Eccentric Movement Pumps

These pumps consist of a cylinder and a pumping element mounted on an eccentric shaft. As the eccentric shaft is rotated, the pumping element forms chambers with the cylinder, which increase in size at the intake port, drawing fluid into the pumping chamber. The fluid is transported to the discharge port where the pumping chamber size decreased. This action squeezes the fluid out into the discharge piping.

Sliding Vane Pumps

These 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.

Peristaltic (Hose) Pumps

The principle of the peristaltic hose pump is based on the alternating contraction and relaxation of the hose forcing the contents through the pump and into the discharge piping. A smooth wall, flexible hose is fitted in the pump casing and is completely squeezed between two shoes on the rotor and the inside of the pump casing. The rotating action moves the product through the hose at a constant rate of displacement without slip. The hose restitution after the squeeze produces an almost full vacuum that draws the product into the hose from the intake piping. The pump casing is half-filled with lubricant to cool the pump and lengthen the service life of the shoes and hose. Since the product only contacts the hose and not the internal pump components, this pumping technology is very suitable for abrasive and corrosive applications.

Visit Blackmer's Website