8/8/2023 0 Comments Pumping high viscosity liquids![]() System curve will become more restrictiveĪ simple way to explain the difference between these two terms is that…Ĭentipoise: Dynamic viscosity is a measurement of the force required to overcome fluid resistance to flow through a tube (or capillary).Ĭentistoke: kinematic viscosities are timed flow rates through orifices where the driving force is typically gravity.NPSHR will increase and the NPSHA will decrease.Pump efficiency will decrease significantly.See Hydraulic Institute/ANSI standard 9.6.7 for more details. For viscosity corrections we use centipoise units. Please be advised that at viscosities greater than 40 centipoise it is no longer an option and the curve must be corrected. Technically the pump performance curve should be corrected for viscosities above 5 centipoise (cps) which most people do not do. The viscosity of liquids will decrease as the temperature increases which is the opposite characteristic of gases.Ĭentrifugal pump published performance curves are based on water and so when moving viscous fluids the performance must be corrected. Simply stated does it pour fast or slow …or how quick will a ball bearing fall through a vertical column of the liquid? You may also think of viscosity as the internal friction resulting when one layer of the fluid is made to move in relation to another layer. Viscosity is that property of a fluid which tends to resist a shearing force. Liquid properties such as viscosity has relatively little effect on positive displacement pump performance and in most cases makes them even more efficient, but viscosity is pure kryptonite for centrifugal (rotodynamic) pumps. With the right selection and design, ZEILFELDER positive displacement pumps for highly viscous fluids offer an effective and efficient solution for transporting media in demanding applications.In the spirit of continuous improvement we like to occasionally remind our readers about important factors that are essential for a successful pump installation. ![]() ![]() Their ability to handle high viscosities and even effectively transport solids has made them an extremely versatile solution for a wide range of applications for almost 100 years. Overall, ZEILFELDER positive displacement pumps for highly viscous fluids are an excellent choice for pumping viscous media in the chemical and pharmaceutical industries. ZEILFELDER provides this design service free of charge to its customers in advance of quoting. Each design has its own advantages and limitations, and it is important to select the design that is best suited to the specific application. There are a variety of positive displacement pump designs, including gears, pistons and screws. ![]() By using a suitable displacement element, these materials can also be transported effectively, enabling a wider range of applications.Īnother important consideration when selecting a ZEILFELDER positive displacement pump for high viscosity fluids is the design of the pump itself. ZEILFELDER positive displacement pumps for highly viscous liquids are also able to extend their capabilities to the transport of solids integrated in liquids, such as fibres or granulates. For example, such a pump can be used effectively in pumping liquids such as syrup, honey, chocolate, molasses and other materials with high viscosity. Unlike centrifugal pumps, which are more suitable for aqueous media, ZEILFELDER positive displacement pumps work by using mechanical displacers to move the medium through the pump chamber.Ī ZEILFELDER positive displacement pump for highly viscous fluids offers several advantages, especially in the chemical and pharmaceutical industries where the ability to pump highly viscous fluids is of great importance. “Positive displacement pumps from ZEILFELDER are an excellent choice for transporting liquids with high viscosity, as they are able to pump these liquids effectively without compromising performance. ![]()
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