Wobble Pump

How does a Progressive Cavity Pump work?

A Progressive Cavity Pump is defined as a volumetric, self-priming, rotary positive displacement pump. The “conveying” part of the pump consists of 2 elements, namely a rotor & stator. The rotor is typically manufactured from a metallic material and formed in a single or multiple screw design with a rounded thread, large pitches, considerable length & high eccentricity in relation to its core diameter. The rotor rotates within the stator which is typically elastomeric and embedded with a cavity in the shape of 2 or multiple screws, double threaded and with the same eccentricity as the rotor. As the rotor turns the cavities within the stator are filled with the process media and are carried towards the pump outlet under pressure. As these pockets of fluid have a set volume the volumetric flow rate is therefore directly proportional to the rotational speed of the rotor and results in low levels of shearing and little to no pulse.

There are five series’ within our Wobble Pump Range:

RL Series

Extremely compact design where the motor shaft is attached to the rotor assembly via the patented pin joint system used across the Diamond series.

RJL Series

The same compact design as the RL series, however, is fitted with a bearing housing and bare shaft to allow for use with a flexible coupling and separation of the motor from the pump & process media.

The absorption of hydraulic forces is facilitated by the bearing housing.

RFL Series

The same principle as the RJL Series, however, with a bearing housing with a plug-in shaft design to facilitate a compact, close-coupled design with increased reliability and absorption of hydraulic forces via the bearing housing.

R Series

The most compact & economical design available, the motor shaft is connected to the rotor assembly via a cross-joint system. Specific sizes are also fitted or can be fitted with an integral & adjustable spring-loaded pressure relief valve.

• Excellent priming abilities, up to 4m, owing to special hydraulic features
• Low-pressure drop in the pump housing for optimal performance
• All features are based on a modular concept, allowing for various constructions without modifying the unit’s structure
• Versatile hydraulic components, casings, seals, stands, supports, and drive shafts
• R model pumps offer versatility with parts in fluid contact manufactured from Cast Iron, Stainless Steel (AISI 316/304), or bronze
• Low pulsation and tensional stress (predominantly axial pump system) with rotating parts in AISI type 306/316 Stainless Steel
• Internal single mechanical seals for standard use
• Positioned inside the pump housing for maximum heat exchange and increased durability
• Exceptional volumetric efficiency, even at high pressures, and minimal energy consumption
• Benefits from the special characteristics of a cavity pump for pumping fluids with different viscosities and solids
• Option for either electrical or hydraulic motors
• Designed for easy maintenance with a minimum number of replacement parts
• Cross-joint’s reduced dimensions allow easy replacement without changing shafts and rotors
• Highly competitive unit cost throughout its life cycle