Industrial Progressive Cavity Pumps Roto Pumps / Roto

Supply and technical selection of Roto Pumps / Roto progressive cavity pumps for abrasive slurries, hygienic food processing, and chemical metering across global processing facilities.

Standard Progressive Cavity Pumps RD, RM, RL Series

Roto industrial progressive cavity pumps of RD, RM, and RL series handle abrasive and high-viscosity media. The modular drive train features a solid shaft and double sealed cardan universal joints. The pump range delivers operating pressure up to 48 bar and discharge up to 500 m3/hr.

Discharge capacity up to 500 m3/hr with working pressure up to 48 bar
Double sealed cardan universal joints protecting the internal pin mechanism
Pump housings available in ductile iron and stainless steel alloy
Integrated dry running protection sensor and mechanical shaft seals

Hygienic Food Grade Progressive Cavity Pumps DM Series

Roto DM series sanitary progressive cavity pumps transfer delicate food products, dairy batches, and pastes. Fluid contact components are machined from polished stainless steel to prevent bacterial residue. The design incorporates an aseptic food-grade elastomer stator and supports CIP washing.

Flow rate up to 86 m3/hr with discharge pressure up to 24 bar
Wetted metal components fabricated from polished 316 stainless steel
Aseptic food-grade elastomer stators resistant to vegetable oils and animal fats
Sanitary process connections complying with SMS, IDF, and RJT standards

Chemical Dosing Progressive Cavity Pumps RJ Series

Roto RJ series chemical metering pumps provide accurate dosing of flocculants, coagulants, and corrosive additives. The positive displacement geometry eliminates flow pulsation and maintains repeatability within 1 percent. Units operate at discharge pressure up to 24 bar across chemical lines.

Metering repeatability and volumetric accuracy within plus-minus 1 percent
Dosing output up to 500 liters per hour at pressure up to 24 bar
Continuous non-pulsating fluid stream protecting sensitive chemical reagents
Wetted rotors in 316 steel with corrosion-resistant Viton and EPDM stators

Wide Throat Hopper Progressive Cavity Pumps

Roto Wide Throat hopper pumps handle dewatered sludge, filter cake, and non-flowable viscous slurries with high solids. The enlarged rectangular feed hopper combines with an auger screw to push materials into the pumping stator. Heavy-duty universal joints absorb mechanical thrust and shock loads.

Capable of moving cake and slurries with high dry solids concentration
Integrated internal auger feed screw assisting positive rotor cavity filling
Rectangular hopper section configurable with bridge breaker paddle shafts
Reinforced universal joint geometry handling extreme radial and axial loads

Precision Rotors and Elastomer Stators for PC Pumps

Roto manufactures precision rotors and vulcanized elastomer stators for pump maintenance and retrofit. Metallic rotors are milled from alloy and stainless steel before heat hardening and hard chrome plating. Stators are molded using micronic tooling with NBR, EPDM, and Viton rubber.

Precision rotor manufacturing with hard chrome finish and uniform pitch profile
Stators molded from NBR, HNBR, EPDM, food-grade white rubber, and Viton
Wear compensation stator technology reducing operational friction and wear
Interchangeable retrofit spare parts for Netzsch, Seepex, Moyno, and Allweiler

Maintenance-in-Place Roto KWIK Progressive Cavity Pumps

The Roto KWIK pump series is engineered on the Maintenance-in-Place platform to streamline onsite servicing routines. A specialized clamp design enables a technician to inspect and replace the rotor and stator without unbolting pipelines. The one-piece stator build prevents fluid leaks under load.

Rapid rotor and stator replacement without unbolting suction or delivery piping
Seamless one-piece stator build eliminating fluid leakage along split lines
Quick-release clamp mechanism reducing routine pump maintenance downtime
Direct conversion path available to upgrade existing standard pumps to KWIK platform

Product Range of Roto Pumps RD, RM, and RL Series Progressive Cavity Pumps

The industrial progressive cavity pump range from Roto Pumps comprises the compact RD series with standard geometry, the medium to large capacity RM series, and the high-volume RL series featuring extended rotor and stator geometry.

The extended geometry minimizes rubbing velocities along elastomeric contact lines, significantly mitigating wear when moving abrasive mineral slurries.

These pumps are configured either in close-coupled format on a rigid baseplate with an electric motor or in bare-shaft configuration for severe operating environments across mining, chemical, and wastewater treatment industries.

Design Configurations and Sanitary Protocols of Roto DM Food Pumps

Roto DM series progressive cavity food pumps are engineered in compliance with international sanitary guidelines for dairy, brewing, winemaking, and food processing facilities.

The fluid contact zone is fabricated from polished stainless steel with mechanical shaft seals or flushed hygienic packings. The pump housing features clean-in-place CIP ports that enable thorough chemical sanitization without opening the pump interior.

Depending on plant piping standards, DM pumps are supplied with quick-release SMS, IDF, or threaded RJT sanitary process connections.

Accurate Chemical Injection with Roto RJ Series Dosing Pumps

Roto RJ series chemical metering progressive cavity pumps deliver continuous or batch injection of acids, alkalis, polymer coagulants, and water treatment additives.

Precision manufacturing of pumping elements ensures volumetric accuracy and repeatability within one percent without hydraulic pulsation. Compact dimensions facilitate direct integration into packaged chemical dosing skids and automated process cabinets.

Fluid pathway materials include stainless steel rotors and Viton or EPDM stators resistant to aggressive organic solvents and acids.

Auger Feed Mechanics in Roto Wide Throat Hopper Pumps

For handling dewatered sludge, high-solids filter cake, and non-flowable viscous pastes, Roto Wide Throat pumps feature an open rectangular hopper throat. Inside the hopper, an integrated auger feed screw continuously propels heavy media toward the rotating cavity of the rotor-stator pair.

For media prone to bridge formation, the feed hopper can be fitted with an independently driven paddle bridge-breaker shaft. A heavy-duty cardan universal joint mechanism provides reliable torque transmission under high mechanical thrust.

Material Science and Metallurgy of Roto Rotors and Stators

The working longevity of Roto progressive cavity pumps relies on precision manufacturing of metallic rotors and elastomeric stators. Rotors are machined on computerized mills from alloy steel, 304 and 316 stainless steel, or duplex alloys, followed by thermal treatment and hard chrome plating.

Stators are vulcanized under high pressure from oil-resistant NBR, EPDM, white food-grade rubber, or fluoroelastomer Viton, ensuring dimensional stability and thermal resilience under heavy industrial pumping conditions.

Operational Advantages of the Roto KWIK Maintenance-In-Place Platform

The Roto KWIK pump platform with Maintenance-In-Place technology reduces industrial plant downtime during routine pump overhauls.

A specialized quick-release clamp assembly secures the pumping element, allowing technicians to remove and replace the rotor and stator without unbolting suction and discharge manifolds. The seamless one-piece stator build ensures full pressure containment without fluid leakage.

Existing standard Roto pumps can be converted to the KWIK platform with minimal mounting adjustments.

Roto Pumps / Roto and model names are trademarks of their respective owners and are used only to identify the equipment for which we source parts. SpareX is not an official dealer, distributor or representative of Roto Pumps / Roto and is not affiliated with the trademark owner. Origin, documents and warranty are stated for each item in the quotation.