Designed for expanded flow and pressure, these industrial-duty, oilless air blowers can be used for pressure or vacuum. They provide air flow without pulsation, operate at low noise levels, and are dynamically balanced to eliminate vibration. Feature dustproof shaft seal and Class B NEMA insulation. Equipped with continuous duty TEFC motors that are built as a single unit—no gears, belts, motor bushings, or sliding valves. Aluminum alloy impeller, mounting base, and housing (Nos. VFC700A-7W, VFC804A-7W, and VFC904A-7W have cast-iron housing). Uses: For original equipment or upgraded performance. Pneumatic air tube conveying systems, vacuum cleaning systems, vacuum lifting, vacuum hold down, vacuum transport, bottle filling stations, printing presses, screen printing, air cushion tables, drying systems, weld fume extraction, textile machinery, dental equipment, waste and water fish pond aeration, aquarium aeration, aeration plating tanks, and air knife systems.