Gear Pumps — Precision Positive Displacement
ROTOMAC offers a complete range of gear pumps for industrial fluid transfer — self-priming, non-pulsating, and capable of handling viscous clear liquids, oils, chemicals, acids, alkalis, and more across 18+ industries.
DesignSelf-Priming Operation
FlowNon-Pulsating Discharge
MediaHandles Up to 30,000 cSt
ConstructionMultiple Material Options
Pump Design Gear-Within-A-Gear Principle
ROTOMAC™ Gear Pumps
ROTOMAC gear pumps are positive displacement pumps designed for the reliable, controlled transfer of viscous clear liquids — from edible oils and petroleum products to chemical solvents, acids, alkalis, and hot syrups. Built with a variety of material options, they adapt to corrosive and demanding process environments.
Self-Priming Design — Gear pumps are inherently self-priming, eliminating the need for manual priming and reducing startup time in industrial processes.
Non-Pulsating Flow — The gear-within-a-gear design produces smooth, consistent, non-pulsating flow — essential for accurate dosing and metering of clear fluids.
High Temperature Capability — Suitable for handling viscous clear liquids at temperatures up to 200°C, including furnace oil, hot syrups, and heated process fluids.
Corrosion-Resistant Options — A variety of material options are available — including stainless steel and special alloys — to handle acids, alkalis, and corrosive media.
The Gear-Within-a-Gear Principle
ROTOMAC gear pumps operate on the internal gear (gear-within-a-gear) principle — delivering smooth, positive displacement flow through five precise stages.
Liquid Entry
Liquid enters the suction port between the rotor and idler teeth as they unmesh.
Crescent Seal
The crescent shape divides the liquid and acts as a seal between suction and discharge ports.
Travel Through Pump
Liquid travels through the pump between the gear teeth in locked, sealed pockets — assuring precise volume control.
Gear Mesh Seal
Intermeshing teeth of idler and rotor form a seal equidistant from both discharge and suction ports.
Discharge
The seal forces liquid out of the discharge port smoothly — producing non-pulsating, consistent flow.
Technical Specifications
Salient Features
Key performance characteristics of ROTOMAC gear pumps
Industries & Fluids Handled
ROTOMAC gear pumps serve a broad cross-section of industries — from refineries and food processing plants to marine, printing, and wastewater treatment. Below is the complete list of industries and fluid types handled.
Industries
- Brewery and Distillers
- Cattle Feed
- Chemical and Process
- Cosmetics and Toiletries
- Edible Oil
- Effluent Treatment
- Fertilizer
- Man-Made Fibres
- Marine
- Oil Exploration
- Paint and Varnish
- Paper Pulp and Cellulose
- Petrochemical and Refinery
- Printing Ink
- Sewage and Waste Water Treatment
- Soap and Detergent
- Starch
- Sugar
Fluids Handled
Not sure if your fluid is compatible?
ROTOMAC gear pumps handle a wide range of viscous clear liquids across corrosive and high-temperature environments. Contact our engineering team with your fluid properties and we will confirm suitability and recommend the right material configuration.
Ask Our Engineers →Need a Gear Pump for Your Process?
Share your flow rate, pressure, fluid type, and temperature — our engineers will recommend the right ROTOMAC gear pump model and material configuration for your application.
Head Office
D-4a, Panki Industrial Area, Site-1,
Kanpur – 208022, Uttar Pradesh, India