Overview
The sesame paste pump is a specialized industrial pump engineered for handling viscous food products with particulate content. Unlike standard centrifugal pumps, these positive displacement units maintain product integrity while moving thick materials through processing lines. Common in tahini production and nut butter manufacturing, these pumps feature robust construction with food-contact surfaces meeting 3-A or EHEDG standards. Their design prevents separation of oil and solids in emulsion-based products during transfer.
Structure and Working Principle
Most commercial sesame paste pumps utilize rotating lobe or progressive cavity mechanisms. Twin lobes or screws create sealed cavities that gently push product through the pump body without high shear forces that could alter texture. The pumps incorporate hardened rotors and FDA-compliant stator materials (often food-grade rubber) that withstand abrasive particles in unprocessed sesame paste. Precise clearances (typically 0.1-0.3mm) ensure efficient pumping while preventing product degradation.
Key Features
Modern sesame paste pumps offer several critical features for food processing. Sanitary quick-disconnect fittings allow for thorough cleaning, while polished interior surfaces (Ra < 0.8μm) prevent product buildup. Variable speed drives (typically 20-200 RPM) enable flow rate adjustments for different paste viscosities. Some models include integrated heating jackets to maintain optimal product temperature during winter operation or cold storage transfers.
Application Areas
Primary applications include tahini production lines, halva manufacturing, and nut butter processing facilities. These pumps handle viscosities ranging from 5,000 to 50,000 cP at production temperatures. Beyond food processing, modified versions serve cosmetic and pharmaceutical industries for transferring similar-thickness materials like ointments and cream bases. Their gentle action preserves delicate emulsions and suspensions.
Maintenance and Precautions
Regular maintenance focuses on seal integrity and wear component inspection. Mechanical seals require quarterly lubrication, while stator elements typically need replacement every 6-18 months depending on abrasive content in the product. Operators must avoid running pumps dry, which causes rapid stator degradation. Installation of pressure relief valves is recommended to prevent overpressurization when handling particularly thick batches.
B2B Procurement Guide
When sourcing sesame paste pumps, buyers should verify material certifications (FDA 21 CFR, EC1935/2004) and request viscosity performance curves. Opt for suppliers offering CIP-ready designs with documentation of cleanability validation. Consider total cost of ownership - pumps with harder stator materials may cost 20-30% more but last significantly longer with abrasive products. Request references from existing clients in similar applications to assess real-world performance.
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