Oil-less Rotary Vane Vacuum Pumps
Q-VAC priming systems with oil-less rotary vane vacuum pumps are an excellent choice for priming applications with low to medium-lift requirements in projects that value reliable performance, low maintenance, and low operating costs. Oil-less rotary vane priming systems are a Q-VAC innovation that are especially well suited for clean water applications installed indoors. Unlike oil-lubricated pumps, these vacuum pumps use no oil whatsoever and can be operated continuously from atmospheric pressure to their maximum vacuum rating without concerns of overheating or oil carryover. As a result, smaller vacuum pumps can often be selected. Standard sizes are offered up to 7.5 HP, however larger sizes are available.
PRINCIPLE OF OPERATION: Oil-Less Rotary Vane Technology
In a cylindrical housing, a rotor is located eccentrically on a shaft near the top of the cylinder. Free moving, self-lubricating carbon composite vanes are positioned inside slots cut into the rotor. When the vacuum pump is started, centrifugal force slides the vanes outward against the cylinder creating multiple chambers, or cells, between the vanes, rotor, and cylinder. As the rotor turns, the cell volume is constantly increasing or decreasing, inversely affecting the pressure inside each cell. When the air reaches the discharge port, it is expelled without any concerns of oil carryover.