Rotary vane pumps

Sliding Vane pumps have a number of vanes that are free to slide into or out of slots in the pump rotor. When the pump driver turns the rotor, centrifugal force, push rods, and/or pressurized fluid causes the vanes to move outward in their slots and bear against the inner bore of the pump casing forming pumping chambers.

As the rotor revolves, fluid flows into the area between the vanes (pumping cambers) when they pass the suction port. This fluid is transported around the pump casing until the discharge port is reached. At this point the fluid is squeezed out into the discharge piping.

Several Blackmer Sliding Vane pump models are equipped with replaceable liners and end disks. They protect the pump casings and offer the economy of simple replacment, restoring the pump to like-new efficiency, should the liner ever show significant wearVanes are actuated by three forces: 1 Centrifugal force from the rotor’s rotation, 2 push rods moving between opposing pairs of vanes, and 3 liquid pressure entering through the vane grooves and acting on the rear of the vanes. Each revolution of a Blackmer  Sliding vane pump displaces a constant volume of fluid. Variance in pressure has minimal effect. Energy-wasting turbulence and slippage are minimised and high volumetric efficiency is maintained.