reduced starting current Fans: • Protection for the gearbox and V belt SIRIUS 3RW30 / 3RW40 Manual, 01/2010, 535 1995-02 DS01 23