Foremost Machine Builders Suterbilt Positive Displacement Rotary Blower/Vacuum Pump. Model: VMF0721. S/N: 32685. Blowers/vacuum pumps deliver clean, oil free air to a wide range of applications that include wastewater treatment, methane gas recovery, combustion air, pneumatic conveying, process gas boosting, fluidized bed, vapor and gas extraction, composting, and vacuum systems. 10 in. dia. x 8 in. H filter. Reliance Electric Motor, 7-1/2 hp, 1750 rpm, 1225 rpm (final), 230/460 V, 18/9 amps, 60 Hz, 3 phase. Pulley ratio: 0.7. Inlets: (1) 4 in. dia. suction port. Outlets: (1) 2 in. dia. discharge port. Overall dimensions: 3ft. 2 in. L x 22-1/2 in. W x 5 ft. 4 in. H. (ACN51-87)