Progressive cavity transfer pumps are used to transfer fluid from one location to another through piping or to move fluid through treatment equipment. The pumps consist of a helical rotor, usually made of chrome-plated steel, rotating within a rubber stator with a profile similar to the rotor. The edges of the helical shape hold a seal against the stator, trapping the fluid and transferring it as the rotor rotates. The rotor is driven by an electric motor.
Progressive cavity pumps are positive displacement pumps, meaning that the same amount of fluid is moved with each rotation, regardless of the amount of back-pressure on the pump. This can cause an issue if there is excessive back-pressure as the rotor shaft can break. To eliminate this possibility, progressive-cavity pumps are often installed with a small relief line that runs from the outlet to the inlet of the pump.
For applications where fluid-shear is a problem, or in situations where they are required to pump against a high vacuum, progressive cavity pumps are ideal.
When selecting a progressive cavity transfer pump, the required flow rate and pressure are the most important factors, and the electrical classification of the motor should also be considered.
MLE Equipment uses progressive cavity transfer pumps manufactured by Moyno. Please see the provided specification sheets and manuals for more detailed information on progressive cavity transfer pumps.
