Progressive Cavity Pump

Roto Progressive Cavity Pumps operate on the principle of a single external helix metallic rotor rotating eccentrically within a double internal helix elastomer stator. This creates a series of continuously formed, sealed cavities that progress from the suction to the discharge end of the pump, carrying the fluid with them. This unique design provides:

• Positive Displacement: Ensures a uniform, metered, and non-pulsating flow, making them ideal for dosing and metering applications.
• Self-Priming: Inherently self-priming, Roto pumps can handle suction lifts up to 9.5 meters water column and operate effectively even in high vacuum conditions, eliminating the need for foot valves.
• Non-Clogging: Capable of handling fluids with high percentages of suspended solids, slurries, and even entrained air or gas without clogging.
• Low Internal Velocity: Minimizes degradation of shear-sensitive media and allows for efficient handling of highly viscous materials.
• Reversible Operation: Most Roto Progressive Cavity Pumps can operate with equal efficiency in either direction, offering flexibility in process flow.
• Silent Running: The rotor turning inside a resilient stator results in remarkably quiet operation.

Key Features and Advantages of Roto Progressive Cavity Pumps:
Roto’s commitment to innovation and quality is evident in the features that define their Progressive Cavity Pumps:

• Optimized Rotor-Stator Geometry: Minimizes wear due to lower rubbing velocities, especially beneficial in abrasive applications. This also leads to lower starting torque and improved volumetric efficiency, reducing power consumption and extending service life.
• Robust Universal Joints: Roto frequently employs the superior Cardan type universal joint, acknowledged for its ability to better withstand axial forces and provide smoother transmission of angular load compared to conventional joints. This significantly extends joint life and reduces maintenance.
• Improved Pump Housing: Designed with features like sloped housing for reduced entry losses and easy drainage, and flexible orientation of the suction port (rotatable in 90° steps) for versatile installation.
• Smarter Shaft Sealing: Externally mounted stuffing boxes facilitate easier maintenance of gland packing or mechanical seals without dismantling the bearing housing.