Why can NYP Gear Pumps Continuously Deliver Media with 1.0 to 300,000 cSt Viscosities?
2025-12-25 16:41:19
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From chemical reagents as thin as water to industrial raw materials as viscous as asphalt, these media exhibit viscosity differences of up to 300,000 times. Transporting such media poses a significant challenge in the field of engineered fluids. However, NYP gear pumps have become the core equipment for fluid transfer across multiple industries，from fine chemicals to heavy oil processingreliably delivering media with viscosities ranging from 1.0 cst to 300,000 cst to the next process stage. NYP series horizontal gear pump employs an internal gear system design that positions the inner rotor within the outer rotor, creating continuous sealed chambers through precise tooth profiles. This structure maintains near-zero relative sliding, substantially reducing fluid pulsation. Furthermore, the pump utilizes precisely calculated tooth profiles to ensure a continuous sealing line at any meshing position while minimizing oil trapping. This design ensures that even when handling extremely high-viscosity media, gear meshing does not generate excessive shear forces, thereby preventing changes in the properties of the media due to over-shearing.
To reliably handle multi-viscosity applications, the pump body utilizes high-strength cast iron or stainless steel construction and incorporates an adjustable axial and radial clearance system. When conveying low-viscosity media, clearances can be set to approximately 0.05mm to effectively minimize internal leakage and maintain essential operating pressure. For high-viscosity media, clearances can be appropriately increased to prevent equipment overload caused by excessive flow resistance.
In response to variations caused by different types of media, the NYP high-viscosity gear pump employs targeted material selection. On one hand, the pump body can be constructed from materials such as cast iron or stainless steel based on the properties of the conveyed medium. On the other hand, the gears are made from surface-hardened high-strength alloy steel. Through precision grinding and heat treatment, the surface hardness can reach HRC 60 or higher, ensuring long-term stable operation even when transporting high-viscosity media containing trace abrasive particles. Meanwhile, for high-viscosity media, the equipment can be equipped with a jacket structure capable of heating or cooling. This allows the medium to be thermally treated using steam or thermal oil to reduce viscosity, enabling smooth conveyance. When handling low-viscosity media susceptible to thermal effects, cooling water can also be employed to prevent pump body overheating. NYP series oil transfer gear pumps feature internal meshing gears, adjustable axial clearance, and material options. Their high viscosity, low shear, low pulsation, and wide flow range characteristics enable stable and efficient handling in high-viscosity fluid transfer applications.
