Thrmo Scientific Masterflex peristaltic pumpsProgressive cavity pumps are often selected because they're better than many pump types for moving viscous media at lower velocities and typically have low pulsing flow. But their rubber stators can entrap abrasive particles that work against the pump’s steel rotor, causing excessive wear requiring frequent rotor replacement. Like progressive cavity pumps, Thermo Scientific Masterflex® peristaltic pumps handle a wide variety of solids and viscosities and provide very little shear, but Masterflex pumps also easily handle abrasive materials.