Which Pump for High-Viscosity Asphalt Transfer? An Analysis of Positive Displacement Asphalt Gear Pumps
Asphalt gear pumps are positive-displacement transfer pumps purpose-built for high-temperature, high-viscosity, easy-to-solidify media. They are widely used to transfer road asphalt, modified bitumen, emulsified asphalt, heavy fuel oil and similar viscous petrochemical fluids.
Driven by the volumetric change created by meshing gear pairs, this asphalt gear pump delivers steady operation and speed-adjustable flow. It is commonly equipped with a thermal jacket structure, making it the preferred transfer equipment for asphalt storage & transportation, asphalt modification processing and asphalt product production lines.
Asphalt features poor fluidity at ambient temperature and tends to solidify rapidly once cooled, which can easily block the pump chamber. That is why this type of bitumen pump comes with a standard heating jacket. Thermal oil circulates inside the jacket to continuously insulate and heat the pump body, preventing asphalt cooling, solidification and pump clogging.
The pump casing and gears adopt wear-resistant material formulation, adapting to working conditions where asphalt contains a small amount of hard fillers. Its sealing assembly is optimized for asphalt service to greatly reduce leakage risks.
Flow rate is proportional to rotating speed, supporting accurate metering transfer. It maintains stable discharge pressure and fits medium & high-pressure asphalt transfer applications. For asphalt plants and bitumen processing lines, jacketed asphalt gear pumps deliver consistent feeding, fewer unplanned shutdowns and lower maintenance cost for viscous bitumen handling.
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