The Series 457 Model 279 Quiet-Pac blower package is a vacuum blower package complete with both intake and discharge silencer for sound attenuation. This particular unit is capable of 2033 ACFM at 12.5 inches of mercury vacuum. Completely assembled, it includes a vacuum relief valve, blower, motor, and V-belt drive. All preassembled blower packages are custom designed using a standard design platform and include either vacuum, pressure or a combination of vacuum and pressure available in any size required to suit a particular application. Also available are optional blower packages with reduced sound levels to 85 DBA and lower.